Tobii Pro T/X series product description
Contents
1. ValidityLeft Gaze PointXRight GazePointY Right CamXRight CamYRight DistanceRight PupilRight ValidityRight DateTimeStamp DateTimeStampStartOffset Timestamps in numbered order Indexes for the fixation points values correspond to the order of the fixation Gaze PointX can be the horizontal screen position for either eye or the average for both eyes The value to show here is specified in Tobii Studio This value is also used for the fixation definition GazePointY can be the horizontal screen position for either eye or the average for both eyes The value to show here is specified in Tobii Studio This value is also used for the fixation definition Events automatic and logged will show up under Events The automatic events are start and end events for the different media mouse clicks and key presses The automatic events are listed in the event table under Event Key and Data The logged events are the manually logged events entered either in the replay view or from the remote logger Unique event key is shown for different key presses Data field for the event The contents of this field vary depending on what type of event this is Data field for the event The contents of this field vary depending on what type of event this is Description of the event The contents vary depending on what type of event this is The file name of the media given in the setup in Tobii Studio Media size in pixels Media size in pixels D2. 50 80 cm 35 degrees 25 cm second maximum 33 ms maximum 8 ms typical 300 ms X60 X120 60 Hz typical 0 5 degrees typical 0 1 degrees typical 0 2 degrees typical 0 2 degrees 44 22 cm at 70 cm 50 80 cm 35 degrees 25 cm second maximum 33 ms maximum 17 ms typical 300 ms 3kg 7 lbs both bright and dark pupil tracking Embedded Power LAN Tobii X Series Eye Trackers Models Data rate Accuracy Drift Spatial resolution Head movement error Head movement box width x hight Tracking distance Max gaze angles Top head motion speed Latency Blink tracking recovery Time to tracking recovery Weight excluding case Eye tracking technique Eye tracking server Screen size Screen resolution Max Display colors Vertical sync frequency Horizontal sync frequency TFT response time User camera Speakers Connectors Average values over the screen measured at a distance of 63 cm in a controlled office environment The Tobii X120 Eye Tracker can be run in 60 or 120 Hz mode The Tobii X60 amp X120 Eye Trackers allows you to experience how people look at physical objects orscenes The Tobii X60 and X120 Eye Trackers are stand alone eye tracking units designed for eye tracking stud ies relative to any surface They enable a variety of stimuli setups such as a TV or other displays a projec tion screen or a physical object or scene They are our most flexible eye trackers recommended for studies
3. Monitor TV and Screen projection The Tobii X120 Eye Tracker allows for eye tracking using multiple stimuli types such as TV monitor and projection screen In the drawing a monitor is shown but it can be replaced by a TV or projection screen as long as the input comes from the computer To record the participant s reactions and the conversation between the test leader and test participant as well as using think aloud you need to connect an external user camera and microphone to the computer running Tobii Studio The setups below do not include the user camera and user sound To use the user camera and sound option or the Live Viewer in Tobii Studio a Professional or Enterprise edition of the software is required Monitor TV setup Primary Screen Stimulus presentation VGA DVI out Screen computer with a VGA Live viewer DVI dual Optional aa output card 15 Screen projection setup Primary Screen Stimulus presentation VGA DVI out Secondary Tobii Studio computer Screen ith a VGA Live viewer DVI dual d Optional oo output card Physical objects and scene camera setup The scene camera setup is suitable when using a Tobii X120 Eye Tracker for recording and analysis of eye tracking data when the stimulus is a physical object for instance an object on a table or a PDA Please refer to the Tobii X120 Eye Tracker User Manual for precise configuring of the geometry in a Tobii X120 Ey
4. studies Clinical applications Human factors research Eye based computer interaction and much more Basic Operating Principles During tracking the Tobii eye tracker uses infrared diodes to generate reflection patterns on the corneas of the users eyes These reflection patterns together with other visual information about the person are collected by image sensors Sophisticated image processing algorithms identify relevant features including the eyes and the corneal reflection patterns Complex mathematics is used to calculate the three dimensional position of each eyeball and finally the gaze point on the screen that is where the user is looking Description Introduction Tobii T X series Eye Trackers Advantages of the Tobii Plug and Play Eye Trackers The quick and easy setup procedure makes Tobii eye trackers an extremely time saving and cost efficient platform for eye tracking studies No manual adjustments are required and no additional software needs to be installed No highly trained operator needs to be present during testing No requirements for specialized hardware so that most desktop and laptop computers can be used This simplifies setup and installation and enables highly portable solutions Please note that some software applications used with Tobii eye trackers such as Tobii Studio might require a high performance computer to manage heavy media processing The calibration procedure involves having
