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Long-Term conditioned fear modification in the dog as measured by changes in urinary 11-hydroxycorticosteroids. Heart rate and behavior

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Abstract

Heart rate (HR), operant key pressing, and urinary 11-hydroxycorticosteroids (11-OH-CS) were recorded while dogs were subjected to various aversive conditioning schedules over a six-month period. The schedules consisted of Sidman avoidance, followed by a Sidman schedule which paired unavoidable shocks (US) with offset of seven discrete conditioned stimuli (CS). Introduction of the Sidman avoidance schedule led to an increase in HR. Changes in the experimental schedule always results in an increase in urinary 11-OH-CS. Neither HR nor urinary 11-OH-CS were correlated with rate of operant key pressing. Differences in the dependent variables reflected the different topological characteristics of the dogs studied. This study demonstrated: (a) a causal independence of physiological and behavioral responses conditioned to the same stimulus complex, and (b) that longterm increases in HR can be maintained if the experimental situation is manipulated to maintain the fear eliciting characteristics of the conditioning situation.

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Correspondence to Vincent P. Houser.

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Houser, V.P., Pabé, W.P. Long-Term conditioned fear modification in the dog as measured by changes in urinary 11-hydroxycorticosteroids. Heart rate and behavior. Pav. J. Biol. Sci. 9, 85–96 (1974). https://doi.org/10.1007/BF03000528

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Keywords

  • Conditional Stimulus
  • Avoidance Conditioning
  • Work Period
  • Avoidance Schedule
  • Sidman Avoidance