Transfer of learning between matching (or non-matching)-to-sample and samedifferent discriminations in rats

. Four experiments examined transfer of learning between matching (or nonmatching)-to-sample discriminations and same-different discriminations. In Experiment 1, rats trained with matching (or nonmatching)-to-sample discriminations learned their subsequent nonshift tasks, consisting of the novel stimuli and novel configurations, faster than subsequent shifted ones. In Experiment 2, rats trained with same-different discriminations learned very quickly their subsequent same-different tasks consisting of the novel stimuli and novel configurations. Of all the rats, 88 % responded correctly on the first trial in Phase 2 transfer. In Experiment 3, rats trained with the matching (or nonmatching)-to-sample discriminations facilitated subsequent same-different discriminations, relative to rats given either a simultaneous discrimination or a pseudo-discrimination training with the matching (or nonmatching)-to-sample discriminations. I