THREE‐CONFIGURATION MATCHING‐TO‐SAMPLE IN THE PIGEON

Pigeons were trained on a zero‐delay matching‐to‐sample procedure during which only three of the four possible stimulus configurations were presented. Subsequently, all birds were exposed to all four configurations as a transfer test. A high degree of negative transfer from the three training configurations was obtained in Experiment 1. The results of Experiment 2 indicated that three‐configuration training produced differential position‐preference effects. During the transfer test, responding after one sample stimulus was apparently based on position, while responding after the other sample was based on color. 1972 Society for the Experimental Analysis of Behavior