Hue Matching and Hue Oddity in Pigeons: Is Explicit Training Not to Peck Incorrect Hue Combinations a Sufficient Condition for Transfer?
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In Experiment 1, pigeons were trained in a two-key higher-order conditional discrimination paradigm in which white lines tilted 0° or 90° were superimposed on colored backgrounds to signal matching or oddity contingencies. When the red and green training hues were replaced by blue and yellow during transfer, there was no transfer of appropriate responding to novel hues. In Experiment 2, pigeons were trained in a simple two-key matching-to-sample paradigm with red and green hues. A series of nine transfer tests was conducted in which either one or two novel hues were substituted for either one or both of the original training hues. The results of the transfer tests failed to provide strong evidence for concept learning and suggest that explicit training not to peck incorrect comparisons is not a sufficient condition for successful transfer of hue matching and oddity in pigeons.
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