Behavioral paradigms of multistep actions for rewards in monkeys. (A) Sequence of events during the multistep choice task. (B) Schematically illustrated structure of the three-step choice trials to obtain three rewards at different times. (C) Average correct choice rates (mean and SD, 29 d in monkey SK and 35 d in monkey CC, during the advanced stage of learning) against five types of three-step choice trials (N1, N2, N3, R1, and R2) in two monkeys.