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  • Title: Prehatch color stimulation effects on color pecking preferences and color discrimination learning in white leghorn chicks.
    Author: Fischer GJ, Davis S, Nord JA.
    Journal: Dev Psychobiol; 1975 Nov; 8(6):525-31. PubMed ID: 1233329.
    Abstract:
    Four experiments assessed the effects of stimulating chick embryos with colored light at 2 intensity levels. Both posthatch color pecking preferences (Experiments 1 and 2) and color discrimination learning (Experiments 3 and 4) were unaffected. These results affirm and extend a prior finding of no pre- and posthatch colored light stimulation effect on posthatch color preferences in ducklings. The color pecking preferences found replicated prior findings with chicks. However, they differed from the approach color preferences observed in color discrimination learning.
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