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Tobii Glasses Eye Tracker
Tobii Glasses Smart IR Workflow
Recordings and participant numbering
Recordings are numbered consecutively according to the order in which they are imported into Tobii Studio. The
Session number from the Recording Assistant is shown under the Participant column (right click>Show>Participant)
in the Recordings overview. Order the recordings by Date to keep them in chronological order.
Variables such as Participant Name, Age, and Gender should be individually changed directly after importing
recordings from a single memory card. Change the variables before importing recordings from another memory
card to avoid having duplicate names (e.g. two times a P001), as the numbering will be of the same format on each
memory card. Independent variables can be changed by selecting Independent Variables from the Tools menu in
the top menu bar in Tobii Studio. Read about Tobii Studio settings such as Independent Variables in the Tobii Studio
Manual.
Segments and Segment Groups
Under the Replay tab you can create Segments as parts of your recordings. Segments can be grouped into Segment
Groups. You can create multiple segments of different recordings and add those to a Segment Group and then you
can further analyze the data of that Segment Group in the Statistics and Visualizations tabs and also use them when
exporting the data in the data export view. This is useful when you want to cut out from your analysis certain portions
of data of the recordings, and use in your analysis only the data Segments that are relevant for your study.
Recordings list can be filtered by Segment Groups in both Visualizations and Statistics tabs, in order to show and
analyze only the data corresponding to that group of selected parts of recordings. Read about Segment Groups in
the Tobii Studio Manual.
Samples percentage and eye tracking quality
Tobii Studio can show the percentage of the total samples (Glasses is a 30Hz eye tracker, which means it takes 30
samples of gaze data per second) that are mapped within the scene camera video/stimulus area. Right click on any
recording and select Show>Samples to show this percentage. This percentage may, but does not necessarily, show
the eye tracking ability/quality: any blink or gaze outside of the scene camera view will be discarded and will result
in a lower total samples percentage, even if all gaze data that is within the view of the scene camera has high eye
tracking ability/quality.
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