Form preferences in newly hatched chicks


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Abstract

Newly hatched domestic chicks consistently pecked more at round than at angular objects among 40 varied stimulus objects presented, both 2- and 3-dimensional attributes being crucial variables. The evidence from dark-hatched chicks suggests innate determination of the visual form preference function. Repeated testing showed the preferences to be maintained in the face of unreinforced response. Differences between these results and those of studies on visually deprived animals are discussed. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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