Evidence for relational transposition.

Abstract
Albino rats trained in a jumping apparatus to stimulus cards presenting two brightnesses in upper and lower halves of the card showed successful discrimination of the brightness patterns. After training they were tested on new sets of cards, so selected that relational theory and specific stimulus theory would make either the same or different predictions concerning the resulting behavior. On the cards where the two theories predicted opposing outcomes, 65% of the choices were predicted by the relational theory, and on the cards where only the relational theory could make an unambiguous prediction, 95% of the choices were in that direction. (PsycINFO Database Record (c) 2006 APA, all rights reserved)