Fig. 1.

An illustration of two representative trials from the modified Dimensional Change Card Sort task used in the present study. Trials began with an instruction cue indicating the rule on that trial, followed by the presentation of a stimulus to which participants responded, followed by a fixation point. On switch trials, the rule was different than on the previous trial; on repeat trials, the rule was the same as on the previous trial. Individual trials were administered in the form of a block design.