Learning to become an expert: reinforcement learning and the acquisition of perceptual expertise

sensitive to processing of feedback) elicited over the frontalcentral region.Only the high learners learned to identify the learnable blobs that resulted in increase in the amplitudes of N250.Most importantly, with more training, the high learners developed the ability to evaluate the correctness of their responses while being less dependent on the external feedback.This was reflected as increase in amplitude of response ERN that preceded the enhancement of N250.In addition, there was a corresponding decrease in feedback ERN.The results suggested that the improvement in the categorization task was preceded by enhancement in the ability to evaluate the correctness of one's responses which reduced the dependence on any external feedback.Interestingly, no such effect was observed for the morph blobs.