TY - JOUR
T1 - Extending Continuous Versus Discontinuous Conditioned Stimuli Before Versus After Unconditioned Stimuli
AU - Albert, Melody
AU - Ricker, Sean
AU - Bevins, Rick A.
AU - Ayres, John J.B.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1993/7
Y1 - 1993/7
N2 - Conditioned suppression was used with rats to study the effects of extending conditioned stimuli (CSs) before versus after the delivery of unconditioned stimuli. These extensions are termed B and A extensions, respectively. Within-group designs were used to compare the effects of extending CSs when 2-min parts of those CSs were separated by temporal gaps of 6 min versus a separation of no gap. The results were as follows: (a) B extensions weakened conditioning more than did A extensions, with or without gaps; (b) under some conditions, this asymmetrical effect persisted with extended training; (c) gaps between 2-min parts of a B extension had no detectable effect; and (d) under some parameter values, gaps between 2-min parts of an A extension weakened conditioning significantly. These results are better predicted by the Sometimes Opponent-Process model (SOP; A. R. Wagner, 1981) than by the Rescorla-Wagner-Frey-Sears real-time model (J. J. B. Ayres, M. Albert, & J. C. Bombace, 1987).
AB - Conditioned suppression was used with rats to study the effects of extending conditioned stimuli (CSs) before versus after the delivery of unconditioned stimuli. These extensions are termed B and A extensions, respectively. Within-group designs were used to compare the effects of extending CSs when 2-min parts of those CSs were separated by temporal gaps of 6 min versus a separation of no gap. The results were as follows: (a) B extensions weakened conditioning more than did A extensions, with or without gaps; (b) under some conditions, this asymmetrical effect persisted with extended training; (c) gaps between 2-min parts of a B extension had no detectable effect; and (d) under some parameter values, gaps between 2-min parts of an A extension weakened conditioning significantly. These results are better predicted by the Sometimes Opponent-Process model (SOP; A. R. Wagner, 1981) than by the Rescorla-Wagner-Frey-Sears real-time model (J. J. B. Ayres, M. Albert, & J. C. Bombace, 1987).
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U2 - 10.1037/0097-7403.19.3.255
DO - 10.1037/0097-7403.19.3.255
M3 - Article
C2 - 8340768
AN - SCOPUS:0027638720
VL - 19
SP - 255
EP - 264
JO - Journal of Experimental Psychology: Animal Behavior Processes
JF - Journal of Experimental Psychology: Animal Behavior Processes
SN - 0097-7403
IS - 3
ER -