5. where an illuminator is placed close to the optical axis of the imaging device and causes the pupil to appear lit up this is the same phenomenon that causes red eyes in photos And 2 Dark pupil eye tracking where the illuminator is placed away from the optical axis causing the pupil to appear black Gaze data calculations are performed by firmware embedded in the eye tracker Different applications can be connected as clients to the eye tracker system over a LAN connector to gather eye gaze data and other data in real time and to perform calibrations and other actions Description Data rate Accuracy Drift Spatial resolution Head movement error Head movement box Tracking distance Max gaze angles Top head motion speed Latency Blink tracking recovery Time to tracking recovery Eye tracking technique Eye tracking server Tobii T X series Eye Trackers Eye tracker data output Different applications can be connected as clients to the eye tracker system over TCP IP LAN connector to gather eye gaze data in real time and to perform calibrations and other actions Examples of applications that can be used together with the eye tracker include the Tobii Studio analysis software third party analysis products such as E Prime or your own custom written software for analysis gaze contingent applications or eye control applications For more information on how to create your own applications please refer to t
6. Accuracy Drift Spatial resolution Head movement error Head movement box width x hight Tracking distance Max gaze angles Top head motion speed Latency Blink tracking recovery Time to tracking recovery Weight excluding case Eye tracking technique Eye tracking server Screen size Screen resolution Max Display colors Vertical sync frequency Horizontal sync frequency TFT response time User camera Speakers Connectors LAN VGA DVI D S Video CVBS video Power User Camera and Audio Average values over the screen measured at a distance of 63 cm in a controlled office environment The Tobii T60 XL Eye Tracker allows you to easily accurately and unobtrusively measure gaze over wide screen stimuli It is easy to transport and set up onsite The Tobii 60 XL is integrated into a high resolution 24 TFT wide screen monitor New technical advancements offer high quality tracking over wide screen gaze angles High screen resolution and the possibility to position respondents close to the screen allow for studying small details and peripheral vision 2 Description 573 mm took 281mm Overall dimensions 579 mm Tobii T X series Eye Trackers X120 120Hz typical 0 5 degrees typical 0 1 degrees typical 0 3 degrees typical 0 2 degrees 30 22 cm at 70 cm
7. Product Tobii Technology Description Tobii series Eye Trackers Tobii Technology Tobil T X series Eye Trackers Table of Contents lt e Overview 4 Application areas 4 Advantages of the Tobii Eye Trackers 5 Plug and Play 5 Excellent tracking quality 5 Natural user environment 6 Technical Specifications 7 Tobii T series Eye Trackers 160 and T120 7 Tobii T series Eye Trackers 160 XL 8 Tobii X series Eye Trackers X60 and X120 9 Glossary technical specifications 10 Eye tracker data output 11 Eye Tracking Setups 13 Tobii series setups 3 Tobii X series setups 15 Advanced setups forl and X series Eye Trackers 16 On Accessories amp Related Products 19 Hardware 19 Software 19 Tobii Studio Gaze Analysis Software 9 e Appendix Features Comparison 20 Declaration of Conformity This equipment has been tested and found to comply with the limits for a Class B digital device pursu ant to part 15 of the FCC Rules and EMC directive 89 336 EEC The product also conforms with the directive 73 23 EEC for low voltage All eye trackers are CE marked indicating conformity with the essential health and safety requirements set out in European Directives The Tobii Eye Trackers are for use in office and home environments Product Description for Tobii T amp X Series Eye Trackers This document contains information proprietary to Tobii Technology AB The content
