W L Selekman

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Five years ago, pigeons trained to peck a key for food were periodically presented with a 1000 cps tone which ended with electrical shock. They were then tested for the stimulus generalization of conditioned suppression. After an interruption of 2.5 yr, another series of generalization tests showed no loss of suppression. The present study was conducted 1.5(More)
  • W L Selekman
  • Journal of the experimental analysis of behavior
  • 1973
Pigeons received discrimination training in which the presence of a white field was correlated with variable-interval reinforcement and the presence of a monochromatic field was correlated with extinction. Responses during the negative stimulus prolonged its duration. Five experimental groups each received a different number of discrimination sessions up to(More)
Pairs of rats received grid shock in a conical enclosure. Each shock elicited the stereotyped fighting posture. An omnidirectional pole, which was always between the rats, was accidentally operated whenever the rats fought. The number of pole hits, and the number of observed fight bouts, increased with current intensity. The number of pole hits served as a(More)
Pigeons trained to peck a key for food were periodically presented with tones ending with electrical shock until tone presentation consistently suppressed ongoing pecks. Shock was then discontinued and gradients of stimulus generalization were assessed by presenting tones with frequencies above, below, and at the frequencies of those used to develop(More)
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