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Does Learning to Read Improve Intelligence? A Longitudinal Multivariate Analysis in Identical Twins from Age 7 to 16
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Ritchie, Stuart J.; Bates, Timothy C.; Plomin, Robert – Child Development, 2015
Evidence from twin studies points to substantial environmental influences on intelligence, but the specifics of this influence are unclear. This study examined one developmental process that potentially causes intelligence differences: learning to read. In 1,890 twin pairs tested at 7, 9, 10, 12, and 16 years, a cross-lagged…
Descriptors: Intelligence, Twins, Environmental Influences, Child Development
Effects of Part-Time "Mothering" on IQ and SQ of Young Institutionalized Children
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Saltz, Rosalyn – Child Development, 1973
A Foster-Grandparent Program group received part-time mothering'' by elderly institutional aids for a period of up to more than 4 years. A control group resided in a similar institution which did not provide supplementary foster grandparent'' care. There was a significant difference in IQ in favor of the FGP children. (Author)
Descriptors: Child Development, Data Analysis, Environmental Influences, Institutionalized Persons
The Influences of Social Class and Race on Language Test Performance and Spontaneous Speech of Preschool Children
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Johnson, Dale L. – Child Development, 1974
Differences in language proficiency between social classes and races were studied to determine the effect of familiarity of the testing situation. Results showed no natural setting language differences. (ST)
Descriptors: Disadvantaged, Disadvantaged Youth, Environmental Influences, Intellectual Development
Relationships Between Attributes of Mothers and Their Infants' IQ Scores
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Beckwith, Leila – Child Development, 1971
The present study explores the specific environmental influences in the intellectual development of 24 adoptive infants living in middle class families. (Author)
Descriptors: Child Development, Data Analysis, Environmental Influences, Infants
Biological Nonoptimality and Quality of Postnatal Environment as Codeterminants of Intellectual Development.
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Breitmayer, Bonnie J.; Ramey, Craig T. – Child Development, 1986
A four-and-a-half-year longitudinal experiment reconsidered the contribution of organic impairment to the genesis of mild mental retardation among disadvantaged children. It was hypothesized that nonoptimal perinatal conditions might result in deficits that increase a child's vulnerability to environmental risk factors. Study results supported the…
Descriptors: Child Development, Child Rearing, Cognitive Development, Day Care