Figure 4.

Behavioral performance at test on trained and generalization trials for the ‘good’ and ‘poor’ generalization participants. (A) An interaction between group and test trial type revealed a significantly greater difference between the two groups in performance on the generalization trials relative to the trained trials. Importantly, the ‘good’ group showed no difference in accuracy between trained and generalization trials, whereas the ‘poor’ group showed superior performance on trained than on generalization trials. (B) This pattern was also evident in the speed of responding. The ‘poor’ group, relative to the ‘good’ group, showed a marked difference in response latencies to trained vs. generalization trials, consistent with the hypothesis that in the ‘good’ group the associations necessary to rapidly respond to generalization trials were constructed during learning. Error bars +/− S.E.M.