Delayed response learning to auditory stimuli is impaired in cage-reared cats

Four normal and eight cage-reared cats were used. Four of the cage-reared cats were visually deprived in the first 6 months of life. The cats were trained on a three-choice delayed response task to auditory stimuli. All normal cats mastered a 1-min delay and two cats even a 6-min delay. In contrast, two cage-reared cats failed to cope even with a 5-s delay, four cats with a 15-s delay and the remaining two cats with a 1-min delay. No significant difference was found between the non-deprived and the deprived cage-reared cats. The deficits was analogous to that shown by cage-reared cats during delayed response, visual learning. Thus, cage-rearing strongly impairs delayed responding to at least two different sensory modalities.