One-trial object-discrimination learning in monkeys with frontal lesions.

Abstract

Frontal, inferotemporal, and unoperated monkeys were tested on a series of one-trial learning problems involving delayed matching or nonmatching from baited or unbaited samples. All animals tended to choose the new object on the test trial, regardless of their pretrial experience. When this response was correct, frontals performed at a high level; otherwise, they performed poorly. "The analysis suggests that frontal lesions produce abnormal difficulty in suppressing whatever response normally prevails in a given situation." (PsycINFO Database Record (c) 2006 APA, all rights reserved)