Abstract

Konrad Lorenz suggests that adequate grounds for classifying some behaviors as innate are to be found in the results of what he calls “the deprivation experiment“: ”… the experiment of withholding from the young organism information concerning certain well-defined givens of its natural environment.” (Lorenz 1965, p. 83). Thus, a stickleback fish is deprived of the information that its rival has a red belly. The stickleback is then confronted, for the first time, with a red-bellied rival (or a red-bellied dummy). If that stickleback responds with species-typical rival-fighting behavior, then (according to Lorenz) the experiment has established that the stickleback possesses certain innate information about its natural environment. On the other hand, should the stickleback fail to respond in this way, Lorenz tells us that ”…we should not be justified in asserting that this response is normally dependent on learning.