Stimulus Adaptation as an Alternative to Latent Learning

Abstract

The experiment investigated the hypothesis that latent learning effects may be based on simple stimulus adaptation. Three groups of rats were reinforced for left-turning responses on an elevated T-maze. Prior to the onset of reinforcement, a latent-learning group was given a number of nonreinforced trials on the T-maze, and an adaptation group was given the same number of nonreinforced trials on the maze segments assembled as a runway. A regular learning group was given reinforcement from the outset. Both of the former groups showed a typical latent learning effect, reaching criterion in fewer reinforced trials than the regular learning group (Ps < .05). It was suggested that stimulus adaptation increases responsiveness to the reinforcer and thus promotes rapid learning. Such adaptation may be considered the basis of latent learning effects in most cases.