Figure 4.

Controls showing that effect of learning paradigm depends on broader context of sequence of learning instructions. A, Experimental design for delivering instructions with target speeds of 29, 30, or 31 deg/s. B, CS probability versus time for target motion at different speeds. In A and B, traces of different colors show data for different target speeds. C, D, CS probability as a function of the history of direction of instruction for the prior four trials. In C, we selected from the random paradigm sequences of trials that repeat the off-direction target motion for up to four trials. Bar labeled Re shows CS probability in the repeated paradigm, and bars labeled with numbers show CS probability in the random-direction paradigm after sequences of one, two, three, or four instructions of the same direction. In D, we performed the same analysis for sequences of alternating direction instructions during the random direction paradigm.