Fig. 1

Illustration of the stimuli in multiple-source interference task (MSIT). Example congruent (right) and incongruent (left) condition trials. Participants were required to recognize the unique target among three items. In the congruent condition, the spatial position of the unique target matches the correct button-press response (e.g., “1XX” or “100”, the unique target “1” and its response button are both in the 1st position). In the incongruent condition, the spatial position of the unique target is in conflict with its correct button-press response (e.g., in “331”, the unique target “1” is in the 3rd position while its response button is in the 1st position)