Tobii eyetracking and Eprime Training Course EyeTracKids
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Transcript of Tobii eyetracking and Eprime Training Course EyeTracKids
3/3/2009
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Tobii & Eprime
• Combines EPrime experiment design and control with Studio’s powerful visualizations
• Allows communication between the TET Server of the eye tracker and EPrime software
Tobii / EPrime eye tracking integration
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Tobii / EPrime eye tracking integration
• Dynamically generate, complex and randomly presented stimuli
• Create paradigms which change based on subject eye gaze data, AOI hit tests, fixation, user interaction
• Very accurate timing for measuring response times
HARDWARE SETUPS
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Using Eprime for presentation and for collectingeye movement data
• Eprime is used to present the stimulus and collect eye movement data
• Use the TET package call in Eprime• Use Tobii Studio for calibrating the
subjects before the test• Gaze contingency tests possible• Use only Eprime for analyzing the
data• No visualizations of eye movement
data possible
Using Eprime for presentation and Studio for collecting eye movement data
• Eprime presents the stimulus and Tobii Studio collects the eye movement data.
• Use ClearView package call in Eprime• Use VGA capture card and External video
stimulus in Studio• Events are sent from Eprime to Studio, use
segments and scenes for splitting up the recording
• VGA switch needed to change the source image shown on the eyetracker screen.
• Use Tobii Studio to analyze and visualize eye movement data
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EPRIME
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EPrime modules• EStudio: design and create experiments. Graphical based.
• EBasic: design and create experiments. Script based.
• ERun: converts an EStudio experiment into a script and runs the
experiment.
• EMerge: combines single session data files into a single multisession data
file
• EDataAid: data management application, allows to filter, edit and export
data to an external Statistical package.
• ERecovery: converts an incomplete ERun text file into an Eprime data
file.
EStudio interface
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Eobjects and packages
• Eobjects are instructions that can be dragged onto the procedure timeline
• Packages are sets of Eobjects that are used to interactwith the eye tracker
EPRIME EXTENSIONS SETUP
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EPrime Extensions for Tobii
• Drag and drop Tobii eye tracker objects and stimuli on timeline
TET packagecall control and collect data directly from the eyetracker
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TET packagecall:
• TET Open: tells the eye tracker to start collecting eye movement data• TET TrackStatus: displays the track status window, useful when setting up the
eye tracker.• TET OpenGazeDataFile: creates and opens a tab delimited raw gaze data file
(.gazedata)• TET StartTracking: tells eye tracker to start saving eye tracking data• TET WaitForFixation: halts the experiment until the participant fixates on an object
for a given amount of time in ms.• TET StopTracking: tells the eye tracker to stop collecting eye movement data• TET GazeReplay: replays the scanpath on top of the stimulus• TET CloseGazeDataFile: saves the gaze data file• TET Close: closes the connection to the eye tracker• WriteGazeDataFile: writes a line of data to the GazeData file
ClearView packagecall:
• Init: initializes the connection to Studio• SendGenericEvent: sends a generic event to Studio.
Interpreted as the keypress controlling event logging during recordings
• SendLogEvent: sends an event to Studio for example a response or the stimulus name
• StartRecording: triggers Studio to start recording the test• StopRecording: triggers Studio to end the recording• Uninit closes the connection to Studio