The effect of cortical lesions on emotional and regressive behavior in the rat. II. Regressive behavior

The rats of the preceding study (see XV: 783) were tested for regressive behavior in a T-shaped apparatus. After perfection of a right- or left-turning response, the animals were trained to make the opposite turn. They were then given a shock while approaching the choice point. Both regressive and perseverative behavior was observed. However, the percentage of animals regressing or perseverating was not significantly different for the experimental and control groups. The type of response to shock was not predictable in terms of defecation and activity in an open field, trials to master a straightaway having a paper barrier, and time and trials required to master the T-shaped apparatus.