Interactions of Temporal and Releasing Factors in Familial Recognition of Own and Ancestral Species

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Abstract
128 isolated White Leghorn chicks were tested in a mixed-model factorial design (2 species × 2 sexes × 4 days, with 8 Ss per cell, and with 6 repeated measurements on each S) for social behavior expressible before standard imprinting operations. The sex but not the species of the adult targets was a significant main source of variation, as was the day on which testing occurred; interactions at the first, second, and even third orders were significant, suggesting that comparability between imprinting experiments might be hard to achieve unless the manipulation of an array of interrelated factors can be systematized.

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