Fig. 8.

Familiarity of trained stimuli correlates with performance on probe trials. A: the difference between speed of multiunit adaptation to GO and NoGO stimuli (difference in familiarity) trended toward correlation with behavioral responses to probe trials. Slower adaptation to GO stimuli (indicating familiarity) appears as a positive value on the x-axis. Subjects that were more familiar with (adapted to more slowly) GO stimuli responded more often to unreinforced probe stimuli as GO stimuli, and vice versa for NoGO stimuli [r₍₄₎ = 0.8957, P = 0.104]. B: in addition, there was a trend for the animals that learned more quickly to respond to the probe stimuli as NoGO stimuli, while slower learners responded to probes as GO stimuli [r₍₄₎ = 0.868, P = 0.13].