Anisman, Hymie (1970) Fear reduction and avoidance learning following administration of alcohol during prior CS-shock exposure. Masters thesis, Memorial University of Newfoundland.
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To determine if the classical conditioning of fear was responsible for the facilitative effects of prior exposure to CS-shock pairings, 2 groups of 48 rats were given either 25 light-tone and shock pairings or 25 light-tone presentations only. One-half of the Ss in each of these groups were injected with 1.5 cc/kg of alcohol 5 minutes prior to the pretraining procedure, while the remaining Ss were injected with 1.5cc/kg of physiological saline. 24 hours after initial treatment one-half of the Ss received 90 avoidance conditioning trials under the same drug state as during prior training, while the remaining Ss were tested under the other drug condition. -- Results indicated that Ss which received prior CS-shock pairings responded faster and learned the avoidance task more readily than Ss given only prior CS presentations. In addition, Ss which received saline during prior CS-shock exposure responded more rapidly during the first 5 and last 5 trials than did Ss who either received alcohol during prior CS-shock exposure, or Ss who received alcohol or saline and only prior CS presentations. Moreover, Ss whose initial treatment consisted of prior CS-shock exposure with saline made more avoidance responses during the first block of 30 trials, and made the first avoidance response and 3 consecutive avoidance responses earlier than Ss in each of the other groups. These results were taken to indicate that prior CS-shock exposure results in the conditioning of fear to the CS, thereby motivating escape from the CS. Escape from the CS reduces the fear, thus reinforcing the avoidance response. -- The present study also indicated that administration of alcohol during avoidance training increased the inter-trial response rate, but decreased the avoidance response rate. These results were interpreted as further support for the hypothesis that fear motivates, and that fear reduction reinforces the avoidance response.
|Item Type:||Thesis (Masters)|
|Additional Information:||Bibliography: leaves 40-47.|
|Department(s):||Humanities and Social Sciences, Faculty of > Psychology
Science, Faculty of > Psychology
|Library of Congress Subject Heading:||Avoidance (Psychology)|
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