Abstract
In 4 experiments, pigeons received autoshaping with various combinations of three stimuli, A, B, and C, before test trials in which responding during all three stimuli, ABC, was compared with that during a three-element control compound, DEF, which had been consistently paired with food. Pairing A, B, and C individually with food resulted in similar rates of responding during ABC and DEF (Experiments 1 and 2). Responding was faster, however, during ABC than during DEF after training in which food was signaled by the pairs of stimuli (AB, AC, and BC; Experiment 1). Responding was also faster during ABC than during DEF after training involving reinforced ( +) and nonreinforced (°) trials of the form ABC + A° BC°, followed by A + BC + (Experiment 2), or AB + BC + B° (Experiments 3 and 4). The results are consistent with those of a configural analysis of summation.
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