INFLUENCE OF BRIGHTNESS PREFERENCE ON ASSESSMENT OF CORTICAL-LESION DEFICITS IN RATS

2 experiments were conducted concerning the possible influence of differential brightness preference on the assessment of posterior lesion deficits in rats. In Exp. I 40 adult male Long-Evans hooded rats were tested for brightness preference in a free-choice situation. Ss chose the brighter of 2 alternatives while normals consistently responded to positions. When 60 adult male Long-Evans hooded rats were tested in a learning situation, Ss required to select a dimmer alternative needed more trials to criterion than either normals or Ss choosing a bright alternative or normals selecting a dim stimulus. (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.