Levels of stimulus control: a functional approach.

摘要: This paper surveys some illustrative experiments on categorization of visual stimuli by animals other than human. The results suggest a classification categorical powers in five steps from simple discrimination to rote and open-ended categorization, concepts the use abstract relations. Nonhuman evidently readily categorize up fourth level as here defined, which is concepts. With difficulty, they can sometimes be induced rise even It at relations that large gap opens between human categorizations animals.