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1. ssscccsscccssssssssssssscccooees 24 7 1 1 Definition Of task Propertie cccccceeeeeeeeseeseeeeeeeeeeeaseoeseeeneeenseoeneneaeees 24 7 1 2 Modification of list Of stimuli 00 0 0 eeeeeeeeeeeeeeeeeeeeeeeeneeeeeneeeeeneeeeeneeeennees 27 7 1 3 Modification of list Of trialS cccceseseeeeeeeeeeeeeeeeneeeeeneeeeeneeseeneeeeaneeeeanees 29 7 1 4 Modification of list of presentation COMMANAS c cccceeseeeeeeeeneeeees 32 7 1 5 Modification of response processing parametels sccceeseeeeeeees 36 7 2 Editing of stimuli presentation protocol Manuallly ccccccssssscssccccccssssssscsssccosees 38 1 2 1 DETINIVION OF task NaMe isens aaa a aoaaa 38 7 2 2 Definition of stimuli list asnnannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne 39 1 2 32 DEMIUON OT tials HSU aa RARER 39 7 2 4 Definition of presentation command IISt cccseeeeeeeeeeeeseeeeeseneees 39 7 2 5 Subject response processing commands list definition 00 41 7 3 Optimization of the stimuli presentation Protocol cccccccccssssssssssccccccssssssssccscsees 42 9 HOW TO DISPLAY RESULTS OF INVESTIGATION WORKING WITH DATABASE 000 45 10 WORKING SYNCHRONOUSLY WITH THE WINEEG OR ANOTHER PROGRAM cccccceeeeooes 50 10 1 Definition of parameters Of synchronization ccccccccsssssssssscccccccsesssssssscccsssssssees 50 10 2 Working in Master Mode
2. 15 Using vertical marker measure the latency of beginning of test impulse attack corresponding to auditory stimuli Sound and enter this latency into Auditory stimulus field Fig 42 16 Using vertical marker measure the latency of beginning of test impulse attack corresponding to test signal Impulse and enter this latency into Test signal field Fig 42 59 11 Setup of PSYTASK user interface language For selection of PSYTASK user interface language press button Change language of main dialog window Fig 50 CI x start Hew Task Display Database Display List of Tasks Switch to Slave Mode Setup Database Modify Synchronization Parameters Change I0 port for test signal Fig 50 The next dialog window will appear on the screen Fig 51 Fig 51 Select language from the list press OK quit from PSYTASK program and run it again 60 Appendix The short description of tasks included as examples 1 Reversible chess patterns The reversible chess pattern tasks are used for recording visual evoked potentials There is a set of stimuli presentation protocols with different parameters of stimulation 1 The visual stimuli differ by angle size of rectangular cells in the pattern The angle size can be 5 10 15 20 25 30 40 50 60 minutes The angle size will be correct if 17 monitor is used and subject s location from monitor is about 1 5 meter 2 The patterns stimulate different visual areas left v
3. lt STIM_ID gt lt StartTime gt lt Exposition gt lt STIM_ID gt lt StartTime gt lt Exposition gt EndTrial Where TRIAL_ID the identifier of the trial the letters and digits only TrialLength trial duration in milliseconds STIM_ID the stimulus identifier see above StartTime the time of the stimulus onset in ms from the beginning of the trial and Exposition the stimulus duration in ms 7 2 4 Definition of presentation command list The description of presentation command should be placed below the description of trials The list of presentation command defines the sequence of trials and inter trial intervals A number of additional presentation commands can be used such as e Display a picture continuously can be used as description of subject task e Set background picture which is displayed on the screen between stimuli e Wait a number of seconds before continue to present next trial The last command 1s useful in case when it is necessary to make a delay after changing background picture Each presented trial is described by its name text identifier after trials delay and numeric label The after trial delay helps to present trials with random inter trial interval The numeric labels are used to sort the trials by means for computation of reaction time omission and commission errors 40 The list of presentation commands starts with the keyword PsyTest and ends with the keyword EndTest In between
4. Click Cancel to guit Setup and then close any programs you have running Click Next to continue with the Setup program WARNING This program i protected by copyright law and International treaties Unauthorized reproduction or distribution of this program or any portion of it may result in severe civil and criminal penalties and will be prosecuted to the masimum extent possible under law Cancel Fig 1 Press Next button to continue installation Choose Destination Location Setup will install Psytask m the following folder To install to this folder click Next To install to a different folder click Browse and select another folder You can choose not to install Psytask by clicking Cancel to exit Setup Destination Folder C MitsarPaptask Browse Cancel Fig 2 Press Browse button if you would like to change location of PSYTASK program Press Next button to continue installation Setup Type x Click the type of Setup you prefer then click Next ir Tupical Progrann will be installed with the most cormon iid i options Recommended for most users Compact Program will be installed with minimum required options f Custom You may choose the options you want to install Recommended tor advanced users Fig 3 Select the type of Setup you prefer and press Next button to continue installation Select Components x Select the components you
5. PSYTASK User Manual Version 1 50 Mitsar Ltd 2008 Table of content PINT RODUC FION oeeie e check eocsececetadicvceancsdeactsctcsteocsedecevadecactucctceestactusteuecedecesadecacecucdccestactuskevecteecs 4 2 MINIMAL IBM PC SPECIFICATION aiiai eea aeea e eea ERE a ELEN ENa 4 So PSY TASK INSTALLA TION ica era a aaa aa aaO a esi aaraa aeaa Saer 5 4 HOW TO RUN PSYTASK MAIN DIALOG WINDOW ssesseccececccccosssssscccccccccccoccosssssescccccecoccosssssssssccecoooo 9 5 MAIN DEFINITION PRESENTATION PROTOCOL sssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssso 10 6 STIMULI PREPARA TION PROGED UR Bigassesrocesoviuevacnvsvvceencsevecaasiuesescatoresvaceavccvsusesecsuvessseesvivassdscteeacdeebestes 14 6 1 The preparation OF PICUUE ES cscecsscscccccssiecsvassgetesastessvcesenececesuiutevesspeeeuatenevsesepenusecnsesesesss 14 6 2 The preparation OF sounds ceiseisissiaceccusievscinabenecceesvesesssieecacesuavcsiuasececeweivessaneiwccauestveseiness 14 6 3 The preparation of textual stimuli eeeeocsssssscecccccsssssececoocsssssccecccosssssccceoosssssssceeooso 16 6 3 1 The modification of content of textual stimuli assnnnnnnnnnnnnnnnnnnnnn 17 6 3 1 The modification of attributes of textual StiMUTl ccseeeeeeeeeeeeeees 19 7 PREPARATION OF STIMULI PRESENTATION PROTOCOLS ssssssssessssssssssssssssssssssssssssssssssssssosssso 22 7 1 Editor of parameters of stimuli presentation Protocol
6. during which the subject should respond Each trial is described by its name text identifier 12 duration and list of stimuli Each stimulus in the trial is described by its name text identifier offset from a beginning of trial to stimulus onset and stimulus exposition It should be stressed that the exposition of sound is equal its length as defined in corresponding stimulus file The description of two stimuli GoNogo task will be considered below as example In this task two different tones 1000 Hz low tone and 1300 Hz high tone are presented The exposition of each tone is equal to 100 ms Stimuli are presented by pairs corresponding to trials Interstimulus interval in a pair is equal to 1000 ms Two different pairs of stimuli are only presented low low tones Go trial and low high tone Nogo trial Trials are presented in random order with equal probability The interval between trials 1s equal to 1500 ms Subject has to press a button as soon as possible in case of presentation of the low low pair and ignore low high pair of stimuli Figure 9 shows schematically the time sequence of stimuli presentation in this task The scheme of stirmult presentation m Go ogo task B Press a button 0 i Isnore Nogo Subject response Poststimul interval Second stimulus Inter stimul interval First stimulus Prestimul interval Fig 9 The description of these trials is presented below Trial
7. O LATASK P300 4UC O Ps00 TS PATTERN O Tove H Fig 8 The stimuli presentation protocol is a text ASCID file It includes a list of stimuli list of trials list of presentation commands the sequence of trials in simplest case and list of response processing commands The list of stimuli should include all files used in stimuli presentation protocol Such as 1 All picture and sound files presented in the task 2 All picture files displayed during inter stimuli time intervals so named background pictures 3 All picture files used as description of subject task Each stimulus is described by its type Sound Image Text or Impulse name text identifier and additional parameter as name of corresponding file or index of textual stimulus stored in list of textual stimuli The example of list of stimuli is presented below StimuliList Sound H H WAV Sound L L WAV Image Task Task bmp Image BkGr BkGr bmp Text RedRed 0 Text GreenRed 1 EndStimuli The description of all trials should be placed after description of stimuli list The trial is a minimal time interval where a number one or more of stimuli are presented within And this sequence of stimuli defines unique subject response Each trial includes background time interval time interval before first stimulus time interval of first stimulus presentation between stimuli intervals time interval of second stimulus presentation and post stimuli interval
