Abstract
To examine the effects of variations in the stimulus conditions of habituation, 48 cats were conditioned under three types of habituation pre-training. The major condition of interest was different rates of nonreinforced pre-exposure to the same physical stimulus in 1-hr. sessions for four days. Pre-training was followed by standard escape-avoidance with 10 trials a day for 16 days. Rates of acquisition of escape-avoidance varied significantly with the type of habituation pre-training given, the periodicity of stimulus exposure, additional cue, and age. It has been inferred that habituation is an anticipatory response dependent upon the predictability of stimulus occurrence.
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