Recovery of conditioned UCR diminution following extinction.

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Abstract
2 groups of Ss (each N = 45) were given 16 paired or unpaired CS-UCS (light-shock) acquisition trials. Each group was then divided into 3 subgroups which received either 3, 6, or 12 extinction trials before receiving 1 paired CS-UCS test trial. In addition, another group (N = 15) was given paired acquisition trials followed by 3 UCS-alone trials. It was found that the UCR increased in size on the UCS-alone trials following reinforcement, and it recovered significantly more on the test trial following extinction for groups which received paired than it did for groups which received unpaired conditioning trials. Amount of recovery on the test trial was not related to the number of extinction trials. It was concluded that the recovery following extinction was due to extinction of the inhibition or to its disinhibition. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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