Fig. 2.

(A) Adult and adolescent rats learned to perform an instrumental action for reward following cue presentation. (B) The same cue was shifted to a Pavlovian cue, during which reward was no longer contingent on a response, but was always delivered as the cue terminated. Adolescent rats acquired a Pavlovian response to the cue (defined as time spent in the food trough anticipating reward during the cue) more quickly than adults.