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Flom, Megan; Cohen, Madeleine; Saudino, Kimberly J. – Journal of Child Psychology and Psychiatry, 2017
The Theory of Optimal Stimulation (Zentall & Zentall, "Psychological Bulletin," 94, 1983, 446) posits that the relation between activity level (AL) and cognitive performance follows an inverted U shape where midrange AL predicts better cognitive performance than AL at the extremes. We explored this by fitting linear and quadratic…
Descriptors: Toddlers, Cognitive Ability, Activities, Correlation
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Feldman, Ruth; Eidelman, Arthur I.; Rotenberg, Noa – Child Development, 2004
To examine the development of triplets, 23 sets of triplets were matched with 23 sets of twins and 23 singletons (N138). Maternal sensitivity was observed at newborn, 3, 6, and 12 months, and infants' cognitive and symbolic skills at 1 year. Triplets received lower maternal sensitivity across infancy and exhibited poorer cognitive competencies…
Descriptors: Family Environment, Child Rearing, Twins, Cognitive Development
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Losoya, Sandra H.; Callor, Suzanne; Rowe, David C.; Goldsmith, H. Hill – Developmental Psychology, 1997
Parents who were identical twins, fraternal twins, or adopted siblings completed questionnaires assessing attitudes toward parenting and specific parenting practices, the emotional atmosphere of the home, and parental personality. Model-fitting results implicated modest genetic effects on affect-related aspects of parenting, such as parental…
Descriptors: Adopted Children, Children, Family Environment, Family Influence
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Daniels, Denise; Plomin, Robert – Developmental Psychology, 1985
Used the Sibling Inventory of Differential Experience with 396 adolescent and young adult children to determine the extent to which genetic differences between siblings or sibling differences in family constellation variables were responsible for differential experiences. (HOD)
Descriptors: Adolescents, Adopted Children, Comparative Analysis, Family Environment