8. highlighted The simplest typing of the text by keyboard will modify the content of selected cell The table editor do not allow by default to change append a number of textual stimuli Check Allow add lines button to enable this option The additional line will be added if the user pressed down arrow in the case when the cell of last line 1s selected The additional textual stimuli can be added also from preliminary prepared ASCII text file Press the Add from button to do this The standard file dialog helps to select corresponding ASCII text file The format of this ASCII text file should be follow 18 Each row of text file ending by carriage return and line feed symbols corresponds to one textual stimulus The row of text file 1s separated to a number up to 8 strings corresponding to lines of textual stimulus Each string should be quoted and separated from other by space The sample of this text file is presented below Red WW Sample 1 WW woe wo wo wo wo wo WW Green WW WW Sample 2 WW wo wo wo wo wo wo Blue WW WW Sample 3 WW wo wo wo woe wo wo Red WW Sample 4 WW wo woe wo wo wo wo WW Green WW WW Sample 5 WW wo wo wo wo wo wo Blue WW WW Sample 6 WW wo wo woe wo wo wo Red WW Sample 7 WW wo wo wo wo wo wo WW Green W WW Sample 8 WW wo wo wo wo wo woe Blue WW WW Sample 9 WW woe wo wo wo woe woe Press the Replace from button to replace the content of the table by written preliminary strings to ASCII text
9. is located under the list of investigations The table of results is located under the subject s card This table includes the eight columns Condition the name for subject response processing command Total the total amount of trials which correspond to this condition Omission the percent of trials with omission errors Commission the percent of trials with commission errors RT1 reaction time calculated for a first pressed key button RT2 reaction time calculated for a second pressed key button StD RT1 standard deviation of reaction time calculated for a first pressed key button StD RT2 standard deviation of reaction time calculated for a second pressed key button 47 The button Edit Fig 37 is used for modification of subject personal information The next dialog window will appear on the screen Fig 38 x Task name Date 20 09 2005 Time 11 11 46 Subject name Nerpoe Birth date Gender h Hote z Cancel Fig 38 The button Find Fig 37 1s used for calling the automatic search of results of investigation using the given features The next dialog window will appear on the screen Fig 39 Base records search parameters x Tast name C Date from 0120172004 to HA0 Time from to i Subject FC Date of birth from to JEK Cancel Clear Fig 39 This dialog window is
10. is used for the start of new psychological test with presentation of stimuli and measurement of the reaction time and other performance parameters The button Display Database is used to open build in database to display results of testing and to prepare final report The button Display List of Tasks is used to run build in editor of presentation protocols list The button Switch to Save Mode is used to start the slave mode in which the PSYTASK is waiting for a control and synchronization commands from WinEEG program that is working on another computer connected to this computer via COM port The button Setup Database is used to modify the database pathname to open another existing database or create new one 10 The button Modify Synchronization Parameters is used to change parameters of COM port that is used for synchronization The button Change IO port for test signal is used to select COM port for generation of test signal on the RTS output of corresponding COM port stimulus type Impulse see below The button Change language is use to select appropriate language for user interface of PSYTASK program The button Quit is used to close PSYTASK program 5 Main definition Presentation protocol Different stimuli both visual and acoustic are presented during each task The subject should respond to presentation of stimuli by pressing a buttons or ignore them in dependence on subject task Four type of stimulus can b
11. ms with different frequency and four long tones duration is equal to 400 ms are presented every 1100 milliseconds Inter stimulus interval is equal to 1100 ms Total number of stimuli is equal to 994 There are 7 different sequences of stimuli presented randomly with equal probability 2 short 1 long 3 short 1 long 4 short 1 long 5 short 1 long 6 short 1 long 7 short 1 long and 8 short 1 long The frequency of presented tones is selected randomly Subject has to press a button Right Arrow Key as soon as possible in respond to long tones The parameters of performance are calculated for all short tones for all long tones for long tones after 2 4 short tones and for long tones after 5 8 short tones separately 12 Mismatch negativity task One of two easily discriminated auditory stimuli the low frequency tone 1000 Hz and the high frequency tone 1300 Hz or one of twenty complex auditory stimuli the combination of five short tones with the frequency 500 1000 1500 2000 2500 ms is randomly presented for 100 milliseconds every 850 milliseconds Total number of stimuli is equal to 2000 The probability of the low frequency tone is equal to 0 8 the probability of the high frequency tone or complex tone 1s equal to 0 1 There are two type of task active and passive In active task subject has to 63 press a button Right Arrow Key as soon as possible in respond to the high frequency tone and ignore other stimuli In passiv
12. near to the screen of monitor 56 Connect line output of sound card to another input of amplifiers box according to the connection diagram Fig 47 Set maximal output volume of sound card Connect RTS line of COM port to third input of amplifiers box according to the connection diagram Fig 47 Win EEG PE PSYTASK Fig 47 Perform Change IO port for test signal command and select corresponding COM port Fig 45 Perform Switch to Slave Mode command Fig 43 Run WinEEG program and perform File gt New command Select appropriate montage for recording of signals from three used inputs see WinEEG user manual for more information Perform Recording gt EEG recording on off command Perform Recording gt Stimuli presentation command 57 9 Select Synchronization measurement task from the displayed list and press OK 10 Check the beginning of presentation of stimuli 11 Check that the signals from special sensors are recorded like it displayed on Fig 48 i WinEEG IntervalsMeasurement EEG 19 42 24 a n paska Bua DopmaT Banvch AHanns Hactpo ka OKHAa Dlomowb Language w la x D Weu BEX Ar 2P E Iama w FAZARDARB i agny EGEA W gt Bis me dd DD X rF Ckopocre 30 MMC Yyscreur 50 mkB cr Y Cmewerme 0 0 O6rynure PBU cek 0 3 0 53 Tu 7 PHU Tu 150 7 50 Tu 45 55 T a Or SO E E E Fp2 Ref 1 50 mkB cm F7 Ref 50 m
13. presentation protocol Textual stimuli can be preliminary written to ASCII file also using any ASCII text editor as Notepad and then can be imported to list of textual stimuli The last option is very helpful when the list of textual stimuli is prepared individually for each subject In this case the template of stimuli presentation protocol is prepared preliminary and then textual stimuli are simple imported before each investigation The build in editor of list of textual stimuli is a dialog window consisting of two property pages 1 Change text property page see Fig 12 2 Change attributes property page see Fig 13 17 6 3 1 The modification of content of textual stimuli The preparation of modification of textual stimuli can be done using the next property page part of dialog window Change parameters of text stimuli l xX Change tert Change attributes Red Red DE 2 SSS EE ESS EEE E EEEE__ T Allow add lines Add from Replace from Save to OTMeHa PEAME Cnpaska Fig 12 This dialog window is an editor of simple table Each row of table corresponds to one textual stimulus Each textual stimulus can consist of one or more lines of text up to 8 lines Each column of table corresponds to one line of textual stimulus One cell of table can include any text that length is limited by 60 characters The keyboard arrows and mouse can be used to select active ready to modification cell that is
14. s 2isieccisecccesevadanceca cesta va anene onsena taana araa ia a EE ar Eai 53 10 3 Workmge in Slave ModE ecsesrresor sonene nRT AEREE EEES 53 TO Setup test sinal POF eeaeee EEEE E EEEE E N 54 10 5 Exact tuning of synchronization of stimuli presentation and recording of DIOCIOCUTICAN SIO AIS sc sccsessscceczeseseccucsiceceuses easar AE nE a EREE REER Ei 55 11 SETUP OF PSYTASK USER INTERFACE LANGUAGE cccccccccccccccccccccccccccccccccccccccccccccssssssssssseees 59 APPENDIX THE SHORT DESCRIPTION OF TASKS INCLUDED AS EXAMPLES eee 60 I Reversible CHESS patterns sis scesecsceescthtescesicawascetalescactesuesectateedecceeuseecustesseeeccwssextetesseaccedanexs 60 2 Test of Variables of Attention Tova cccccscccssccsssccscccscscccscccccccccccsccccecccscccccsccecceees 60 3 Visual Odd Balll task P300 J sesocessecsocescaceescesiecsdessncdesasedecteneosatesvaseseecccsaansevecsiasvecasaxce 60 4 Auditory Odd Ball task P3000 ss scvcesssccssdcetvsssancecassaseccsthceseccsuactsessaceascursansccastassacesdacaesinsds 60 De VISUAL GONOGO TASK eian ireann a a aE ENE 61 OG AUGILOEY GONOGO CASK ccescccsasessiicscescnesesesedeseweseadsesexetisswesanesesesavedschadesagevaveaes ih ncesecessyteasshace 61 Teken RPD CASK osii een a cas baseeueocesceceseieseussuecdens 61 S VCPI CASI rete eE E EEEE O ESATEA 61 9 Mathematical LAS Ke asesg ss cacscsusvsceasassacenssssssuusescecennusvscsanassscanenscs sues sesecansuseecuenesescansac
