David W Fulker
Dados Biográficos
| ID | 4231972 |
|---|---|
| NOME | David W Fulker |
| PRENOMES | David W |
| SOBRENOME | Fulker |
| ASSINATURA | FULKER D W |
| AFILIAÇÕES | University of Colorado Boulder |
| ORCID | 0009-0003-7561-0698 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 23 |
| TOTAL DE CITAÇÕES | 216 |
| TOTAL COMO AUTOR | 23 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1970 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 1998 |
| ÍNDICE H | 8 |
Genotype–environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Genotype-environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Adoption results for self-reported personality
Twin studies consistently indicate moderate genetic influence on individual differences in personality as assessed using self-report questionnaires, with heritability estimates typically about 40%. In this first analysis of self-report personality data from the longitudinal Colorado Adoption Project, little evidence is found for additive genetic influence in parent-offspring and sibling adoption analyses based on a foundation sample of 245 adopti…
Exploring the genetic etiology of low general cognitive ability from 14 to 36 months
The genetic and environmental etiology of low general cognitive ability (g) during infancy and early childhood has not previously been investigated. The current study examined the genetic etiology of low cognitive ability at 14, 20, 24, and 36 months with twins from the MacArthur Longitudinal Twin Study. Low g groups were formed from the lowest 10th percentile at each age. Univariate probandwise concordance rates and DeFries-Fulker (J. C. DeFries…
Comorbidity in hyperactive children
Linkage between sexual orientation and chromosome Xq28 in males but not in females
Genetic and environmental influences on cognition during childhood
Rapid assessment of infant predictors of adult IQ
Rapid assessment of infant predictors of adult IQ
Infant predictors of adult IQ were assessed with same-sex infant twins (114 pairs) and their parents. The midtwin-midparent design permits the rapid assessment of infant measures to predict later behavior, because the midparent score serves as a proxy for the infant's potential score at maturity. At 5, 7, and 9 months, Ss were observed on the Fagan Test of Infant Intelligence, hand preference, vocalizations, selected Bayley Scales of Infant Devel…
Genetic influence on tester-rated infant temperament as assessed by Bayley's Infant Behavior Record
Results are reported for the 1st sibling adoption study of temperament in infancy, using tester ratings on the Infant Behavior Record (IBR) at 1 and 2 years for a sample of 95 pairs of nonadoptive siblings and 80 pairs of adoptive siblings. Twin data reported by Matheny (1980) for 85 identical (MZ) and 50 fraternal (DZ) twin pairs on the same measure at the same ages were combined with the sibling adoption data in maximum-likehood model-fitting a…
Genetic mediation of the home environment during infancy
Continuity and change in general cognitive ability from 1 to 7 years of age
Observed and latent sources of individual differences in cognitive development were explored in data from adopted and nonadopted siblings measured from 12 months to 7 years and identical and nonidentical twins measured from 12 to 36 months. Longitudinal path models, designed to examine the structure of observed stability and assess the genetic and environmental sources of age-to-age change and continuity, suggest that observed continuity arises f…
Genetic and environmental influences on maternal and sibling interaction in middle childhood
Genetic and environmental influences on maternal and sibling interactions were examined in 67 mother-child-child triads from nonadoptive families and 57 mother-child-child triads from adoptive families (in which both children were adopted and genetically unrelated). Triads were videotaped in 6 play settings in their homes. In addition, each sibling pair was observed in an unstructured setting in the home, and mothers completed an interview about …
Parent‐Offspring and Sibling Adoption Analyses of Parental Ratings of Temperament in Infancy and Childhood
A first step toward understanding the etiology of personality is to investigate the relative impact of genetic and environmental factors using twin and adoption designs. Twin studies of infants and young children indicate substantial genetic influence for parental ratings of temperament in the preschool years. Adoption studies, however, have not previously been reported during the early years of life. We present parent‐off spring comparisons for …
Home environment and cognitive ability of 7-year-old children in the Colorado Adoption Project
Family environment may be related to childhood cognitive abilities either directly through environmental transmission or indirectly through correlations with parental genotypes. Using the methodology of quantitative behavioral genetics, the magnitude of such effects can be determined. In this study, these relations were investigated using measures of home environment obtained from infancy through 7 years of age and WISC-R full scale IQ on a sampl…
Infant predictors of preschool and adult IQ
