Relations between twins' similarity of appearance and behavioral similarity: Testing an assumption
- 1 July 1976
- journal article
- research article
- Published by Springer Science and Business Media LLC in Behavior Genetics
- Vol. 6 (3), 343-351
- https://doi.org/10.1007/bf01065729
Abstract
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.Keywords
This publication has 12 references indexed in Scilit:
- Resemblance in appearance and the equal environments assumption in twin studies of personality traitsBehavior Genetics, 1976
- Reliably Separating Identical From Fraternal TwinsArchives of General Psychiatry, 1975
- Twins: Mental development in the preschool years.Developmental Psychology, 1974
- Separating Identical From Fraternal TwinsArchives of General Psychiatry, 1973
- Hereditary Components of Response to the Double Trapezium IllusionPerceptual and Motor Skills, 1973
- Children’s Speech: Hereditary Components and Sex DifferencesFolia Phoniatrica et Logopaedica, 1973
- Genetic determinants of the Ponzo illusionPsychonomic Science, 1971
- The Diagnosis of Twin ZygosityHuman Heredity, 1966
- Contributions of twin research to psychology.Psychological Bulletin, 1966
- Primary biases in twin studies; a review of prenatal and natal difference-producing factors in monozygotic pairs.1950