The chick's “preference” for some visual properties of water

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At 3 days of age 2 groups of chicks were tested for preference when an array of 6 substances was presented. One group had no prior experience with food or water, while the other had been given them from birth. The distribution of responses by both groups was similar, the order of preference being: mercury, plastic, blue water, water, metal, and red water. “Although no clear evidence of the propotency of any of the visual attributes of water was demonstrated, it seems probable that attractiveness to the chick lies in a combination of a bright reflecting surface and the movement of the stimulus.” (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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