ONE-OPERATOR AND 2-OPERATOR VERSIONS OF A 2-PHASE MODEL APPLIED TO PERFORMANCES OF VS AND CS IN HUMAN EYELID CONDITIONING

Applied a 2-phase model to human eyelid conditioning data after Ss had been classified either as V- (rapid eyelid closures) or as C-type (slow eyelid closures) responders. Ss were 138 undergraduates. The model fit both subsets reasonably well, with growth rate and asymptote being greater for the V responders. Through the use of a 2-operator version of the model it was also found that a greater effect on response probability was obtained following those trials on which a CR did not occur, thus indicating the need for a more complicated model and suggesting that more than just the direct reinforcement of the CR by the UCS is involved in the acquisition of the eyelid CR. (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.