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. 2015 Dec 18;7:225. doi: 10.3389/fnagi.2015.00225

Figure 1.

Figure 1

Four possible congruency sequences (cC, cI, iC, and iI) are obtained by factorial combination of previous trial (trial n–1) congruency (congruent vs. incongruent) and current trial (trial n) congruency. Depending on the correct response hand (left vs. right), this constellation will require either a repetition (left panel) or alternation (right panel) of the motor response. Combination of previous congruency, current congruency, response sequence, and response hand yields 16 different stimulus arrays. Only eight arrays are displayed here, as the remaining arrays are mirror images.