8. X GazePointY Event EventKey Datat Data2 Descriptor StimuliName MediaWidth MediaHeight MediaPosX MediaPosY MappedFixationPointX MappedFixationPointY FixationDuration Aoilds AoiNames WebGroupImage MappedGazeDataPointX MappedGazeDataPointY MicroSecondTimestamp ValidityCodes T X series Eye Trackers The following chapters describe a number of recommended setup configurations which are suitable for different types of studies Your particular needs may of course differ from these standard configurations but they should give valuable insights in any event More detailed information is available in the Eye Tracker User Manual delivered with the product For specific information about custom configurations or minimum system recommendations please contact your Tobii sales representative or Tobii technical support The minimum recommendations document is available for download at www tobii com T series setups This basic setup is the simplest setup when using on screen stimuli such as images movies web or screen for advertising amp usability testing psychology research reading research etc The pictures below illustrate the single screen setup with the two eye tracker connection alternatives using a USB LAN adapter and a network connection To get a portable lab replace the computer in the setup drawing with a laptop or shuttle computer Option 1 The eye tracker is connecte
9. ation Remote Live Viewer This setup requires Tobii Studio Enterprise version This setup is used when the test should be supervised and or controlled from one or more remote stations It can be a computer in the next room where a supervisor is sitting and a computer connected to a wide screen for remote viewing for customers etc This test setup is suitable when using on screen stimuli such as images movies web or screen for advertising amp usability testing psychology research reading research etc In a lot of studies it is important to see the participants reactions and record the conversation between test leader and test participant as well as using think aloud In this case it is possible to use the built in user camera and connect a microphone to record the participant s image and sound An alternative to using the adapter in the setup drawing is to connect the eye tracker to a local network see more under the single screen setup option To get a portable lab replace the computer in the setup drawing with a laptop or shuttle computer For Tobii Studio more than one remote viewer can be used during the test Description Tobii T X series Eye Trackers Computer with Tobii Studio Logger Enterprise version Tobii Studia Logger Primary Screen Stimulus Computer with Tobii heb presentation Studio Enterprise version Secondary Screen Live viewer Optional ees Sci 0v1 out series setups
10. ble and completely unobtrusive Measure print ads in their real environment and measure how an ad captures attention relative to editorial text and other competing ads T60 XL fits natural size of a magazine and the wide gaze angle makes it possible for the user to sit relatively close to the screen which facilitates reading The high resolution 24 TFT wide screen is imperative for showing readable newspapers and magazine spreads Wide screen facilitates display of shelves and packages High resolution amp accuracy display are crucial for readability of logos and text Greater immersion in any test situation where the stimuli is supposed to model a real world setup Large freedom of head movements T60 XL is an integrated solution for VR studies on 16 9 paradigm intertaces plug amp play portable and completely unobtrusive The X60 allows studies of any real world flat surface or scene Flexible adjustment of the Eye Tracker in relation to the infant if combined with a monitor arm Wide screen stimuli presentation High tolerance to both large and rapid head movements Provides data in 120 Hz data rate Enables studies of real world flat surfaces or scenes Description Appendix I Feature Comparison Use the following guide to determine which Tobii eye tracker to use for your application area X60 T120 T60 XL X X T60 X Application area Psychology and media studies with movies or imag
11. ch For further information please refer to the Tobii Studio product description A short overview is also pro vided below Integration package with E Prime experimental software In depth integration between Tobii eye trackers and E Prime experimental software allow for complex stimulus setup Please enquire for more information Tobii Studio Gaze Analysis Software Tobii Studio by Tobii Technology offers a comprehensive platform for recording and analysis of eye gaze data facilitating interpretation of human behavior consumer responses and physiology It com bines easy preparation of test procedures with powerful high level data analysis and striking visualiza tions and statistics Tobii Studio is ideal for evaluating interactive media such as websites software email campaigns computer games interactive TV as well as print and online advertising TV commercials shopping shelves and physical products Scientitic research use includes psychological response studies infant research reading studies and studies of autism ADHD and vision deficiencies For more information about Tobii Studio please refer to the Tobii Studio product description Tobii Studio 19 Accessories amp Related Products X120 Features Integrated TFT monitor easy to set up portable and completely unobtrusive user experience Integrated TFT monitor representative of the users ecological environment easy to set up porta
