Orientation invariant pattern recognition by pigeons (Columba livia) and humans (Homo sapiens)
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The orientation invariance of visual pattern recognition in pigeons and humans was studied using a conditioned matching-to-sample procedure. A rotation effect, a lengthening of choice latencies with increasing angular disparities between sample and comparison stimuli, was replicated with humans. The choice speed and accuracy of pigeons was not affected by orientation disparities. Novel mirror-image stimuli, rotation of sample shapes, a delayed display of comparison shapes, and a mixed use of original and reflected sample shapes did not lead to a rotation effect in pigeons. With arbitrarily different odd comparison shapes, neither humans nor pigeons showed a rotation effect. Final experiments supported the possibility that the complete absence of a rotation effect in pigeons is because they are relatively better than humans at discriminating mirror-image shapes compared with arbitrary shapes.
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DELIUS, Juan, Valerie D. HOLLARD, 1995. Orientation invariant pattern recognition by pigeons (Columba livia) and humans (Homo sapiens). In: Journal of Comparative Psychology. 1995, 109(3), pp. 278-290. ISSN 0735-7036. Available under: doi: 10.1037/0735-7036.109.3.278BibTex
@article{Delius1995Orien-20477, year={1995}, doi={10.1037/0735-7036.109.3.278}, title={Orientation invariant pattern recognition by pigeons (Columba livia) and humans (Homo sapiens)}, number={3}, volume={109}, issn={0735-7036}, journal={Journal of Comparative Psychology}, pages={278--290}, author={Delius, Juan and Hollard, Valerie D.} }
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