1. REM: A Universal Theory of Generalization, Discrimination and Summation in Associative Learning
Bill Whitlow (Rutgers University, USA)
Allan Wagner's REM theory of associative learning predicts that generalization tests and summation tests can be explained in terms of a single parameter, (1-r), that represents the replacement of suppressed elements by configural elements when stimulus components are combined in stimulus compounds. This talk presents evidence that supports this prediction when REM is supplemented with a representation of the cues common to the components used in testing.
2. Effects of delay of reinforcement on ABA renewal
Carlos Flores, L. Rebeca Mateos Morfin & Kenneth Madrigal (Universidad de Guadalajara, Mexico)
ABA renewal was assessed by decreasing response rates by means of extinction or a 12-s delay of reinforcement in one experiment with rats. In a first phase, rats were trained to lever press for water in Context A. Rats were exposed to a second phase in Context B, where lever-pressing decreased for all rats; for one group of rats, lever-pressing decreased by means of extinction, while lever-pressing decreased by means of a 12-s delay for the other group. During a third phase, both groups were once again exposed to Context A with no reinforcer deliveries for lever-pressing. Once rats were exposed to the latter phase, renewal was observed for both groups, being higher for the Extinction Group. Results suggest that delay of reinforcement can be used as an alternative procedure to help reduce behavior and prevent relapse