12. d via USB LAN adapter Primary Screen Stimulus presentation VGA DVI out Tobii Studio computer Option 2 The eye tracker is connected via a local network Primary Screen Stimulus presentation VGA DVI out Tobii Studio computer 13 Eye Tracking Setups Local Live Viewer This setup requires Tobii Studio Professional or Enterprise version The setup below is used when the test is to be supervised trom a screen next to the eye tracker setup This test setup is suitable when using on screen stimuli such as images movies web or screen for advertising amp usability testing psychology research reading research etc In a lot of studies it is important to see the participants reactions and record the conversation between test leader and test participant as well as using think aloud In this case it is possible to use the built in user camera and connect a microphone to record the participant s image and sound An alternative to using the adapter in the setup drawing is to connect the eye tracker to a local network see more under the single screen setup option To get a portable lab replace the computer in the setup drawing with a laptop or shuttle computer Primary Screen Stimulus presentation VGA DVI out Secondary Screen Live viewer Optional Note The eye tracker can be connected directly to the Network instead of using the USB Adapter See the single screen setup for more inform
13. e Tracker setup Scene camera setup Primary Screen Live viewer Advanced setups for T and X series Eye Trackers External video stimulus recording This setup is suitable when using a Tobii Eye Tracking system for analysis of eye tracking data when the stimulus is presented from a separate computer or some other type of RGB or VGA source This could for instance be when doing usability testing on a computer game or even when stimulus is presented on a computer running a different operating system such as OSX Linux or Solaris Description Tobii series Eye Trackers Please note that if the external application runs under Windows operating system and does not make use of 3D graphics acceleration it may be more suitable and less complex to instead run this on the same computer as Tobii Studio and use the Screen Recording option in Tobii Studio For this setup the image trom the Tobii Studio computer has to displayed on the Tobii T60 Eye Tracker display during calibration to display the calibration points whereas the external stimulus computer should be shown on the Tobii Eye Tracker display during the actual test Therefore both computers have to be connected to the Tobii T60 Eye Tracker To switch between the inputs press the source button on the Tobii T60 Eye Tracker front The video shown on the eye tracker display also has to be sent to Tobii Studio to record the video stream and synchronize it with the gaze data If t
14. e from the sensor The distances to the sensor within which the eye tracker is able to detect at least one of the eyes Maximum gaze angle that the eye tracker can detect at least one pupil The angle is calculated trom the centre of the sensor The maximum speed that a user can move the head at which the eye tracker is able to still find at least one pupil Is calculated from the time when an image was shot to when a valid gaze point is delivered to an eye tracking application This measure is affected both by sensor hardware and by the computation of the eye tracking software algorithms Since the timestamp is set at exposure such delay does not affect the accuracy of the timestamp Blinking is the involuntary act of shutting and opening the eyelids During each blink the eyelid blocks the pupil and cornea trom the illuminator resulting in missing eye position data points This measure represents the typical time the eye tracker takes to resume tracking when the eyelids are open again During an eye blink tracking recovery is almost instantaneous An eye tracker working in a natural user environment may occasionally loses track of the eyes of the user for example when the user completely turns away from the tracker This measure represents the typical time from complete tracking failure to when the eye tracker finds the eyes again The Tobii Eye Trackers use two different techniques to determine eye position 1 Bright pupil eye tracking
