Summary of individual behavioral profiles of poor and good DM.

Motor impulsivity/perseverative responses correspond to high activity scores in both fixed-interval (FI) and extinction (EXT) schedules of reinforcement. Risk taking is indicated by a short latency to emerge and a low number of risk assessment in the dark-light box test, reward seeking by a short latency to collect food in the RGT, and inflexibility by performance in the RGT reversed condition. A cross indicates a high score (with respect to the median) for a given parameter. Last line shows the total number of high scores displayed by each rat. Proportions of subjects demonstrating high score in each group are also given. Mis. : missing value.