Example video that corresponds to the subject's view during the actual experiment.
At random intervals, contrast is briefly incremented in a small patch in one of
four locations two degrees from the current gaze position. Afterwards, a
gaze-contingent red cross comes on as a response prompt. See Video S2 for
additional markers indicating gaze and target position; these markers
were not present during actual experiment.
Note that contrast increments here are much stronger than in the actual experiment and
shown for longer (600 ms instead of 50 ms), and actual stimuli were presented
at higher spatio-temporal resolution (1680 by 1050 pixels, 120 Hz
gaze-contingent refresh rate).
Same video as S1, but gaze position is indicated by a white square
and location of the contrast increment is indicated by a bounding box.
These markers are shown here for demonstration
purposes only and were not present during the actual experiment.
Schematic example video for the passive condition.