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Author: May, Kim
Resulting in 2 citations.
1. Rodgers, Joseph Lee
Rowe, David C.
May, Kim
DF Analysis of NLSY IQ/Achievement Data: Nonshared Environmental Influences
Working Paper, Norman OK: Department of Psychology, University of Oklahoma, March 1994
Cohort(s): Children of the NLSY79, NLSY79
Publisher: Department of Psychology, University of Oklahoma
Keyword(s): Cognitive Ability; Genetics; Home Observation for Measurement of Environment (HOME); Kinship; Memory for Digit Span (WISC) - also see Digit Span; Methods/Methodology; Pairs (also see Siblings); Peabody Individual Achievement Test (PIAT- Math); Peabody Individual Achievement Test (PIAT- Reading); Peabody Picture Vocabulary Test (PPVT); Siblings; Simultaneity

Permission to reprint the abstract has not been received from the publisher.

DeFries and Fulker (1985) proposed DF Analysis to measure genetic and shared environmental variance in kinship data. We use an adaptation of DF Analysis that can simultaneously account for genetic, shared environmental, and nonshared environmental influences within the same model. We fit this model to achievement measures from 5 to 12-year-old children from the National Longitudinal Survey of Youth (NLSY). The NLSY is a large national sample containing information to link kinship pairs at multiple levels, including cousins, half-siblings, full-siblings, and twins. 1044 pairs were identified by a kinship linking algorithm. The modeling approach measures heritability (h2) and shared environmental variance (c2), and tests for nonshared environmental influences. Potential nonshared influences that are tested include amount a mother reads to a child, books the child has, visits to the museum, visits to the theater, maternal spanking, and a general measure of the quality of the home environment. Several theoretical predictions are tested and supported. In particular, museum visits accounted for variance in a math test, books owned accounted for variance in reading recognition scores, and a general measure of the home environment accounted for variance in general cognitive ability.
Bibliography Citation
Rodgers, Joseph Lee, David C. Rowe and Kim May. "DF Analysis of NLSY IQ/Achievement Data: Nonshared Environmental Influences." Working Paper, Norman OK: Department of Psychology, University of Oklahoma, March 1994.
2. Rodgers, Joseph Lee
Rowe, David C.
May, Kim
DF Analysis of NLSY IQ/Achievement Data: Nonshared Environmental Influences
Intelligence 19,2 (September-October 1994): 157-177.
Also: http://www.sciencedirect.com/science/article/pii/0160289694900116
Cohort(s): Children of the NLSY79, NLSY79
Publisher: Economics Department, Moore School of Business, University of Soutn Carolina
Keyword(s): Children; Cognitive Ability; Genetics; Home Environment; Home Observation for Measurement of Environment (HOME); I.Q.; Intelligence; Kinship; Memory for Digit Span (WISC) - also see Digit Span; Methods/Methodology; Modeling; Pairs (also see Siblings); Peabody Individual Achievement Test (PIAT- Math); Peabody Individual Achievement Test (PIAT- Reading); Peabody Picture Vocabulary Test (PPVT); Siblings; Simultaneity

Permission to reprint the abstract has not been received from the publisher.

An adaptation of DF (DeFries and Fulker, 1985) is fitted to achievement measures from 5-12-year-old children from the National Longitudinal Survey of Youth (NLSY). This adaptation can simultaneously account for genetic shared environmental, and non shared environmental influences within the same model. The NLSY contains information to link kinship pairs at multiple levels including cousins, half-siblings, full-siblings, and twins. One thousand forty-four pairs were identified by a kinship-linking algorithm. From five specific measures of intellectual ability we estimated median heritability. We then tested for the presence of several specific non shared influences. As predicted differences between two related children in the number of books owned were related to differences in reading recognition scores and trips to the museum were related to a measure of mathematical ability. A general measure of the home environment accounted for non shared environmental variance in several specific measures of intelligence and in a general measure of cognitive ability.
Bibliography Citation
Rodgers, Joseph Lee, David C. Rowe and Kim May. "DF Analysis of NLSY IQ/Achievement Data: Nonshared Environmental Influences." Intelligence 19,2 (September-October 1994): 157-177.