15. these fields by zeros if you are not sure in the correctness of existing values Attention Incorrect setting of time shifts will result to significant errors of synchronization of stimuli presentation and EEG recording 53 10 2 Working in Master Mode To start PSYTASK program in Master Mode it is necessary to perform the next steps 1 Specify parameters of synchronization This parameters will depend on which parameters are used in another program working in Slave Mode 2 Specify one of following synchronisation modes Send synchronously with beginning of each trial Send synchronously with first stimulus onset or Send synchronously with each stimulus onset 3 Start data acquisition in program working in Slave Mode 4 Start any task in PSYTASK program Attention The program working in Slave Mode should be able to receive synchronization codes and measure time moments when these codes are received 10 3 Working in Slave Mode To switch PSYTASK program to Slave Mode press Switch to Slave Mode button of main dialog window Fig 43 xl Start Hew Task Display Database Display List of Tasks Switch to Slave Mode Setup Database Change IO port for test signal Change language Quit Fig 43 54 In this mode PSYTASK program works automatically It is waiting for control and synchronization codes sent by WinEEG program and perform corresponding commands To exit from Sla
16. these words presentation commands are listed as follows PsyTest lt ScreenResolution gt lt ImageProcessing gt lt BackgroundColor gt ShowPicture lt STIM ID gt SetBackground lt STIM_ID gt Wait lt Delay gt lt TRIAL_ID gt lt AfterTrialDelay gt lt TrialLabel gt lt TRIAL_ID gt lt AfterTrialDelay gt lt TrialLabel gt lt TRIAL_ID gt lt AfterTrialDelay gt lt TrialLabel gt lt TRIAL_ID gt lt AfterTrialDelay gt lt TrialLabel gt EndTest Where ScreenResolution keyword that defines video mode It can be 640x480x256Colors 640x480xHiColor 640x480xTrueColor 800x600x256Colors 800x600xHiColor 800x600xTrueColor 1024x768x256Colors 1024x768xHiColor 1024x768xTrueColor 1280x1024x256Colors 1280x1024xHiColor 1280x1024xTrueColor 1600x1280x256Colors 1600x1280xHiColor 1600x1280xTrueColor ImageProcessing keyword that defines the mode of image positioning It can be LeftTop display picture at the left top corner of screen Center place picture at the center of screen FitToPage expand or collapse picture to the size of the screen BackgroundColor code of color used for filling the borders of the screen or as background color of textual stimuli The table of used colors is presented below RGB 0 0 0 0 ShowPicture keyword that define the beginning of Show the picture Message on the screen command lt STIM_ID gt the stimulus identifier the letters and digits only SetBackgro
17. 1280 x 1024 High Color 16 bit 1280 x 1024 True Color 24 bit 1600 x 1280 256 Colors 1600 x 1280 High Color 16 bit 1600 x 1280 True Color 24 bit Attention Some video modes can t be supported by video card or monitor of your computer The good idea is to try to set video mode using Control panel before selecting it Otherwise you can receive unpredictable results Attention During changing the video mode PSYTASK tries to set the current Windows refresh rate But some video modes can t be supported by video card or monitor of your computer The good idea is to try to set video mode with selected refresh rate using Control panel if you plan to use the screen resolution higher than screen resolution used by Windows Otherwise you can receive unpredictable results 26 5 Screen border color Press Screen border color button to define appropriate color The Colors dialog window will appear on the screen Fig 19 Fig 18 This color will be used both for filling of borders of the screen outsize the images and as background color for textual stimuli 6 Image processing method field Image processing There are tree options e Fit to screen The picture will be enlarged or collapsed to the screen size The aspect ratio can change e Centered The picture will be displayed at the center on the screen The unused areas on the screen will be filled by black color e Left Top The picture wi
18. LL 2500 L 300 100 L 1300 100 EndTrial Trial LH 2500 L 300 100 H 1300 100 EndTrial The description of presentation command should be placed below the description of trials The list of presentation command defines the sequence of trials and inter trials intervals A number of additional presentation commands can be used such as continuously display a picture can be used as description of subject task set background picture that is displayed on the screen 13 between stimuli and expectation of pending of a number of seconds before presentation of next trial The last command is useful in case when it is necessary to make a delay after changing background picture Each presented trial is described by its name text identifier after trials delay and numeric label This delay helps to present trial with a random inter trial interval The numeric labels are used to sort the trials by meaning for future computation of reaction time omission and commission errors The shorter list of presentation commands is shown below PsyTest 640x480x256Colors LeftTop Wait 2000 LL 100 2 LH 100 1 LH 100 1 LH 100 1 LH 100 1 LH 100 1 LH 100 1 LH 100 1 LH 100 1 LL 100 2 EndTest Finally the description of response processing commands can be added to stimuli presentation protocol The example is shown below ResponseProcessing Go 2 100 1000 VK_RIGHT Press None None 2 NoGo 2 100 1000 VK_RIGHT Skip None None 1 EndProcessing 14 6 St
19. NAL REPORT Name John Smith Date of Birth 10 10 1990 Gender M Task Tova Data 17 09 2004 Time 20 01 09 eC o n o e o NoGo 7 00o o0 of of of o0 Goha 5 00 00 24 0 8 0 NoGo Ghai 7 00 00o Of oO 0f o0 Goha 0 00 00 of of of o0 NoGo Rhai 0o 00 00o ol 0f 0f 0 Go i qua 5 00 00 24 0 8 0 NoGo iqua 7 00o 00 of of of o0 Go 2 qua 0 00 00 Of 0f Of 0 NoGo 2 qua 0o 00 00 Of 0f 0f 0 Go3qua 0 00 00 of of of o0 NoGo G qua 0 00 00 Of 0f 0f 0 Go 4qua 0 00 00 Of 0f Of 0 NoGo 4qua 0 00 00 of of Of o0 To create a new database or open an existing one use a command Setup Database of the main dialog window Fig 40 49 Fig 40 The standard File Box Dialog window helps to find an existing file of database or enter the name of new database file If the specified file does not exist the empty database file will be created automatically 50 10 Working synchronously with the WinEEG or another program PSYTASK program is able to work synchronously with WinEEG program and some others In this case two computers on which PSYTASK and WinEEG for examples programs are installed must be connected via COM port using NULL modem cable PSYTASK program can work in two modes master mode and slave mode The synchronous work of two computer with appropriate programs will be able only if the parameters of sync
20. be defined without errors The field File name is used to define name of corresponding file without extension only letters and digits with out space and any delimiters The file name should be defined without errors Following set of parameters should be defined for each simple tone Duration length of tone in milliseconds Attack duration of tone attack in milliseconds Decay duration of tone decay in milliseconds Type type of sound It could be Off silence Sine Square Noise R click and C click The type of tone for left and right channel is defined separately Frequency tone frequency in hertz This parameter is used for Sine or Square tones only The frequency of tone for left and right channel is defined separately Volume tone volume in dB The volume type of tone for left and right channel is defined separately Button OK is used for generation of sound and for saving Button Play is used for generation of sound and playing it Button Display is used for generation of sound and displaying its waveforms see Fig 11 16 Sound waveforms x Left UYN A dd Illa 100 110 120 130 Fig 11 Button Play is used for playing the sound 6 3 The preparation of textual stimuli Textual stimuli can be prepared manually by build in editor of list of textual stimuli during development of stimuli
21. ber There are two types of pairs in the first the result of arithmetical equation 1s equal to second number in the second not equal Subject has to press a button Right Arrow Key as soon as possible in respond to first type pairs and ignore second type pairs The duration of first stimulus in the pair is equal 400 ms and second 200 ms Inter stimulus interval in a pair is equal to 1100 ms Interval between trials is equal to 3100 ms The total number of trials 1s equal to 200 The parameters of performance are calculated for every condition separately 10 Reading task The Reading task 1s GoNogo task The visual stimuli are presented by pairs corresponding to trials The first stimulus is a word presented visually in the screen and second the same or another word presented auditory There are two types of pairs in the first presented words are the same in the second are different Subject has to press a button Right Arrow Key as soon as possible in respond to first type pairs and ignore second type pairs The duration of first stimulus in the pair 1s equal 200 ms and second is about 700 ms Inter stimulus interval in a pair is equal to 1100 ms Interval between trials is equal to 3100 ms The total number of trials is equal to 200 The parameters of performance are calculated for every condition separately 11 Auditory task One of eight easily discriminated auditory stimuli four short tones duration is equal to 100
