Chapter 6: learning and reward: stimulus generalization occurs when stimuli that are similar nut not identical to the. S heron addicts are exposed to environmental cues associated with drug use experienced craving withdrawal. S tolerance for drug increases when taken at location of previous drug usage . S e. g. rat can easily condition in taste aversion where as bird quickly learn from visual cue: cognitive perspective. S most consider animal is about to predict the occurrence of events. Cs need to be accurate predictor of the us e. g. eye-blink sound cs associated with air blown into eye us needs to blinking. N rescorla wagner model cognitive model of classical condition that states that the strength of the cs-us association is determined by the extent to which the us is unexpected the greater the surprise of the.