Abstract
After 3 groups of 3 chickens had been reared in the dark, 1 group was maintained in the dark, 1 in monochromatic light of 589 mMU, and 1 in white light. After all groups were trained to peck a key in the presence of a 589-mMU light, a generalization test over wavelength was administered. All groups produced peaked generalization curves. No differences were found between the rearing groups. It was concluded that exposure to a continuum may not always be necessary to obtain a peaked generalization curve along that continuum. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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