Differential reinforcement of shortlatency responses in the white rat

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This study was concerned with the effect of selective reinforcement of short-latency responses by rats in a lever box. After discrimination training, each of 8 experimental Ss was reinforced on all trials in which its response latency was less than the median of its latencies on the previous day. Relative to control Ss that received the same number and sequence of reinforcements, experimental Ss were similar with respect to the mean log latency of response but the latency distribution of experimental Ss was more variable than that of the control Ss (p < .01). These results suggested that differential reinforcement of short-latency responses may be more closely related to stimulus discrimination than to response differentiation. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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