Reversal learning by paradise fish (Macropodus opercularis).

Abstract

Groups of fish that received 50 or 100 overlearning trials on a combined spatial-brightness discrimination task took more trials to learn to reverse the habit than did fish not subjected to overtraining. Fish that were given 20 successive reversals on the problem did not improve in performance. From Psyc Abstracts 36:01:1EJ76W. (PsycINFO Database Record (c) 2006 APA, all rights reserved)