The data was presented using custom scripts built with the Psychtoolbox library in Matlab.
An image sequence was presented on the screen incorporating the following phases: Tracked locations revealed/Tracked locations concealed/Outcome (change/no change).
Participants' gaze data and pupil dilation was recorded throughout the experiment (Tobii TX300 using a chin rest)
At the outcome, participants responded via key press whether the outcome of the trial constituted a change in the tracked locations or not.
Participants were instructed to respond as quickly and accurately as possible.
Response times and accuracy were recorded using Matlab.