The detail valence pairing information of each condition and the mean RTs±standard deviations (ms) as a function of ISI and prime-target congruence condition (overall congruency effect, visual and motor effects) in Experiment 1.

Each of the column headings (e.g., SS, DD, DS, SD) denotes the valence relationship of the two faces, with the first letter denoting the valence relation of the two faces in the prime and the second letter that of the two faces in the target. S represented the same valences between two simultaneously presented face pictures and D represented different valences between two faces. H represented happy facial expression and F represented fearful facial expression. The valences of the two faces in the prime were denoted by the two left letters and those of the target were denoted by the two right letters. The visual features and the response were the same across prime and target in SSs and DDs conditions but the visual features changed in SSc and DDc conditions although the response did not change. The number in parentheses was the number of trials for each pairing condition.