15. e mounting arm calibration board and video capture card can be provided to capture video of a scene when using Tobii X120 Eye Tracker in real world setups The calibration board is a grid of dots that can be used for calibration procedures in such scenes A monitor arm for Tobii T60 XL Eye Tracker and 60 120 Eye Tracker can be used for flexible position ing of the eye tracker relative to the user The arm can be provided either with a wall mount or a desk mount For more detailed information visit www tobii com or enquire your local sales representative Software Tobii Software Development Kit SDK The Tobii SDK enables the development of application software for controlling and retrieving data from the Tobii Eye Trackers This is useful for highly customized experimental routines as well as many varieties of interaction applications based on eye tracking The SDK provides interfaces on different levels which are suitable for different kinds of applications ranging trom low level interfaces with high level of customization to high level interfaces which require a minimum of programming effort Well documented code samples provide a straight forward introduc tion to the functionality ofthe SDK The SDK is aimed at developers that do not necessarily need alot of programming experience Just the basics Tobii Studio Gaze Analysis Software Provides sophisticated analysis tools for usability tests psychology studies and market resear
16. er trackers calibration quality deteriorates after only a few minutes and constant recalibrations are therefore required on such systems Description Freedom of head movement Integrated hardware Long lasting calibrations T X series Eye Trackers T120 120Hz typical 0 5 degrees typical 0 1 degrees typical 0 3 degrees typical 0 2 degrees 30 22 cm at 70 cm 50 80 cm 35 degrees 25 cm second maximum 33 ms maximum 8 ms typical 300 ms T60 T120 60 Hz typical 0 5 degrees typical 0 1 degrees typical 0 2 degrees typical 0 2 degrees 44 22 cm at 70 cm 50 80 cm 35 degrees 25 cm second maximum 33 ms maximum 17 ms typical 300 ms Tobii T Series Eye Trackers Models Data rate Accuracy Drift Spatial resolution Head movement error Head movement box width x hight Tracking distance Max gaze angles Top head motion speed Latency Blink tracking recovery Time to tracking recovery 9 kg 19 8 lbs both bright and dark pupil tracking Embedded 17 TFT 1280 x 1024 pixels 16 7 M true 8 bit 56 75 Hz 30 60 kHz 4 ms Built in frame rate 640 x 480 30 fps Built in 2 4W power Weight excluding case Eye tracking technique Eye tracking server Screen size Screen resolution Max Display colors Vertical sync frequency Horizontal sync frequency TFT response time User camera Speakers Connectors LAN VGA DVI D Power User Camera and Audio Average valu
17. es as stimuli HCI research web and software usability studies Newspaper and magazine ad testing Studies of store shelves packaging and virtual shopping environments Virtual reality environments human factors research Studies of infants and children Studies of preferential looking and peripheral vision Eye based computer interaction Studies that require finer gaze data detail related to neurological processes such as medical vision and reading research Studies where stimuli are presented on a projection screen TV or stimuli that include real world physical objects 20 yuud ONJ 019066 UoNduoseqyonpoiysaliesx UOduoseqyanpold qo tobii www tobii com CENTRAL EUROPE Tobii Technology GmbH Niedenau 45 D 60325 Frankfurt am Main Germany 49 69 24 75 03 40 Phone 49 69 24 75 03 429 Fax sales de tobii com ASIA Tobii Technology Ltd 3 4 13 Takanawa Minato ku Tokyo 108 0074 Japan 81 3 5793 3316 Phone 81 3 5793 3317 Fax sales jp tobii com NORTH AMERICA Tobii Technology Inc 510 N Washington Street Suite 200 Falls Church VA 22046 USA 1 703 738 1300 Phone 1 888 898 6244 Phone 1 703 738 1313 Fax sales us tobii com Tobii Sales EMEA Tobii Technology AB Karisrovagen 20 SE 18253 Danderyd Sweden 46 8 663 69 90 Phone 46 8 30 14 00 Fax sales tobli com
18. es over the screen measured at a distance of 63 cm in a controlled office environment The Tobii T120 Eye Tracker can be run in 60 or 120 Hz mode The Tobii T60 amp T120 Eye Trackers allows you to set up an eye tracking session in minutes on any desktop or laptop computer Achieve objective results time and cost efficiently without need for expertise The Tobii T60 and T120 Eye Trackers are integrated into a 17 TFT monitor They are ideal for all forms of eye tracking studies with stimuli that can be presented on a screen Get objective results testing print ads TV commercials shopping shelves packaging and product design Research usability of web soft ware and computer games Perform psychology studies infant studies reading studies vision research and more Technical Specifications Overall dimensions 395 mm tobii 485 mm Ur 215mm T60 XL 60 Hz typical 0 5 degrees typical 0 1 degrees typical 0 35 degrees typical 0 2 degrees 44 22 cmat 70 cm 50 80 cm 42 degrees 25 cm second maximum 33 ms maximum 17 ms typical 300 ms 13 kg 29 lbs both bright and dark pupil tracking Embedded 24 TFT 1080p 1920 x 1200 pixels 16 7 M true 8 bit 46 63 Hz 69 78 5 kHz 4 ms Built in frame rate 640 x 480 30 fps Built in 2 4W power Tobii T Series Eye Trackers Model Data rate
