Relations between twins' similarity of appearance and behavioral similarity: testing an assumption

Questionnaires rating twins' physical similarity and similarity of dress were obtained from the parents of 121 identical and 70 same-sex fraternal twin pairs. Within-pair difference scores on several behavioral measures (two intelligence tests, two perceptual tests, one reading test, one test o...

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Bibliographic Details
Published in:Behavior genetics 1976-07, Vol.6 (3), p.343-351
Main Authors: Matheny, Jr, A P, Wilson, R S, Dolan, A B
Format: Article
Language:English
Subjects:
Body Height
Body Weight
Cognition
Eye Color
Facial Expression
Female
Genetics, Behavioral
Hair
Humans
Intelligence Tests
Male
Personality
Personality Inventory
Pregnancy
Reading
Speech
Twins
Twins, Dizygotic
Twins, Monozygotic
Visual Perception
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Summary:Questionnaires rating twins' physical similarity and similarity of dress were obtained from the parents of 121 identical and 70 same-sex fraternal twin pairs. Within-pair difference scores on several behavioral measures (two intelligence tests, two perceptual tests, one reading test, one test of speech articulation, and one personality inventory) were correlated with the twins' scores for physical similarity and similarity of dress. The correlations revealed no systematic relation between the similarity of appearance and the similarity of behaviors for either the identical twin pairs or the same-sex fraternal twin pairs. The assumption that twins' behaviors are more alike because they are more similar in appearance does not seem warranted.
ISSN:0001-8244
1573-3297
DOI:10.1007/BF01065729