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Possible trial types during scanning. Time between trial events in the scanner was always 1 TR (i.e., 2 s). Time between trial events during pre-screening is described in the text. A: Example RB trial in which the cue, stimulus, and feedback are all presented. B: Example II trial in which the pre-cue is omitted. C: Example II trial in which feedback is omitted. D: Example RB trial in which pre-cue and feedback are omitted.