22. command Set Background button Background Fig 25 This command is used to define the picture that will be displayed on the screen during inter stimuli interval The next dialog window is used to select appropriate stimulus Fig 29 35 Task Down rea Fig 29 7 Insert delay button Delay Fig 25 The next dialog window is used to define the duration of delay Fig 30 xi Delay ma aood Cancel Fig 30 8 Insert command Pause button Pause Fig 25 This command sends a special code to WinEEG program to temporary stop the data acquisition and stimuli presentation 9 Copy list of selected presentation commands to local PSYTASK clipboard button Copy Fig 25 10 Insert list of presentation commands to local PSYTASK clipboard button Paste Fig 25 11 Delete list of selected presentation commands button Delete Fig 25 36 7 1 5 Modification of response processing parameters The next property page is used for creation and modification of subject response processing command list Fig 31 Modify task parameters x Task Property Stimuli List Trials List Presentation Order Responce Processing Stimulus From To First Second Labels Go 3 2 100 m 1000 ms Fress KBD RIGHT None 2 Nogo 2 100 me 1000 me Skip KBD AIGHT None Bl Add Modify Delete Cancel Apply Help Fig 31 This dialog
23. ct the possibility to run some of stimuli presentation protocol on any computer It depends on different factors That 1s why it is strong recommended to test each new stimuli presentation protocol and optimize its time limitation if it is necessary 8 How to start new task and carry out an investigation To start new task press button Start New Task in the main dialog window Fig 34 x Start New Task Display Database Switch to Slave Mode Setup Database Modify Synchronisation Parameters Change 10 port for test signal Change language Quit Fig 34 The next dialog window will appear on the screen Fig 35 Start Net Task x Task Mame Tea o Date 2771072004 O Time PaA Subject Mame Jhon Smith Birth D ate ioveugso OO Gender Mae Motes First observatior Cancel Fig 35 Fill in the following items of the subject s card 43 44 Task Name is selected from the list by the keys Up and Down Date and Time of the investigation are set automatically However they should be checked and corrected if the calendar and clock of the computer are not set correctly Subject Name subject s name Date of birth the date of birth of the subject day month year Gender Gender of the subject Male or Female Notes Any additional text Can be left empty Press OK after the subject s card is filled in for starting the task 9 How to display re
24. e task subject has to ignore all stimuli and has to read a book or watch TV The parameters of performance are calculated for the low frequency tones standard stimuli for the high frequency tones deviant stimuli and for complex tones novel stimuli separately 13 Simple Stroop task The words Red Green and Blue are randomly presented for 200 milliseconds every 1700 milliseconds These words can be type using tree different colors Red Green and Blue The colors can match to meaning of words and can do not match The probability of each word is equal Subject has to press a button Left arrow key as soon as possible in respond to Red word Down arrow key to Green word and Right arrow key to Blue word Subject has to ignore the colors of the words The parameters of performance are calculated for each word separately for matching and not matching condition 14 Synchronization measurement task This task is used for exact tuning of synchronization of stimuli presentation and signal recording We recommend you read this presentation protocol yourself as the simple learning sample
25. e used for presentation 1 Image any pixel image writing to corresponding file of standard format as BMP JPEG and etc 2 Sound any auditory stimulus writing to corresponding file of WAV format 3 Text any multi line text written to special file the list of textual stimuli see below 4 Impulse a special testing signal generation on RTS output of COM port The sequence of stimuli their expositions inter stimuli time intervals and types of subject responses are described in so named stimuli presentation protocol the file with extension PRO Each stimuli presentation protocol together with the list of textual stimuli and stimulus files is stored in the List of Tasks The description of each task includes usually a name of task simple text name of folder in which the stimuli files list of textual stimuli file and file of stimuli presentation protocol are stored The working folder is created in the root folder of PSYTASK program usually C PSYTASK folder The list of tasks 1s written in the file with the name PSYTASK CFG It stored together with PSYTASK EXE program in the same folder For example see the figure 8 11 Br Psytask 10 x File Edit wiew Favorites Tools Help O o f Llie le Back Forward Up Search Folders Move To Copy To Delete Address C C MitsariPsytask Folders REPORT DOC E E Mitsar 9 GoNage E Uninst isu 9 BrainTuner san SoNagoy 3 doc 3 Gohogo oO Gohogay
26. eesssnessues 62 I0 Reading CASK niona aE N 62 Es PAICIEOLY ASKo rinni 62 12 Mismatehnezativity CASK cides ccsicsicescctevessssassecsesceescsdeusberedesceededaeasereseessessdacsbecuscocsecedseass 62 13 Simple Stroop taskas O S 63 14 Synchronization measurement task sssseccecsssecccccssecccccsceccccssecccccsseeccccssecccccssseececssseee 63 1 Introduction PSYTASK is a program for preparation and carry out both psychophysics and psychophysiology investigations PSYTASK main features are l A 3 2 Visual on the monitor screen and auditory using sound card and speakers stimuli presentation Reaction time measurement To measure the reaction time keyboard and mouse can be used PSYTASK is working together with Mitsar digital EEG recorder WinEEG software and provides a synchronous stimuli presentation with EEG acquisition In this case two computers connected via COM ports are used PSYTASK program works on the first computer and WinEEG program works on the second computer WinEEG program send synchronization codes to PSYTASK program to control its work and provides a synchronous stimuli presentation with EEG acquisition The recoded data can be used to calculate and analyze event related potentials ERP and or event related desynchronization ERD PSYTASK program can send synchronization codes to another program via COM port This feature provides a possibility to carry out ERP studies using another amplifie
27. esentation protocol 7 1 1 Definition of task properties Modify task parameters E xX Task Property Stimuli List Trials List Presentation Order Responce Processing Task Name Simole Strooo tazk Subfolder Hame Stroop Protocol File Name Stroop PRO Screen Resolution eoo 600 High Color 16 bit Screen border color Image Processing Left Top OTMeHa Enere Lnpaska Fig 18 25 The next parameters should be defined for each stimuli presentation protocol l 2 Name of task field Task Name any text Name of working folder field Subfolder Name only letters and digits without space and any delimiters Name of file of stimuli presentation protocol field Protocol File Name only letters and digits without space and any delimiters Video mode field Screen Resolution There is no possibility to change the video mode during the task It can be set only once at the beginning of task After the end of task the video mode will be restored to the Windows default It 1s possible to use the following video modes Default 640 x 480 256 Colors 640 x 480 256 Colors 640 x 480 High Color 16 bit 640 x 480 True Color 24 bit 800 x 600 256 Colors 800 x 600 High Color 16 bit 800 x 600 True Color 24 bit 1024 x 768 256 Colors 1024 x 768 High Color 16 bit 1024 x 768 True Color 24 bit 1280 x 1024 256 Colors
28. file The standard file dialog helps to select corresponding ASCII text file Press the Save to button to write the content of the table to ASCII text file 19 6 3 1 The modification of attributes of textual stimuli The modification of attributes of textual stimuli can be done using the next property page part of dialog window Change parameters of text stimuli 7 i xX Change text Change attributes Line 6 Line Red Red Red Green Rec Green Blue Red Blue Red Greer Red Green_Gre Green Blue_Greet Blue FAed Blue Red Green Green _Blur Green Blue Blue Blue Paint Change fort Change position OTMeHa SEPETE Cnpabka Fig 13 The list of textual stimuli is places on left upper corner of the window It is necessary to select one or several textual stimuli from this list to modify the attributes of them such as font type font size font color the position of text on the screen and etc Minimized sample of selected textual stimulus is displayed on right upper corner of the window Press Change font button to modify the font properties see below Press Change position button to modify the position of text on the screen see below 20 6 3 2 1 Modification of font properties The next dialog window is used for modification of font properties Font Ei Font style Size F Times New Roman F Trebuchet MS F Typolpright ET Utah F Utah Condensed Effects Strikeout T Underl
29. following steps should be done to specify this parameter 1 Perform Switch to Slave Mode command of PSYTASK program 2 Perform Analysis Stimuli Presentation Programs command of WinEEG program 3 Click Update button If synchronization COM ports are defined correctly the progress bar will display a process of transferring of task protocols from PSYTASK program to WinEEG program Otherwise WinEEG program will report that the slave computer does not respond 4 Change the COM ports and their parameters if it is necessary using Modify Synchronization Parameters command of PSYTASK program and Setup Equipment configuration command of WinEEG program and perform 1 3 steps It is necessary to find correct combination of COM ports Attention It is necessary to perform steps 1 3 every time when the list of tasks or their parameters is changed in PSYTASK program 52 Attention PSYTASK program is able to send correct task protocols Please be attentive and check new task protocols before updating list of protocols for WinEEG program There are different synchronization modes of PSYTASK program This mode depends on how the PSYTASK program will be used The field Synchronization mode is used to change synchronization mode The following modes can be selected 1 Don t send synchronization codes WinEEG control this mode is used if PSYTASK program works in Slave Mode together with WinEEG p