The aim of this article is twofold. First, the usefulness of the midparent-midtwin design as a proxy for a longitudinal study was assessed. This design should prove effective in determining which of a nmber of infant measures are predictive of later IQ and thus are likely candidates for infant intelligence measures. Second, a true longitudinal study was conducted to examine the predictability of our infants measures in chidhood. Intelligence meas…
The Development and Validation of a Test Battery Measuring Specific Cognitive Abilities in Four-Year-Old Children
A battery of nine specific cognitive abilities tests to assess verbal, spatial, perceptual speed, and memory abilities in children at age 4 was constructed and administered to a sample of 267 children participating in the Colorado Adoption Project. Exploratory and confirmatory factor analyses revealed four correlated factors that adequately describe the covariation among the tests. Specific cognitive ability composites showed test-retest correlat…
Altruism and aggression
Five questionnaires measuring altruistic and aggressive tendencies were completed by 573 adult twin pairs of both sexes from the University of London Institute of Psychiatry Volunteer Twin Register. The questionnaires measured altruism, empathy, nurturance, aggressiveness, and assertiveness. The intraclass correlations for the five scales, respectively, were .53, .54, .49, .40, and .52 for 296 monozygotic pairs, and .25, .20, .14, .04, and .20 fo…
Multivariate Familial Analysis of Cognitive Measures in the Colorado Family Reading Study
Multivariate path analysis is employed to examine the etiologies of variation and covariation of three composite cognitive measures in the Colorado Family Reading Study: reading ability, symbol-processing speed, and spatial/reasoning. Measures of phenotypic assortative and cross-assortative mating are incorporated in a multivariate analysis of familial resemblance within nuclear families. Phenotypic variances and covariances are partitioned into …
A genetic and environmental analysis of sensation seeking
Effect of Strain and Level of Shock on the Behaviour of Rats in PSI Experiments
Rats from five strains were tested for the ability precognitively to avoid three levels of shock. There were clear effects of shock and strain on the number of observed Random Behaviour Trials, with the Roman High Avoidance strain being the only one to maintain high levels of Random Behavior Trials at high levels of shock. However, there was no evidence for any psi ability in this experiment and this null result was not affected by either the str…
A biometrical genetic approach to intelligence and schizophrenia
(1973). A biometrical genetic approach to intelligence and schizophrenia. Social Biology: Vol. 20, No. 3, pp. 266-275
Comparison of the biometrical genetical, Mava, and classical approaches to the analysis of the human behavior
Altruism and aggression
Five questionnaires measuring altruistic and aggressive tendencies were completed by 573 adult twin pairs of both sexes from the University of London Institute of Psychiatry Volunteer Twin Register. The questionnaires measured altruism, empathy, nurturance, aggressiveness, and assertiveness. The intraclass correlations for the five scales, respectively, were .53, .54, .49, .40, and .52 for 296 monozygotic pairs, and .25, .20, .14, .04, and .20 fo…
Genotype–environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Genotype-environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Comparison of the biometrical genetical, Mava, and classical approaches to the analysis of the human behavior
Genetic and environmental influences on maternal and sibling interaction in middle childhood
Genetic and environmental influences on maternal and sibling interactions were examined in 67 mother-child-child triads from nonadoptive families and 57 mother-child-child triads from adoptive families (in which both children were adopted and genetically unrelated). Triads were videotaped in 6 play settings in their homes. In addition, each sibling pair was observed in an unstructured setting in the home, and mothers completed an interview about …
Genetic influence on tester-rated infant temperament as assessed by Bayley's Infant Behavior Record
Results are reported for the 1st sibling adoption study of temperament in infancy, using tester ratings on the Infant Behavior Record (IBR) at 1 and 2 years for a sample of 95 pairs of nonadoptive siblings and 80 pairs of adoptive siblings. Twin data reported by Matheny (1980) for 85 identical (MZ) and 50 fraternal (DZ) twin pairs on the same measure at the same ages were combined with the sibling adoption data in maximum-likehood model-fitting a…
Genetic mediation of the home environment during infancy
Infant predictors of preschool and adult IQ
The aim of this article is twofold. First, the usefulness of the midparent-midtwin design as a proxy for a longitudinal study was assessed. This design should prove effective in determining which of a nmber of infant measures are predictive of later IQ and thus are likely candidates for infant intelligence measures. Second, a true longitudinal study was conducted to examine the predictability of our infants measures in chidhood. Intelligence meas…
Adoption results for self-reported personality
