TY - JOUR
T1 - Converging evidence for one-trial context fear conditioning with an immediate shock
T2 - Importance of shock potency
AU - Bevins, Rick A.
AU - McPhee, Janice E.
AU - Rauhut, Anthony S.
AU - Ayres, John J.B.
PY - 1997/7
Y1 - 1997/7
N2 - In a sample of 208 Holtzman-descended albino rats, we found evidence with 4 measures of conditioning (freezing, defecation, side crossing, and nose crossing) that a single 2-s, 1.0-mA immediate shock could condition fear to a context (Experiments 1, 2, and 4). When we reduced the shock intensity to 0.5 mA, we obtained a complete immediate-shock conditioning deficit according to all measures in Experiment 3 and to all but the defecation measure in Experiment 4. Results suggest two conclusions: (a) Differences in shock potency between laboratories may help explain discrepant findings about whether immediate shock supports contextual conditioning; (b) theories of contextual conditioning need a mechanism that permits that conditioning to result from immediate shock.
AB - In a sample of 208 Holtzman-descended albino rats, we found evidence with 4 measures of conditioning (freezing, defecation, side crossing, and nose crossing) that a single 2-s, 1.0-mA immediate shock could condition fear to a context (Experiments 1, 2, and 4). When we reduced the shock intensity to 0.5 mA, we obtained a complete immediate-shock conditioning deficit according to all measures in Experiment 3 and to all but the defecation measure in Experiment 4. Results suggest two conclusions: (a) Differences in shock potency between laboratories may help explain discrepant findings about whether immediate shock supports contextual conditioning; (b) theories of contextual conditioning need a mechanism that permits that conditioning to result from immediate shock.
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U2 - 10.1037/0097-7403.23.3.312
DO - 10.1037/0097-7403.23.3.312
M3 - Article
C2 - 9206026
AN - SCOPUS:0031179610
SN - 0097-7403
VL - 23
SP - 312
EP - 324
JO - Journal of Experimental Psychology: Animal Behavior Processes
JF - Journal of Experimental Psychology: Animal Behavior Processes
IS - 3
ER -