30. fter trial delay will be specified for each added trial x List of trials Minimal after trial delay rms fi 00 Maximal after trial delay m fi OU Label fi Number of each trial 2q Select all Unselect all Cancel Fig 26 If the list of marked trials includes more that one trial the each trial will be added to list of presentation commend the number of times being equal to parameter Number of each trial This means that 40 trials will be added in described example Fig 26 20 UU trials and 20 UD trials Finally if you need to add trials with different digital labels this procedure should be repeated many times 3 Change parameters of selected presentation commands button Modify Fig 25 The next dialog window is used for this goal Fig 27 Change trials labels and delays l x Trial label 2 Aftertrial delay m jo Cancel Fig 27 34 Only modified parameters of presentation commands should be defined during this procedure Unfilled fields will be ignored 4 Randomize the order of presentation command in selected list button Randomize Fig 25 5 Add command Display Picture button Display Picture Fig 25 Usually this command is used to display the description of subject task on the screen The next dialog window is used to select appropriate stimulus Fig 28 Select stimulus xi BkGr Down Up rea Fig 28 6 Add
31. hronization is specified correctly 10 1 Definition of parameters of synchronization To specify or change the parameters of synchronization press button Modify Synchronization Parameters of main dialog window Fig 41 x Start Mew Task Switch to Slave Mode Setup Database Modify Synchronisation Parameters Change I0 port for test signal Change language Guit Fig 41 The next dialog window will appear on the screen Fig 42 51 Parameters of synchronisation f xX Parameters of Synchronization Port Synchronization port to which a master computer i connected COM Baudrate 57600 Number of bits le Parity None Stop bits fi synchronisation mode Don t send synchro codes WinEEG control Correction of synchronization for Visual stimuli ma lo Auditory stimuli ma lo Test signal me lo Cancel Fig 42 The parameters of the synchronization port should be defined such as port number Synchronization port to which a master computer is connected the speed of transfer Baud rate the length of the transferring word Number of bits the number of stop bits Stop bits checking parity Parity Usually for WinEEG program the following setting is needed Baud rate 57600 Number of bits 8 Stop bits l Parity None There is no way to automatically define number of COM port to which master computer is connected That is why the
32. imuli preparation procedure Stimuli should be prepared manually before starting of task design excepting simplest sounds and textual stimuli 6 1 The preparation of pictures The pictures graphic pixel files can be prepared using any graphic editor such as Paint PhotoShop and other PSYTASK can use graphics pixel files of standard formats such as BMP JPEG and some other If some graphics file format is not compatible with PSYTASK for example PCX this file can be converted to another format using the graphics editor The some simple rules should be kept in the mind during the preparation of pictures 1 Don t use picture with the resolution size more then intended screen resolution These pictures can be used but the PSYTASK program will work slower and time limitation will be stronger The color distortions can appear also in some cases The optimal resolution 1s equal to screen resolution 2 Don t use picture with the high color resolution if this is not necessary This increases the real time of stimuli preparation before them presentation 3 PSYTASK can use the picture with 1 bit colors monochrome 4 bits colors 8 bits colors 16 bits colors and 24 32 bits colors PSYTASK can also set different video modes 8 bits colors 16 bits colors and 24 32 bits colors Don t use the pictures with color resolution higher than video mode color resolution The color distortions will appear in this case 4 If the size
33. imulus a aa E IE I l sm Add ShowPicture Task Seth ackgraund BkGr Wait 2000 ms Modify UL 100 ms 2 L UU 100 me 2 Randomize 4 UU 100 me 2 4 UL 100 rms 2 z UD 100 ris 1 Bi UC 100 ms g UD 100 ms Display Picture 4 UL 100 ms A UD 100 ms 1 UU 100 me 2 Background UL 100 ms 2 UL 100 rms 2 Delay UL 100 ms 2 UD 100 rms 1 UD 100ms 1 Pause UL 100 rms 2 Je UL 100ms 2 To UL 100ms 1 14 UL 100 ms 2 20 UL 100 ms 2 2 UD 100 ms 1 ee UL 100 ms 2 ante 24 UD 100 ms 1 2d UL 100 ms 3 25 UU 100 ms 2 Haste 2 UL 100 ms 2 er UL 100 ms 2 Delete eu UD 100 ms 29 UL 100 ms 2 le Cancel Apply Help Fig 25 This dialog window allows user to 1 View description of sequence of commands and select list of commands The selection of commands works very similar to Windows Explorer 2 Add one or a number of trials to the list of presentation command Fig 25 The next dialog window is used to add trials Fig 26 All trials that you are going to add trials should be marked The buttons Select all and Unselect all help to mark stimuli The minimal and maximal after trial delay fields Minimal after trial delay and Maximal after trial delay numeric label of trials field Label and number of trials that will be added field Number of each trial should be also defined 33 If Minimal after trial delay is not equal to Maximal after trial delay the random a
34. in pixels of picture is lower then screen resolution there are different ways to display it depending on picture preprocessing mode PSYTASK allows to select off picture color for filling the borders of the screen 6 2 The preparation of sounds The sounds can be prepared by different ways using build in sound generator coping from any library of sounds recording new sounds using sound card from any source of sounds CD player or microphone The optimal format of sound files for PSYTASK is following sampling rate 44100 Hz 16 bits stereo The build in sound generator can be used for preparation of simplest sounds during development of stimuli presentation protocol This generator provides a possibility to generate a sound consisting of a number up to 8 of consequent tones modulated by trapezium The parameters of tones for left and right channel are defined separately The next dialog window helps to define parameters of tones Fig 10 x Hame Sound File name Sound Left Right Duration ma Attack me Decay me Type Frequency Hz Volume Type Frequency Hz Volume G Sine fioog MAX Sine 2000 MAX 5 Sine s00 MAX or 2000 MAX fo Sine 2000 MAX my co cc UL TT Total duration ma f Fi Cancel Display Z Fa Fig 10 The field Name is used to define text identifier of stimulus only letters and digits without space and any delimiters The name should
35. ine Color Black AabbAato Script Cyrillic This i a screen font The closest matching printer fort will be used for printing Fig 14 Use Font list to choose font name from the list Use Font Style list to choose font style normal italic bold Use Size list or enter manually appropriate font size Check Effects buttons to select Underline and Strikeout options to set corresponding effects and choose font color Check select font properties looking at Sample field in which the font sample is displayed Use Script menu to choose appropriate script character set 21 6 3 2 1 Modification of text position on the screen The next dialog window is used for modification of text position Position of text on the screen l x Parameters of output rectangle Left margin 2 Top margin 42 0 percent of screen width Width 4 100 percent of screen width Height 2 100 percent of screen width Test alignment Horizontal alignment Center Vertical alignment Center Fig 15 Use Parameters of output rectangle controls to select appropriate position of it The whole screen is used as output rectangle by default Both the position of left upper corner and size of output rectangle can be changed It should be stressed that parameters of output rectangle are set by percent of screen size That is why the position of output rectangle does not depend on the screen re
36. invisible The setting of the background picture can be recognized as additional stimulus That is why it is strong recommended to place Wait command after this command If the stimuli list includes less than 128 stimuli entire corresponding file will be loaded at the beginning of task Otherwise the next subset of stimuli will be loaded before the next trial That is why the delay after previous trial should not be very short The preparation of the next stimulus is performed during inter stimulus interval That is why these intervals should not be very short If the picture will replace by the next stimulus without displaying of background picture the exposition of this stimulus should be equal to zero In this case the picture will replace the background picture For example see Reversionary patterns task The picture is displayed with some delay being less or equal to the time interval used to display one screen frame It depends on screen refresh rate To minimize this delay try to set maximal screen refresh rate in Control Panel The video and auditory stimuli can be presented simultaneously But some delay between video and auditory stimuli onsets can appear The value of this delay depends on the hardware but usually it is shorter than 10 ms Some problems with synchronization of stimuli presentation can occur if the sound onset is very close to the visual stimulus offset There is no way to theoretically predi
