Fig. 2. The Concrete Permuted Rule Operations (C-PRO) task paradigm.

Adapted with permission⁸. For a given trial, subjects were presented with a task rule set (context), in which they were presented with three rules sampled from three different rule domains (i.e., logical gating, sensory gating, and motor selection domains). After a delay period, subjects applied the task rule set to two consecutively presented sensory stimuli (simultaneous audiovisual stimuli) and responded accordingly with button presses (index and middle fingers on either hand). We employed a miniblock design, in which for a given task rule set, three stimulus periods were presented separated by an inter-trial interval (1570 ms). See Methods for additional details.