19. he Tobii Software Development Kit SDK product description Below you can find a list of all data that can be accessed through the output of the eye tracker In Tobii Studio analysis software this data can be accessed through a Raw data text export function and easily imported into a spreadsheet for further analysis Timestamp in milliseconds for when the gaze data was collected Horizontal screen position of the gaze point for the left eye Vertical screen position of the gaze point for the left eye Horizontal location of the left pupil in the camera image O is left edge 1 is right edge Vertical location of the left pupil in the camera image O is top 1 is bottom Distance from the eye tracker to the left eye The distance is given in mm a straight axis right out from the eye tracker plane Size of the pupil left eye in mm The distance and pupil size measures are calculated to be as close to real values as possible However individual differences in the eyes of subjects and the strength of glasses contact lenses will cause errors in these values The measures still reflect changes in head position and pupil size accurately Validity of the gaze data The validity is O if the eye is found and the tracking quality good If the eye cannot be found by the eye tracker the validity code will be 4 Read more under the Validity codes section further down The horizontal screen position of the gaze point for the right eye Vertica
20. he stimulus is presented from an analogue video source for instance a VCR or an analogue video camera it is possible to use a similar setup with slightly moditied components Basic setup Stimulus presentation re Tobii Studio External computer VGA out computer with a dual or device with dual VGA DVI output card VGA DVI output video capture card DVI out Secondary Screen Live viewer Optional Tobii X series External Player setup DVD player Set top box gaming console etc Optional TV Primary Screen Stimulus presentation VGA DVI capture Secondary Screen Live viewer Optional Tobii Studio computer with a VGA DVI video output VGA DVI video capture card 17 Description Tobii E Prime integration setup E Prime is aleading software package for designing and conducting psychological experiments available from Psychology Software Tools There is an extensive package called E Prime extensions for Tobii for integrating the E Prime software with the Tobii eye tracking system This enables you to use E Prime and E Basic to design sophisticated stimulus for instance to create gaze contingent conditional and counter balanced experiments The Tobii extensions for E Prime offer 8 set of native E Prime objects tailored for the Tobii eye tracking system These offer functions on two different levels TET level In this mode E Prime controls the Tobii Eye Tracke
21. ider range of the population Extraordinarily high accuracy provides reliable and precise results about the gaze position of the user Excellent compensation for head movements and long time drift effects also allow for a truly natural user environment Tobii eye trackers track both eyes simultaneously and automatically determines which eye is left and which is right regardless of head pose and blinking Binocular tracking enables more robust tolerance to head motion since tracking continues even if one eye is hidden from the field of view of the tracker It also makes calibrations last longer as parts of long time drift effects are inversely symmetrical between the eyes and can be averaged out The eye trackers provide a built in real time tracking status meter as well as numerical validity measures for each gaze data point which indicates the correctness of the data recorded Being able to verify the validity of each data point provides the basis for filtering out corrupt data points which ensures quality data The 120 Hz trackers T120 and X120 Eye Trackers offer more fine grained gaze data for studies of neurological processes where a higher quantity of detailed measurements is valuable 100 automatic tracking Works with standard computers Very quick and fully automatic calibration procedure Powerful and easily managed programming interfaces and application software Exceptional tracking ability Automatic tracking optim
22. ii 60 amp T120 Eye Trackers The Tobii T60 and T120 Eye Trackers are integrated into a 17 TFT monitor They are ideal for all forms of eye tracking studies with stimuli that can be presented on a screen ranging from market research and usability studies to psychology studies infant studies reading studies vision research and more Tobii T60 XL Eye Tracker The Tobii 60 XL is integrated into a high resolution 24 TFT wide screen monitor for large stimuli display New technical advancements offer high quality tracking over wide screen gaze angles High screen resolution and the possibility to position respondents close to the screen allow for studying small details and peripheral vision Tobii X60 amp X120 Eye Trackers The Tobii X60 and X120 Eye Trackers are standalone eye tracking units designed for eye tracking studies relative to any surface They enable a variety of stimuli setups such as a TV or other displays a projection screen or a physical object or a scene They are our most flexible eye trackers recommended for studies that require particular stimuli setups Application areas Examples of applications where Tobii eye trackers are clearly suitable are Web and software usability studies Web TV print advertisement testing Studies of store shelves packaging and virtual shopping environments Psychological studies Studies of reading and dyslexia Studies of infants and children Visual perception research Low vision
