Visual Contrast Response Function Program
attachment:VisualResponseContrast
Participants view varying levels of contrast in sine wave gratings presented as dynamic moving images surrounding a central fixation target spotting task (spot a target in a continuous stream of letters).
Parameters
A block design is used to allow for maximal HRF values and return to baseline. Alternate runs of the constant stimulus and adaptive procedure.
4 epis (2 constant and 2 adaptive runs at 2.5 and 6.5 each) Measurements: 780BR TR 1 BR 16 slices BR V1 ROI BR