DOUBLE-ALTERNATION LEARNING THROUGH TIME DISCRIMINATION AS A JOINT FUNCTION OF MOTIVATIONAL INSTRUCTIONS AND DISCRIMINANDA

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The present study was concerned with the effects of the intensity of motivation and the difference between discriminanda (time to reinforcement) on double-alternation learning. 150 students were assigned to 5 motivation groups, each consisting of 3 discriminandum groups. Ss' task was to find out which of 2 response buttons was associated with a shorter ("correct") buzzer sound which changed its side in double-alternation. The 5 motivation groups differed significantly in mean log latency but not in number of correct responses. The increased difference in time to reinforcement for the positive and negative responses facilitated the choice performance but not the speed of response. These results were discussed in terms of the Yerkes-Dodson law, of which a variation of the Hullian explanation was proposed. An analysis of the present results revealed that the percentage of correct responses was a linear function of the difference between log correct and incorrect time to reinforcement.
公益社団法人日本心理学会の論文