Abstract
Rabbits received classical conditioning of the nictitating membrane response to a light CS. Experimental animals then received 18, 36, 118, or 354 nonreinforced tone presentations followed by summation tests for active inhibition in which the tone was compounded with the light. Control animals sat restrained in the conditioning chambers for periods of time corresponding to the experimental animals, but did not experience the tone between initial conditioning to the light and the summation test phase. The degree to which addition of the tone depressed conditioned responding to the light was essentially the same for experimental and control groups, thereby negating the possibility that the tone possessed active or conditioned inhibitory properties.
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This research was supported by NSF grant GB-24557 to the third author.
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Solomon, P.R., Lohr, A.C. & Moore, J.W. Latent inhibition of the rabbit’s nictitating membrane response: Summation tests for active inhibition as a function of number of CS preexposures. Bull. Psychon. Soc. 4, 557–559 (1974). https://doi.org/10.3758/BF03334289
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DOI: https://doi.org/10.3758/BF03334289