37. isual area L right visual area R and both left and right areas A There are stimuli presentation protocols include stimulation only entire visual area A the left area at the first part of task and right area at second part of task LR and full visual area at the first part left area at the second part of task and right area at third part of task ALR The patterns are switching with two per second rate Each session includes 100 switches of patterns The subject should look at the middle of screen or at the special filled circle 2 Test of Variables of Attention Tova One of two easily discriminated visual stimuli a coloured square containing a small square adjacent to either the top or bottom edge is randomly presented for 100 milliseconds every 2 seconds The stimulus with the inner square adjacent to the top edge is the designed target Subject is instructed to press a button Right Arrow Key every time they see this stimulus The target non target ratio differs in two halves of the TOVA The target is presented on 22 5 of the trials during the first half whereas the target is presented on 77 5 of trial during the second half The total number of presented stimuli is equal to 640 The parameters of performance are calculated for Go and Nogo condition for full test for first half and second half of task and for each quarter of task separately 3 Visual Odd Ball task P300 One of two easily discriminated vis
38. kB cm fE El gt Ana copsenn nanona F 66 05 R O6 0m8 MRIJ 0 000c R 0 0m Fig 48 12 Wait for the end of presentation protocol 13 Stop EEG recording using command Recording gt Stop The signals recorded from sensors are distorted by amplifier and environmental noise To reduce this distortion these signals should average similar of averaging of evoked potentials see WinEEG user manual for more information The appropriate parameters of processing are displayed on Fig 49 Parameters for event related potentials computation E x Groups of trials No Name Labels Corect Incorrect Artifact 1 Image 0 i U 0 2 Sound 2 0 2 0 0 3 Impulse 4 0 U j 0 4 0 T 0 S 0 T U 5 L en 7 0 i T 0 mi 0 T 0 Group differences Choose Artifact processing Synchronization Subject response processing Level fi 00 uv Type G timulus E ndefined Channels Dorit reject 7 Shae ar H pore a eee Thresholds for channels Button channel Mot selected Compression Off Time interval before ma lo Time interval after ma o Calculate statistical significance M Use as default Os 100 Load Save Load from database OF Cancel Fig 49 14 Using vertical marker measure the latency of beginning of test impulse attack corresponding to visual stimuli Image and enter this latency into Visual stimulus field Fig 42
39. ll be displayed at the left top cornet of the screen The unused areas on the screen will be filled by black color There is a difference in work of this property page during creation of new stimuli presentation protocol and during modification of an existing So it is impossible to modify the name of working folder and the name of file of stimuli presentation protocol That is why the corresponding fields are disabled during modification of parameters of existing stimuli presentation protocol af 7 1 2 Modification of list of stimuli The next property page is used for creation and modification of stimulus list Fig 20 Modify task parameters A xX Task Property Stimuli List Trials List Presentation Order Responce Processing TYPE File name Task Image Task bmp BkGr Image BkGr bmp Red Red Text H Green Aled Text He Blue Red Text H3 Red Green Text H4 Green Green Text 5 Blue_Green Text HE Red Blue Text H7 Green Blue Text Ho Blue Blue Text 3 Point Text 10 Modify testual stimuli Add impulze Add from File Add Hew Sound Modify Sound Play Sound Delete OTMeHa jipumenire Lnpasra Fig 20 Textual stimulus list 1s placed at left side of window Additional information about selected stimulus is displayed at the right top corner of window Place mouse pointer to the corresponding name of stimulus and click left button to select stimulus Up Arrow and Down Arrow keys ca
40. ludes single stimulus If the timing parameters of trials are the same there is a possibility to add a list of trials corresponding to list of selected stimuli The next dialog window is used to define the parameters of simple trial Fig 23 Set trials parameters q x Stimuli Duration ma 2000 Start m 200 Exposition ma fod Select all Unselect all 31 In this case used stimuli should be marked The trial duration field Duration and stimuli parameters fields Start and Exposition should be also defined The buttons Select all and Unselect all help to mark stimuli 4 Modify parameters of selected trials button Modify Fig 21 The next dialog window is used to modify the parameters of trials Fig 24 Set modify trial parameters i x Trial name Trial duration m lo Stimulus Start riz Exposition m fo ONL min x x 7 m m 7 7 Fig 24 Only modified parameters of trial should be defined during this procedure Unfilled fields will be ignored 5 Delete selected trials button Delete Fig 21 32 7 1 4 Modification of list of presentation commands The next property page is used for creation and modification of list of presentation commands Fig 25 Modify task parameters x Task Property Stimuli List Trials List Presentation Order Responce Processing Name Dela Label St
41. n be also used for this goal This dialog window allows user 1 Modify the list of textual stimuli button Modify textual stimuli The Change parameters of text stimuli will appear on the screen see chapter Stimuli preparation procedure 2 Add files of stimuli to the list of stimuli button Add from file During this procedure the selected files are copied automatically to work folder and their names are added to the end of stimuli list 28 Generate new sound using build in sound generator button Add New Sound see chapter Stimuli preparation procedure for details The sound will be written to work folder with the sound parameters file Modify selected sound button Modify Sound using build in sound generator This button is enabled if the sound parameters file is available This means that the sounds added from files can be modified Play existing sound button Play Delete list of selected stimuli button Delete The selection of stimuli works very similar to Windows Explorer Modify names of stimuli This function works similar to Windows Explorer PSYTASK will automatically replace some prohibited symbols as space or comma by character 29 7 1 3 Modification of list of trials The next property page is used for creation and modification of trial list Fig 21 Modify task parameters x Task Property Stimuli List Trials List Presenta
42. ncel Fig 33 The commands keywords and syntactic rules of stimuli presentation protocol will be described below 7 2 1 Definition of task name TaskName lt Test Name gt Where TaskName keyword and lt Test Name gt any text Generally this command is placed at the beginning of stimuli presentation protocol 39 7 2 2 Definition of stimuli list The list of Stimuli starts with the keyword StimuliList and ends with the keyword EndStimuli Four types of stimuli are available for the user picture Image acoustic stimulus Sound text Text and testing impulse Impulse The list of stimuli is defined as follows StimuliList Image lt STIM_ID gt lt FileName gt Sound lt STIM ID gt lt FileName gt Text lt STIM ID gt lt TextIndex gt Impulse lt STIM_ID gt 0 EndStimuli where STIM_ID_ the stimulus identifier the letters and digits only FileName the name of file which stores a picture or a sound TextIndex the index beginning from 0 of textual stimulus in the list of textual stimuli The stimuli list is placed at the beginning of stimuli presentation protocol Only one stimuli list can be described in stimuli presentation protocol 7 2 3 Definition of trials list Each trial 1s described separately Its description starts with the keyword Trial and ends with the keyword EndTrial In between these words the stimuli are listed as follows Trial lt TRIAL_ ID gt lt TrialLength gt
43. nt filled circle is randomly presented for 100 milliseconds every 1 1 seconds The subject has to press left button Left Arrow Key in response to presentation of left adjacent circle right button Right Arrow Key right adjacent circle and both buttons Left Arrow Key and Right Arrow Key both circles The total number of trials 1s equal to 300 The parameters of performance are calculated for every condition separately 8 VCPT task The VCPT task is GoNogo task The tree types of visual stimuli are presented in this task pictures with animals pictures with plants and pictures with peoples Stimuli are presented by pairs corresponding to trials There are four different types of pairs Animal Animal Animal Plant Plant Plant and Plant Human Trials are presented at random order with equal probability The duration of stimuli is equal 100 ms Inter stimulus interval in a pair is equal to 1100 ms Interval between trials is equal to 3100 ms Subject has to press a button Right Arrow 62 Key as soon as possible in case of presentation of Animal Animal pairs and ignore other pairs of stimuli The total number of trials is equal to 400 The parameters of performance are calculated for every condition separately 9 Mathematical task The Mathematical task is GoNogo task The visual stimuli are presented by pairs corresponding to trials The first stimulus is arithmetical equation the second integer num