23. istance from the left side of the screen to the media on the screen given in pixels Distance from the top of the screen to the media on the screen given in pixels X coordinate for the fixation point mapped to the media coordinate system where the origin for the coordinate system is the top left corner of the image media Y coordinate for the fixation point mapped to the media coordinate system where the origin for the coordinate system is the top left corner of the image media Fixation duration The time in milliseconds that a fixation lasts ID number for the AOI usually a counter starting at zero for the first AOI Name of the AOI or AOls if fixations on multiple AOls are to be written on the same row Filename of the image file that is used to visualize the web group X coordinate for the raw gaze data point mapped to the media coordinate system where the origin for the coordinate system is the top left corner of the image media Y coordinate for the raw gaze data point mapped to the media coordinate system where the origin for the coordinate system is the top left corner of the image media Timestamp for this export row in microseconds Validity code for each data point This code is is based on whether the system is able to identity correctly both eyes It is recommended that the validity codes should always be used for data filtering to remove data points that are obviously incorrect Description Number FixationIndex GazePoint
24. ization Very high accuracy Effective binocular tracking Validity measures Natural User Environment The eye trackers tolerate both large and rapid head movement enough to provide an entirely unrestrained user experience Head movements within the range of the tracking box are nearly perfectly compensated for Tracking is resumed instantly when the user moves back into the tracking box This ensures a completely natural and relaxing environment for the subject and provides the most realistic responses to different stimuli As head movement is also very difficult to restrain for longer periods of time the excellent head motion compensation of the Tobii trackers allows for unsurpassed tracking quality over long recording sessions All hardware including user camera and speakers is integrated into the slim casing of a TFT display applies to T60 T120 and T6OXL Eye Trackers The eye tracking technology is practically unnoticeable since no sensors or other hardware elements are visible to distract the user Excellent head motion compensation and other means of drift compensation are obtained due to the sensors being fixed relative to the tracking plane which allows for long lasting calibrations A user only needs to calibrate once and can reuse this calibration over and over again Long lasting calibrations allow for a natural user environment as the user can move around and even go away and come back without recalibrating On many oth
25. l screen position of the gaze point for the right eye Horizontal location of the right pupil in the camera image 0 is left edge 1 is right edge Vertical location of the right pupil in the camera image 0 is top 1 is bottom Distance trom the eye tracker to the right eye The distance is given in mm on a straight axis right out from the eye tracker plane Size of the pupil right eye in mm The distance and pupil size measures are calculated to be as close to real values as possible However individual differences in the eyes of subjects and the strength of glasses contact lenses will cause errors in these values However the measures still reflect changes in head position and pupil size accurately Validity of the gaze data The validity is O if the eye is found and the tracking quality good If the eye cannot be found by the eye tracker the validity code will be 4 The value is for the right eye Read more under the Validity codes section further down Additional data available in the Tobii Studio Raw Data Export Timestamp recalculated using the computer date time shown in hours minutes seconds and milliseconds hh mmi ss ms Timestamp converted into hh mm ss format The start time for the recording is also shown in the Replay and Visualization views in Tobii Studio if the option Show Date is selected in the Recordings field 11 Timestamp Gaze Point K Left GazePointY Left CamXLeft CamY Left DistanceLeft PupilLeft
