ACQUIRED EQUIVALENCE OF CUES IN PIGEON AUTOSHAPING - EFFECTS OF TRAINING WITH COMMON CONSEQUENCES AND WITH COMMON ANTECEDENTS

In three experiments, we sought evidence for the acquired equivalence of cues in pigeons trained in an autoshaping paradigm. In Experiment 1, presentations of each of a pair of cues (different keylight stimuli) preceded a common consequence (a different keylight stimulus). The pattern of response then established by further training given to one member of the pair was found to generalize preferentially to the other, demonstrating equivalence between cues that had shared a common consequence. The same test procedure was used in Experiment 2, but with a training procedure in which each cue of a pair was preceded by a given stimulus. This too resulted in enhanced generalization between members of the pair, showing that equivalence can be established when cues have been experienced along with a common antecedent. Both training procedures were combined in Experiment 3 to confirm the reliability of the effects previously obtained. The discussion is focused on ways in which the associative explanation offered for cases of equivalence mediated by a common consequence might be extended to accommodate equivalence mediated by a common antecedent.