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| Content Provider | Springer Nature Link |
|---|---|
| Author | Davis, Deborah Winders Finkel, Deborah Turkheimer, Eric Dickens, William |
| Copyright Year | 2015 |
| Abstract | The Infant Behavior Record (IBR) from the Bayley Scales of Infant Development has been used to study behavioral development since the 1960s. Matheny (1983) examined behavioral development at 6, 12, 18, and 24 months from the Louisville Twin Study (LTS). The extracted temperament scales included Task Orientation, Affect-Extraversion, and Activity. He concluded that monozygotic twins were more similar than same-sex dizygotic twins on these dimensions. Since this seminal work was published, a larger LTS sample and more advanced analytical methods are available. In the current analyses, Choleksy decomposition was applied to behavioral data (n = 1231) from twins 6–36 months. Different patterns of genetic continuity vs genetic innovations were identified for each IBR scale. Single common genetic and shared environmental factors explained cross-age twin similarity in the Activity scale. Multiple shared environmental factors and a single genetic factor coming on line at age 18 months contributed to Affect-Extraversion. A single shared environmental factor and multiple genetic factors explained cross-age twin similarity in Task Orientation. |
| Starting Page | 610 |
| Ending Page | 621 |
| Page Count | 12 |
| File Format | |
| ISSN | 00018244 |
| Journal | Behavior Genetics |
| Volume Number | 45 |
| Issue Number | 6 |
| e-ISSN | 15733297 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2015-10-19 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Behavior Childhood Longitudinal Twin studies Louisville Twin Study Clinical Psychology Health Psychology Public Health |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Ecology, Evolution, Behavior and Systematics Genetics (clinical) |
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