The effects of overtraining were examined using two dependent variables, choice response and eye fixations. Although an overtraining reversal effect was nor found using choice-response, examinations of a number of eye fixations both before and after reversal suggest that the introduction of reversal training produces greater shifts in attention in the overtrained ( n = 6) as opposed to the criterion trained group ( n = 6). Results are interpreted as supporting a theory of discrimination learning which proposes that S is developing a plan in which inputs are tested or compared against some centrally organized process.