44. on protocol is selected correctly PSYTASK automatically create new working folder and copies the file of stimuli presentation protocol and all files of stimuli The name of task will be added also to the end of list of tasks Modify parameters of stimuli presentation protocol using the editor of parameters of stimuli presentation protocol button Modify Modify stimuli presentation protocol using simplest text editor button Edit This command is useful for experienced users preferring to work with text file versus dialog windows This command includes also a simple debugger for finding syntactic errors not a logical in the stimuli presentation protocol Delete any existing stimuli presentation protocol from task list button Delete Change the order of tasks in the task list buttons Up and Down Save the changes in the task list button OK and return to the main dialog window 24 7 1 Editor of parameters of stimuli presentation protocol During both creation new and editing existing stimuli presentation protocol the Modify task parameters dialog window will appear on the screen This dialog window consists of five property pages Presentation order Fig 25 Response processing Fig 31 1 Task properties Fig 18 2 Stimuli list Fig 20 3 Trials list Fig 21 4 5 Using this property pages it is possible to define or modify all parameters of stimuli pr
45. rogram In this case WinEEG program send control and synchronization code and PSYTASK program works automatically 2 Send synchronously with beginning of each trial in this mode PSYTASK send synchronization codes synchronously with beginning of each trial one code for each trial 3 Send synchronously with first stimulus onset in this mode PSYTASK send synchronization codes synchronously with first stimulus onset of each trial one code for each trial 4 Send synchronously with each stimulus onset in this mode PSYTASK send synchronization codes synchronously with each stimulus onset of each trial a number of codes being equal to number of stimulus in trial are sent for each trial Attention The last modes are active if PSYTASK works in Master Mode only If PSY TASK works in Slave Mode this parameter is disabled The fields of Correction of synchronization for group are use to define systematically time shift for each type of stimuli to make synchronization of stimuli presentation and EEG recording more exact Attention This correction should be done by well trained service engineer Attention To measure these time shifts the special sensors is necessary such as photodiode and sound signals detector Attention Do not modify the values of these fields if this is not necessary The default values zeros are appropriate enough for many goals and for many different computers Attention Fill
46. rs and another program that is able to detect synchronization codes PSYTASK program have a users friendly interface that provide a possibility to design psychological tasks PSYTASK program measures the reaction time and task performance parameters omission and commission errors and save them to build in database for the future analysis and final report preparation Minimal IBM PC specification The time limitations of PSYTASK program strongly depend on parameters of computer its CPU speed total amount of RAM speed of hard disk and video card It is difficult to say definitely when these limitations will be critical That is why we recommend you to test the performance of PSYTASK for each new designed task The PSYTASK was tested on the computer with the specification presented below and its performance was measured The results were rather good Pentium IV 2000 256 Mb S 80 Gb 7200 ATA 100 Video Card SVGA 64 Mb AGP with graphics accelerator GF2MX400 Sound Card Creative Labs SB Live 5 1 MS Windows XP and DirectX 9 0 3 PSYTASK Installation To install PSYTASK program 1 Insert the CD to the corresponding drive 2 Open folder with name PSYTASK 3 Run SETUP EXE program 4 Follow the instructions on the screen Welcome to the Psytask Setup program This program will install Psytask on your computer kis strongly recommended that you esit all Windows programs before running this Setup program
47. s interval in a pair is equal to 1000 ms Two different pairs of stimuli are presented only Top Top pair Go trial and Top Bottom pair Nogo trial Trials are presented at random order with 50 probability The interval between trials is equal to 1500 ms Subject has to press a button Right Arrow Key as soon as possible in case of presentation of the Top Top pair and ignore Top Bottom pairs of stimuli The total number of trials is equal to 480 The parameters of performance are calculated for Go and Nogo condition 6 Auditory GONogo task One of two easily discriminated auditory stimuli the low frequency tone 1000 Hz and high frequency tone 1300 Hz is randomly presented for 100 milliseconds Stimuli are presented by pairs corresponding to trials Inter stimulus interval in a pair is equal to 1000 ms Two different pairs of stimuli are presented only Low Low pair Go trial and Low High pair Nogo trial Trials are presented at random order with 50 probability The interval between trials 1s equal to 1500 ms Subject has to press a button Right Arrow Key as soon as possible in case of presentation of Low Low pair and ignore Low High pairs of stimuli The total number of trials is equal to 480 The parameters of performance are calculated for Go and Nogo condition 7 Left Right task The three different stimuli left adjacent filled circle right adjacent filled circle and both left and right adjace
48. solution Use Text alignment controls to select appropriate position of text inside the output rectangle 22 7 Preparation of stimuli presentation protocols The build in editor of stimuli presentation protocol can be used for creating new protocol editing and deleting any existing protocol To open the build in editor of stimuli presentation protocol press Display List of Tasks button Fig 16 CI x Start New Task Display Database switch to Slave Mode Setup Database Modify Synchronisation Parameters Change I0 port for test signal Change language Guit Fig 16 The List of Tasks will appear on the screen Fig 17 23 Ix GoNogo Audio GoNogo Visual Add from Modify Pattern 10 min IALA Edit Pattern 10 min LA Delete Pattern 15 min ALA Pattern 15 min A Pattern 15 min LR Pattern 20 min ALA Pattern 20 min A rE RRERE Pattern 20 min LF Jp Pattern 25 min ALA Pattern 25 min 4 Down Pattern 25 min LR Pattern 30 min ALA This dialog window allows to user l Create a new stimuli presentation protocol button New Editor of parameters of stimuli presentation protocol will appear on the screen Add any existing stimuli presentation protocol to the list of tasks button Add from During this procedure user should select a file of stimuli presentation protocol using a standard File Dialog Box If the file of stimuli presentati
49. sults of investigation working with database To display results press button Display Database in the main dialog window Fig 36 x Start Mew Task Display Database Switch to Slave Mode Setup Database Modify Synchronization Parameters Change IO port for test signal Change language Guit Fig 36 The next dialog window will appear on the screen Fig 37 45 Detpog 20092005 10 04 2005 17 21 21 EAH0E 17709 2004 20 01 09 Tova IBaHOB 17709 2004 19 54 53 Tova 1709 2004 19 45 29 Lett Right Tas 1409 2004 12 41 00 Tova 14 09 2004 1232 10 Tova 13709 2004 19 31 49 13709 2004 18 12 50 13709 2004 17 36 58 13 09 2004 17 22 00 q4 0AA 1R 1a ae H Task name Tova Date 20 09 2005 Time 11 11 46 Subject name Merpos Date of birth Sex Mo Mote Condition Total Omission _ Commission ATI AT2 sen SHORT l 43 3 0 0 Ari T 17 0 ee 0 0 0 0 0 0 0 Go 1 half 4 43 3 0 0 Ay T 17 T NoGo 1 half 16 0 0 0 0 0 T 0 0 Go 2 halt 0 0 0 0 0 0 0 NoGo 2 half T 0 0 0 0 T T U j Gofl qua 4 343 0 0 Ari O 17 0 NoGa 1 qua 16 0 0 0 0 0 0 0 Number of records 24 5 elected fie Cancel E dit Find Delete Report Fig 37 The list investigations are located in the upper part of the dialog window Use Arrow Up Arrow Down Page Up Page Down Home End or mouse to select an appropriate item from the list The subject s card
50. ted which the reaction time will be calculated MIN_LAT minimal permissible latency of subject response in milliseconds MAN_LAT maximal permissible latency of subject response in milliseconds KEY1 keyword that defines a mouse button or keyboard key that is used as a hot key for the first response TYPE1 keyword that defines a type first response KEY2 keyword that defines a mouse button or keyboard key that is used as a hot key for the second response TY PE2 keyword that defines a type second response lt LABI1 gt lt LAB2 gt list of digital labels The labels should be entered using Space The next keywords are defined for mouse button or keyboard key None not used VK_SPACE Space Bar VK_LEFT Left Arrow VK_UP Up Arrow VK_RIGHT Right Arrow VK_DOWN Down Arrow MOUSE_LEFT Left Mouse Button MOUSE_RIGHT Right Mouse Button The next keywords are defined for type of subject response None not used Press press a button Skip ignore 42 7 3 Optimization of the stimuli presentation protocol These recommendations can be helpful to optimize the performance of stimuli presentation protocol l Switching of a video mode takes a lot of time one or more seconds That is why it is strong recommended to place Wait command at the beginning of stimuli presentation protocol Otherwise the first visual stimulus can be
51. the task is to press only one button the reaction time its standard deviation percent of omission errors and percent of commission errors will be calculated If the task is to press two buttons simultaneously the reaction time its standard deviation will be calculated for both buttons separately The percent of omission errors and percent of commission errors will be calculated If the task is to ignore the trial the percent of commission errors will be calculated Change parameters of subject response processing command button Modify Fig 31 The same window as described above will be used for this goal Fig 32 Delete selected subject response processing command from list button Delete Fig 31 38 7 2 Editing of stimuli presentation protocol manually In order to edit text of stimuli presentation protocol using simple text editor press the button Edit of List of Task dialog window Fig 17 The next dialog window will be displayed on the screen Fig 33 GoNogo isual xX TaskName GoNogo Visual StirnuliList Image Task Task bmp Image BkGr BkGr bmp Image Down Down bmp Image Up Up bmp E ndS tir Trial UU 2400 Up 300 100 Up 1300 100 EndT rial Trial UD 2400 Up 300 100 Down 1300 100 EndT rial PsyT est SO0K6008T rueColor FitT oP age ShowPicture Task SetBackground BkGr Wait 2000 UO 100 2 UO 100 2 UO 100 2 UL 100 2 UD 100 1 UD 100 1 LO 1001 a Save Ca
