LAUSR

Abstract Associative cue competition treatments like blocking reduce behavioral control by a target cue at later test. Interestingly, Pavlovian conditioning experiments have documented that two cue competition treatments can counteract when they are administered together, resulting in less competition with and greater behavioral control by a target CS (for a review, see Wheeler & Miller, 2008 ). The present experiments confirmed this observation in a human contingency learning procedure. In two human contingency learning experiments, participants received Phase 1 training of two excitatory cues (C and D, A and D, or A and B) followed by Phase 2 ABX + trials. We observed greater ratings to cue X at test by participants who received previous training of both A and B than by participants who received Phase 1 training of A alone. Thus, two blocking cues counteracted in human contingency learning.