Fig. 2.

Behavioral results. a For low-difficulty blocks, performance was significantly better for “HARD”-labeled than for “EASY”-labeled blocks. b Percent correct responses are plotted for early trials (trials 1–4), middle trials (5–8), and late trials (9–12) within each block, to visualize the time course over which expectations influenced learning. Expectation-related performance differences emerged during the late trials for low-difficulty blocks