Twin studies consistently indicate moderate genetic influence on individual differences in personality as assessed using self-report questionnaires, with heritability estimates typically about 40%. In this first analysis of self-report personality data from the longitudinal Colorado Adoption Project, little evidence is found for additive genetic influence in parent-offspring and sibling adoption analyses based on a foundation sample of 245 adopti…
Continuity and change in general cognitive ability from 1 to 7 years of age
Observed and latent sources of individual differences in cognitive development were explored in data from adopted and nonadopted siblings measured from 12 months to 7 years and identical and nonidentical twins measured from 12 to 36 months. Longitudinal path models, designed to examine the structure of observed stability and assess the genetic and environmental sources of age-to-age change and continuity, suggest that observed continuity arises f…
Home environment and cognitive ability of 7-year-old children in the Colorado Adoption Project
Family environment may be related to childhood cognitive abilities either directly through environmental transmission or indirectly through correlations with parental genotypes. Using the methodology of quantitative behavioral genetics, the magnitude of such effects can be determined. In this study, these relations were investigated using measures of home environment obtained from infancy through 7 years of age and WISC-R full scale IQ on a sampl…
Rapid assessment of infant predictors of adult IQ
Infant predictors of adult IQ were assessed with same-sex infant twins (114 pairs) and their parents. The midtwin-midparent design permits the rapid assessment of infant measures to predict later behavior, because the midparent score serves as a proxy for the infant's potential score at maturity. At 5, 7, and 9 months, Ss were observed on the Fagan Test of Infant Intelligence, hand preference, vocalizations, selected Bayley Scales of Infant Devel…
A genetic and environmental analysis of sensation seeking
Exploring the genetic etiology of low general cognitive ability from 14 to 36 months
The genetic and environmental etiology of low general cognitive ability (g) during infancy and early childhood has not previously been investigated. The current study examined the genetic etiology of low cognitive ability at 14, 20, 24, and 36 months with twins from the MacArthur Longitudinal Twin Study. Low g groups were formed from the lowest 10th percentile at each age. Univariate probandwise concordance rates and DeFries-Fulker (J. C. DeFries…
Genetic and environmental influences on cognition during childhood
A biometrical genetic approach to intelligence and schizophrenia
(1973). A biometrical genetic approach to intelligence and schizophrenia. Social Biology: Vol. 20, No. 3, pp. 266-275
Comparison of the biometrical genetical, Mava, and classical approaches to the analysis of the human behavior
A biometrical genetic approach to intelligence and schizophrenia
(1973). A biometrical genetic approach to intelligence and schizophrenia. Social Biology: Vol. 20, No. 3, pp. 266-275
Effect of Strain and Level of Shock on the Behaviour of Rats in PSI Experiments
Rats from five strains were tested for the ability precognitively to avoid three levels of shock. There were clear effects of shock and strain on the number of observed Random Behaviour Trials, with the Roman High Avoidance strain being the only one to maintain high levels of Random Behavior Trials at high levels of shock. However, there was no evidence for any psi ability in this experiment and this null result was not affected by either the str…
A genetic and environmental analysis of sensation seeking
Multivariate Familial Analysis of Cognitive Measures in the Colorado Family Reading Study
Multivariate path analysis is employed to examine the etiologies of variation and covariation of three composite cognitive measures in the Colorado Family Reading Study: reading ability, symbol-processing speed, and spatial/reasoning. Measures of phenotypic assortative and cross-assortative mating are incorporated in a multivariate analysis of familial resemblance within nuclear families. Phenotypic variances and covariances are partitioned into …
The Development and Validation of a Test Battery Measuring Specific Cognitive Abilities in Four-Year-Old Children
A battery of nine specific cognitive abilities tests to assess verbal, spatial, perceptual speed, and memory abilities in children at age 4 was constructed and administered to a sample of 267 children participating in the Colorado Adoption Project. Exploratory and confirmatory factor analyses revealed four correlated factors that adequately describe the covariation among the tests. Specific cognitive ability composites showed test-retest correlat…
Altruism and aggression
Five questionnaires measuring altruistic and aggressive tendencies were completed by 573 adult twin pairs of both sexes from the University of London Institute of Psychiatry Volunteer Twin Register. The questionnaires measured altruism, empathy, nurturance, aggressiveness, and assertiveness. The intraclass correlations for the five scales, respectively, were .53, .54, .49, .40, and .52 for 296 monozygotic pairs, and .25, .20, .14, .04, and .20 fo…
Home environment and cognitive ability of 7-year-old children in the Colorado Adoption Project