26. r Server directly without the need for using Tobii Studio at all E Prime performs calibrations collects gaze data and saves this to file Tobii Studio level In this mode E Prime remote controls Tobii Studio Timing is synchronized between E Prime and Tobii Studio data is collected by both E Prime and or Tobii Studio and Tobii Studio can also be used for data visualization and analysis It is recommended to run the E Prime software on a separate computer and have this communicate with the Tobii Eye Tracker Server and Tobii Studio software over TCP IP An RGB capture card may be used to capture a video of the stimulus presented by E Prime into Tobii Studio for visualizations and post recording analysis VGA DVI out VGA DVI splitter VGA DVI out Secondary Screen External computer Optional E Prime computer with dual VGA DVI output Primary Screen Stimulus VGA DVI capture presentation Secondary Screen Studio computer Optional Tobii Studio computer with dual VGA DVI output card video capture card VGA DVI out For more information about E Prime please visit www pstnet com Tobii T X series Eye Trackers Hardware All eye trackers are shipped with sturdy cases that can also be used for subsequent transportation Tobii T60 XL Eye Tracker and T60 120 Eye Tracker cases are by default shipped with wheels and a foldout handle for easy transportation A package with scene camera adjustabl
27. s are confidential and any disclosure to persons other than officers employees agents or subcontractors of the owner or licensee of this document without the prior written consent of Tobii Technology AB is strictly prohibited No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic or mechanical including photocopying and recording without the prior consent of the copyright holder Revision 2 1 June 2010 Tobii Technology AB reserves the right to change the content of this manual without any notice Changes due to typographical errors innacuracies or modifications in programs and or equipment might be implemented at any time Please check the Tobii web site www tobii com for updated versions of this document All rights reserved Tobii Technology AB Overview Tobii T X Series brings revolutionary high performance and user centered design into eye tracking technology making eye tracking studies easily accomplished by anyone The T X Series give twice as accurate eye gaze data and provides an even more natural environment for the subject to ensure realistic responses Since it is fully plug and play the eye tracker can be set up in minutes Time and cost efficient automatic tracking enables eye tracking in much wider areas of application than has ever been possible before This document describes the features and functionality of the following products Tob
28. that require particular setups Overall dimensions 85 mm Glossary technical specifications Number of sampled gaze points per second The Tobiil X series Eye Trackers have 8 stable data rate of 60 Hz or 120Hz that is 60 or 120 gaze data points per second are collected for each eye The typical difference between the Measured Gaze Direction and the Actual Gaze Direction at different parts of the screen for a person positioned at the centre of the eye tracking box This does not include drift effects and compensation errors from larger head movements The accuracy of the Tobii eye trackers varies depending on external conditions such as lighting quality of the calibrations and individual eye characteristics Change in accuracy due to change in lighting The specified value relates to complete inversion of screen color e g trom black to white without recalibration in between The term spatial resolution or noise denotes the frame to frame variation of the measured gaze point Decrease of accuracy at the edges of the eye tracking box as compared to the centre where the calibration was done This includes head translations sideways as well as movement back and forth and up and down The value is an average of the two types of translations Measures the box height width in cm where at least one of the eyes is within the field of view of the eye tracker the present value was measured at 70 cm distanc
29. the system display a number of points on the screen This may involve as few as only two calibration points but will still yield high accuracy across the entire tracking range The calibration also uses automatic filters to select good data points All of this enables very simple and quick calibrations even on difficult subjects such as infants and low vision subjects The Tobii T X Series provides easy to use and powerful programming interfaces using the Tobii Soft ware Development Kit SDK Among other things the kit provides high level COM interfaces with tools for simple development of custom applications Several software packages support Tobii eye trackers including Tobii Studio analysis software E Prime experimental software and Eye Tools usability solution Excellent tracking quality Tobii eye trackers track eye gaze of virtually everyone regardless of ethnic origin age or glasses contacts This eliminates disappointing results from not being able to track a certain individual and enables high efficiency in large studies A very high tolerance to varying light conditions also contrib utes to the outstanding tracking quality During calibration both bright and dark pupil eye tracking methods are used and the most suitable method is chosen automatically With automatic optimization for dark and bright pupil tracking the Tobii T X Series Eye Trackers are able to increase both the tracking quality and the ability to track a w
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