A common mistake is failure to enable an Input Mask. If you encounter the following error message:
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Task 13: Add the TETStopTracking PackageCall to stop tracking
eye movements.
Add a PackageCall to the TrialProc and Name the PackageCall TETStopTracking.
Once the critical stimuli have been presented, it is appropriate to place the TETStopTracking
PackageCall. It is rare that an experimenter would want to collect GazeData on the Feedback object, so a common place for the PackageCall is immediately after the last critical stimulus and prior to the Feedback object, though again this may vary.
1) Drag a new PackageCall
from the Toolbox and drop it after the Stimulus object in the TrialProc procedure. The object will be
given a default name of PackageCall1.
2) Click on the PackageCall1 to select it then press F2 to rename the object.
You may alternatively right click on the object and
select Rename from the context menu.
3) Type “TETStopTracking” as the new object name and then press
Enter to accept the change.
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Task 13 (continued): Add the TETStopTracking PackageCall to stop
tracking eye movements.
Configure the TETStopTracking PackageCall to call the StopTracking routine of the TET package and
accept the defaults.
4) Double click the
TETStopTracking PackageCall object on the TrialProc to display its Property Pages. 5) Select TET from the Package dropdown list.
6) Select StopTracking from the Routine dropdown list. 7) Review the TETStopTracking parameters listed in the Parameters and Description fields.
8) Click the OK button to accept the changes and dismiss the Property Pages.
9) Confirm your TrialProc is identical to the example shown.
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Task 14: Add the TETGazeReplay PackageCall to visually replay the
eye movements.
Add a PackageCall to the TrialProc and Name the PackageCall TETGazeReplay.
The paradigm must be explicitly designed to overlay the gaze replay data, while the stimulus is repeated in the same order it was presented to the participant during the experimental run. It is your responsibility to ensure the stimulus order is accurately synchronized with the gaze replay.
1) Drag a new PackageCall from the Toolbox and drop it after the Feedback object in the TrialProc procedure. The object will be given a default name of PackageCall1.
2) Click on the PackageCall1 to select it then press F2 to rename the object.
You may alternatively right click on the object and
select Rename from the context menu.
3) Type “TETGazeReplay” as the new object name and then press
Enter to accept the change.
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Task 14 (continued): Add the TETGazeReplay PackageCall to
visually replay the eye movements.
Configure the TETGazeReplay PackageCall to call the GazeReplay routine of the TET package and edit
the Parameters.
In the TETFixedPositionAOI experiment, the critical stimulus was presented by the Stimulus object. The parameters indicated for this experiment are such that the Stimulus object is presented on the screen and the eye movements are replayed starting at the time of the Prime object (Prime.OnsetTime), and continuing on until TETStopRecording is called. It is possible to designate a specific time in which the gaze replay should stop, via the last optional parameter. However it is unnecessary in this case because the TETStopTracking PackageCall is called immediately after the offset of the Stimulus object, that supplants the use of the Optional parameters.
4) Double click the
TETGazeReplay PackageCall object on the TrialProc to display its Property Pages. 5) Select TET from the Package dropdown list.
6) Select GazeReplay from the Routine dropdown list. 7) Edit the TETGazeReplay parameters listed in the Parameters to read:
c, Stimulus, Prime.OnsetTime
8) Click the OK button to accept the changes and dismiss the Property Pages.
9) Confirm your TrialProc is
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Task 15: Add the TETCloseGazeDataFile PackageCall to end data
collection.
Add a PackageCall at the end of the SessionProc and Name the object TETCloseGazeDataFile PackageCall.
Now it is appropriate to add the TETCloseGazeDataFile PackageCall because we no longer need to save GazeData during this experiment.
1) Double click the SessionProc object to open it in the workspace. 2) Drag a new PackageCall
from the Toolbox and drop it after the Goodbye object in the
SessionProc procedure. The object will be given a default name of PackageCall1.
3) Click on the PackageCall1 to select it then press F2 to rename the object.
You may alternatively right click on the object and
select Rename from the context menu.
4) Type “TETCloseGazeDataFile” as the new object name and then press Enter to accept the change. 4
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Task 15 (continued): Add the TETCloseGazeDataFile PackageCall to
end data collection.
Configure the TETCloseGazeDataFile PackageCall to call the CloseGazeDataFile routine of the TET package
and accept the default properties.
Designate TET as the package and CloseGazeDataFile as the routine. Accept the default parameters. 5) Double click the
TETCloseGazeDataFile PackageCall object on the SessionProc to display its Property Pages. 6) Select TET from the Package dropdown list.
7) Select CloseGazeDataFile from the Routine dropdown list.
8) Review the TETCloseGazeDataFile parameters listed in the
Parameters and Description fields.
9) Click the OK button to accept the changes and dismiss the Property Pages.
10) Confirm your SessionProc is identical to the example shown.
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Task 16: Add the TETClose PackageCall to close the TET Server.
Add a PackageCall to the SessionProc and Name the PackageCall TETClose.The last necessary PackageCall is TETClose. This call will close the TET device, and should be implemented once eye tracking is no longer necessary in your experiment.
1) Drag a new PackageCall from the Toolbox and drop it after the TETCloseGazeDataFile
PackageCall in the SessionProc procedure. The object will be given a default name of PackageCall1.
2) Click on the PackageCall1 to select it then press F2 to rename the object.
You may alternatively right click on the object and
select Rename from the context menu.
3) Type “TETClose” as the new object name and then press Enter to accept the change.
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Task 16 (continued): Add the TETClose PackageCall to close the
TET Server.
Configure the TETClose PackageCall to call the Close routine of the TET package and accept the default
parameters.
Designate TET as the package and Close as the routine. Accept the default parameters. 4) Double click the
TETClose PackageCall
object on the SessionProc to display its Property Pages. 5) Select TET from the Package dropdown list.
6) Select Close from the Routine dropdown list. 7) Review the TETClose parameters listed in the Parameters and Description fields.
8) Click the OK button to accept the changes and dismiss the Property Pages.
9) Confirm your SessionProc is identical to the example shown. 10) Compare the structure of the experiment you have created to the one on the right.
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