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Single and concurrent discrimination learning by monkeys after lesions of inferotemporal cortex

Single and concurrent discrimination learning by monkeys after lesions of inferotemporal cortex

Quarterly Journal of Experimental Psychology. B, Comparative and Physiological Psychology 38(1): 31-51

Three monkeys with bilateral lesions of inferotemporal cortex and three unoperated controls (all previously sophisticated at visual discriminations) learned 60 discriminations between pairs of multi-featured computer-generated patterns. They then learned 5 problem sets, each composed of 5 pairs of the same kind learned concurrently, and finally 20 more single discriminations. Previous reports that inferotemporal lesions selectively impair concurrent learning were disconfirmed; given practice at learning pairs concurrently, the inferotemporals learned these at a similar rate to single pairs. Analysis of intra-problem learning supported the suggestion that the lesion affects visual identification (the ability to distinguish objects within a large population) rather than visual association or memory.

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Accession: 006421025

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PMID: 3704184

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