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Performance level and drug effects

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The present experiment was conducted to examine the effects of a mild dose of a “tranquillizing” drug, chlorpromazine, on the lever-pressing behaviour of albino rats. Twelve male rats were divided into two groups characterized by high and low performance on the basis of their leverpressing scores in the Skinner box. The results showed that the responses of the high performance group were significantly depressed by the drug. Further, the results confirmed the contention of Singh (1964) that habit strength and performance level operate antagonistically in determining the susceptibility of trained responses to the deleterious effects of drug.

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  1. Bindra, D., and J. Mendelson: Interaction of habit strength and drug effects. J. comp. physiol. Psychol. 55, 217–219 (1962).

  2. — —: Training, drive level, and drug effects: A temporal analysis of their combined influence on behaviour. J. comp. physiol. Psychol. 56, 183–189 (1963).

  3. Manocha, S. N.: Study of interaction of various levels of drive with some drug effects. Unpublished Master's Thesis. Panjab University Library 1964.

  4. - Effects of drug on early and late learners. Indian J. exp. Psychol. (in press) (1968).

  5. —, and A. Sood: Interaction of drug effects with habit strength in reactive and non-reactive rats. Indian J. exp. Psychol. 1, 22–26 (1967).

  6. Singh, S. D.: Habit strength and drug effects. J. comp. physiol. Psychol. 58, 468–469 (1964).

  7. —, and S. N. Manocha: The interaction of drug effects with drive level and habit strength. Psychopharmacologia (Berl.) 9, 205–209 (1966).

  8. —, and S. N. Manocha: Habit, drive, and drug effects. Psychol. Stud. 10, 38–44 (1965).

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Manocha, S.N. Performance level and drug effects. Psychopharmacologia 12, 123–126 (1968). https://doi.org/10.1007/BF00401541

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  • Present Experiment
  • Deleterious Effect
  • Drug Effect
  • Performance Level
  • Performance Group