Stimulus‐producing Responses in Chimpanzees1

Recent analyses of discrimination learning have emphasized a distinction be- tween responses which are instrumental in obtaining food and responses which re- sult in exposure to the discriminative stimuli (2,9, 11).These responses will be classified in terms of their contingencies; that is, a response of the former type will be referred to as a food-producing response (Rf), and a response of the latter type will be referred to as a stimulus-producing response (Rs).Most analyses have dealt with Rs as a theoretical construct to be inferred from