Family environment may be related to childhood cognitive abilities either directly through environmental transmission or indirectly through correlations with parental genotypes. Using the methodology of quantitative behavioral genetics, the magnitude of such effects can be determined. In this study, these relations were investigated using measures of home environment obtained from infancy through 7 years of age and WISC-R full scale IQ on a sampl…
Infant predictors of preschool and adult IQ
The aim of this article is twofold. First, the usefulness of the midparent-midtwin design as a proxy for a longitudinal study was assessed. This design should prove effective in determining which of a nmber of infant measures are predictive of later IQ and thus are likely candidates for infant intelligence measures. Second, a true longitudinal study was conducted to examine the predictability of our infants measures in chidhood. Intelligence meas…
Parent‐Offspring and Sibling Adoption Analyses of Parental Ratings of Temperament in Infancy and Childhood
A first step toward understanding the etiology of personality is to investigate the relative impact of genetic and environmental factors using twin and adoption designs. Twin studies of infants and young children indicate substantial genetic influence for parental ratings of temperament in the preschool years. Adoption studies, however, have not previously been reported during the early years of life. We present parent‐off spring comparisons for …
Genetic influence on tester-rated infant temperament as assessed by Bayley's Infant Behavior Record
Results are reported for the 1st sibling adoption study of temperament in infancy, using tester ratings on the Infant Behavior Record (IBR) at 1 and 2 years for a sample of 95 pairs of nonadoptive siblings and 80 pairs of adoptive siblings. Twin data reported by Matheny (1980) for 85 identical (MZ) and 50 fraternal (DZ) twin pairs on the same measure at the same ages were combined with the sibling adoption data in maximum-likehood model-fitting a…
Genetic mediation of the home environment during infancy
Continuity and change in general cognitive ability from 1 to 7 years of age
Observed and latent sources of individual differences in cognitive development were explored in data from adopted and nonadopted siblings measured from 12 months to 7 years and identical and nonidentical twins measured from 12 to 36 months. Longitudinal path models, designed to examine the structure of observed stability and assess the genetic and environmental sources of age-to-age change and continuity, suggest that observed continuity arises f…
Genetic and environmental influences on maternal and sibling interaction in middle childhood
Genetic and environmental influences on maternal and sibling interactions were examined in 67 mother-child-child triads from nonadoptive families and 57 mother-child-child triads from adoptive families (in which both children were adopted and genetically unrelated). Triads were videotaped in 6 play settings in their homes. In addition, each sibling pair was observed in an unstructured setting in the home, and mothers completed an interview about …
Rapid assessment of infant predictors of adult IQ
Rapid assessment of infant predictors of adult IQ
Infant predictors of adult IQ were assessed with same-sex infant twins (114 pairs) and their parents. The midtwin-midparent design permits the rapid assessment of infant measures to predict later behavior, because the midparent score serves as a proxy for the infant's potential score at maturity. At 5, 7, and 9 months, Ss were observed on the Fagan Test of Infant Intelligence, hand preference, vocalizations, selected Bayley Scales of Infant Devel…
Linkage between sexual orientation and chromosome Xq28 in males but not in females
Genetic and environmental influences on cognition during childhood
Comorbidity in hyperactive children
Exploring the genetic etiology of low general cognitive ability from 14 to 36 months
The genetic and environmental etiology of low general cognitive ability (g) during infancy and early childhood has not previously been investigated. The current study examined the genetic etiology of low cognitive ability at 14, 20, 24, and 36 months with twins from the MacArthur Longitudinal Twin Study. Low g groups were formed from the lowest 10th percentile at each age. Univariate probandwise concordance rates and DeFries-Fulker (J. C. DeFries…
Genotype–environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Genotype-environment correlations in late childhood and early adolescence
A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial b…
Adoption results for self-reported personality
Twin studies consistently indicate moderate genetic influence on individual differences in personality as assessed using self-report questionnaires, with heritability estimates typically about 40%. In this first analysis of self-report personality data from the longitudinal Colorado Adoption Project, little evidence is found for additive genetic influence in parent-offspring and sibling adoption analyses based on a foundation sample of 245 adopti…
Psychology (23 obras) · Developmental psychology (20 obras) · Cognitive Abilities and Testing (16 obras) · Cognition (10 obras) · Biology (8 obras) · Child and Adolescent Psychosocial and Emotional Development (8 obras) · Genetics (8 obras) · Genetics (8 obras) · Early Childhood Education and Development (7 obras) · Heritability (7 obras)