52. tion Order Responce Processing Trial Stimuli List Hi 1200 ms Up 200 100 1200 ms Down 200 100 Add Complex Add Simple Modify Delete Cancel Apply Help Fig 21 This dialog window allows user to 1 Look at description of each trial and select list of trials The selection of trials works very similar to Windows Explorer 2 Modify names of trials the name of trial can include letters and digits only This function works similar to Windows Explorer PSYTASK will automatically replace some prohibited symbols as space or comma by character _ 3 Add new trial buttons Add Complex and Add simple Fig 21 The complex trial is a trial that includes more then one stimulus The next dialog window is used to define the parameters of complex trial Fig 22 30 Set modify trial parameters x Trial name NoGo Trial duration m 2000 Stimulus Start ris Exposition m 300 100 a Down 1200 o fo a 4 Z m Fig 22 The next set of parameters should be defined for complex trial name field Trial name letters and digits only duration in milliseconds field Trial duration and the parameters of each stimulus Each stimulus in the trial is described by its name selected from a list offset from a beginning of trial to the stimulus onset and stimulus exposition in milliseconds The simple trial inc
53. ual stimuli a coloured square containing a small square adjacent to either the top or bottom edge is randomly presented for 100 milliseconds every 2 seconds The stimulus with the inner square adjacent to the top edge is the designed target Subject is instructed to press a button Right Arrow Key every time they see this stimulus The target is presented on 20 of the trials during the task The total number of presented stimuli 1s equal to 500 The parameters of performance are calculated for target standard stimulus and non target deviant stimulus separately 4 Auditory Odd Ball task P300 One of two easily discriminated auditory stimuli the low frequency tone 1000 Hz and high frequency tone 1300 Hz is randomly presented for 100 milliseconds every 2 seconds The stimulus with high frequency tone is the designed target Subject is instructed to press a button 61 Right Arrow Key every time they hear this stimulus The target is presented on 20 of the trials during the task The total number of presented stimuli 1s equal to 500 The parameters of performance are calculated for target standard stimulus and non target deviant stimulus separately 5 Visual GONogo task One of two easily discriminated visual stimuli a coloured square containing a small square adjacent to either the top or bottom edge is presented for 100 milliseconds Stimuli are presented by pairs corresponding to trials Inter stimulu
54. und keyword that define the beginning of Set background picture command 41 lt STIM_ID gt the stimulus identifier the letters and digits only Wait keyword that define the beginning of Wait delay command lt Delay gt time interval in milliseconds lt TRIAL_ID gt the trial identifier the letters and digits only lt AfterTrialDelay gt interval from the end of the given trial till the beginning of the next trial in ms lt TrialLabel gt label of the trial which is further used to determine the group of trials These labels should conventionally identify the category of stimulus or category of the subject s response for example standard and deviant stimuli in the Odd Ball task 7 2 5 Subject response processing commands list definition The list of subject response processing commands starts with the keyword ResponseProcessing and ends with the keyword EndProcessing In between these words subject response processing commands are listed as follows ResponseProcessing lt Name gt lt STIM gt lt MIN LAT gt lt MAX LAT gt lt KEY1 gt lt TYPE1 gt lt KEY2 gt lt TYPE2 gt lt LAB1 gt lt LAB2 gt lt Name gt lt STIM gt lt MIN LAT gt lt MAX LAT gt lt KEY1 gt lt TYPE1 gt lt KEY2 gt lt TYPE2 gt lt LAB1 gt lt LAB2 gt EndProcessing Tne Name name of subject response processing command or name of condition STIM Order number of stimulus in the trial rela
55. used to set the parameters of records used to make selection form the database Unfilled fields are not used If all fields are not filled in all records will be selected Fields Task Name Subject Sex are text fields For each of them the algorithm of comparison finds a part of line substring For example if Subject stores Peter Kugler and if Conditions of Subjects stores just Kugler this record will be selected For Data Time and Date of Birth the limits from to should be set in format day month year DD MM YYYY and hour minute second HH MM SS Each of conditions for subject s search is compared symbol to symbol with the records in the Data Base If single symbol does not meet the whole record is excluded Therefore in the case of incorrect condition set a selection with no selected records is quite possible In this case check the conditions of search carefully 48 The conditions of search are kept unchanged continuously Therefore even after carrying out new investigations the list of selected records could remain empty In this case check the conditions of search or press button Clear for erasing all old conditions of search The button Delete is for calling deleting all selected records in the database Fig 37 The button Report Fig 37 is calling for creating the textual report for currently selected record and put it in the WS Word window The example of report 1s located below FI
56. ve Mode press Esc key on keyboard 10 4 Setup test signal port To select COM port for test signal use Change IO port for test signal command Fig 44 CI x Start Hew Task Display Database Display List of Tasks Switch to Slave Mode Setup Database ieee Ss Se Change IO port for test signal Change language Quit Fig 44 The next dialog window will appear on the screen Fig 45 Port for test signal xX Defne COM port for test signal The pulses will be generated on DTA E rea and ATS lines Fig 45 Select existing and free COM port 55 10 5 Exact tuning of synchronization of stimuli presentation and recording of bioelectrical signals The computers and amplifier should be connected as displays on the next diagram Fig 46 Computer Amplifier Mitsar EEG 201 or Mitsar EEG 202 Mitsar MITSAR EEG 202 AN POWER WinEEG _ USBKEY Power sockets Power cable USB cable Power adapter for medical devices Power cable n e Computer P SY TASK Patient warming button Fig 46 The synchronization of two computers should be performed as described in 10 1 chapter see above The next steps should be done to perform procedure of exact tuning of synchronization of stimuli presentation and signal recording 1 Connect photodiode to the one of inputs on amplifiers box according to the connection diagram Fig 47 Place photodiode
57. want to install clear the components pou do not want to install Components Space Required 13711 K Space Avallable 2096832 F Back Next gt Cancel Fig 4 Select components you want to install x Setup will add program icons to the Program Folder listed below Tou may type a new folder name or select one from the existing Folders list Click Next to continue Program Folders Administrative Tools Antology of Rock BOOK case 4 0 Broderbund Software Brother HL 1 230 Buka Bukashka Cambridge Back Cancel Fig 5 Type a new folder name if you want Press Next button to continue installation Setup Complete Fig 6 Press Finish button to complete Setup Please don t forget to set the correct synchronization parameters if you want to use PSYTASK program together with WinEEG program or other software 4 How to run PSYTASK Main Dialog Window To run PSYTASK find executable file PSYTASK EXE and double click it After that the Main window of PSYTASK program will appear on the screen Fig 7 xl Display Database Display List of Tasks Switch to Slave Mode Setup Database Modify Synchronization Parameters Change I0 port for test signal Change language Quit Fig 7 The Main Window of PSYTASK program is a dialog window Using buttons of Main Window user can perform different commands of PSYTASK program The button Start New Task
58. window allows user to l Look at description of subject response processing commands and select list of these commands The selection of commands works very similar to Windows Explorer 2 Add new subject response processing command button Add Fig 31 The next dialog window is used to define parameters of subject response processing command Fig 32 37 Parameters of responce processing E x Mame Eo Trial labels 2 Stimulus a Minimal latency me 100 Maximal latency m fi nog Type Hot key First responce Press Right Arrow Second responce None Nul Cancel Fig 32 The next parameters should be defined in this dialog window e Name of subject response processing command field Name any text e List of numeric labels field Trial labels The labels should be entered using Space e Ordinal number of stimulus in the trial related to which the reaction time will be calculated usually the last stimulus in the trial button Stimulus e Minimal and maximal permitted latency of subject response in milliseconds fields Minimal latency and Maximal latency e Type of subject response and mouse button or keyboard key fields Type and Hot 99 key It should be emphasized that there are three different types of subject response 1 press one button 2 press two buttons simultaneously and 3 ignore the trial If

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