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Journal Article

Inheritance of Behavior in Infants

D. G. Freedman and Barbara Keller
Science
New Series, Vol. 140, No. 3563 (Apr. 12, 1963), pp. 196-198
Stable URL: http://www.jstor.org/stable/1710989
Page Count: 3

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Topics: Infants, Fraternal twins, Movies, Nervous system diseases, Twins, Observational learning
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Inheritance of Behavior in Infants
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Abstract

Mental and motor abilities and personality development were studied in 20 pairs of infant twins of the same sex on a monthly basis in their first year, that is, before mutual imitation becomes a factor. Blood group determinations, made after the study was completed, revealed an N$_{1}$ of 11 fraternal and N$_{2}$ of 9 identical pairs. Within-pair differences were significantly greater within fraternal pairs on all tests and rating scales.

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