SES and CHAOS as environmental mediators of cognitive ability: A longitudinal genetic analysis

  • Hart S
  • Petrill S
  • Deater Deckard K
 et al. 
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This study examined shared environmental influences on the longitudinal stability of general cognitive ability, as mediated by socioeconomic status and chaos in the home, using 287 pairs of elementary school-age twins drawn from the Western Reserve Reading Project (WRRP). General cognitive ability was evaluated at two annual assessments using the Stanford-Binet Intelligence Test. SES was examined using the highest level of education achieved by the mother of the twins, and chaos by a 6-item parent-report questionnaire. Results suggest that SES and CHAOS not only account for independent sources of shared environmental influences related to general cognitive ability at a given measurement occasion, but these effects also account for a portion of the longitudinal stability of general cognitive ability in early childhood. © 2006 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • General cognitive ability
  • SES
  • Twins

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  • Sara A. Hart

  • Stephen A. Petrill

  • Kirby Deater Deckard

  • Lee A. Thompson

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