Abstract

Preschool-aged Ss were exposed to 40 presentations of either a red or a green stimulus light. A discriminative reaction time task was then administered, the red and the green light each serving as the signal to respond on half of 50 trials. The task entailed pressing a red or a green response button, depending on whether the red or green light appeared. Response speeds were significantly slower when the familiarized stimulus served as the signal to respond. Certain sequential effects were observed in the data. Several interpretations of the results are discussed.

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