A contemporary method for developmental‐genetic analyses of age changes in intellectual abilities

References

• Albert , M. 1993 . Neuropsychological and neurophysical changes in healthy adult humans across the age range . Neurobiology of Aging , 14 : 623
   Google Scholar
• Allison , P. D. 1987 . “ Estimation of linear models with incomplete data ” . In Sociological Methodology, 1987 , Edited by: Clogg , C. C. Vol. 17 , 71 – 103 . San Francisco : Jossey‐Bass .
   Google Scholar
• Baker , L. A. , DeFries , J. C. and Fulker , D. W. 1983 . Longitudinal stability of cognitive ability in the Colorado Adoption Project . Child Development , 54 : 290 – 297 .
   Google Scholar
• Bank , L. and Jarvik , L. F. 1978 . “ A longitudinal study of aging human twins ” . In The genetics of aging , Edited by: Schneider , E. L. 303 – 333 . New York : Plenum .
   Google Scholar
• Block , J. B. 1968 . “ Hereditary components in the performance of twins on the WAIS ” . In Progress in Human Behavior Genetics , Edited by: Vandenberg , S. G. 221 – 228 . Baltimore : Johns Hopkins University Press .
   Google Scholar
• Blum , J. E. , Clark , E. T. and Jarvik , L. F. 1973 . “ The New York State Psychiatric Institute Study of Aging Twiris ” . In Intellectual functioning in adults , Edited by: Jarvik , L. F. , Eisdorfer , C. and Blum , J. 13 – 19 . New York : Springer .
   Google Scholar
• Blum , J. E. , Fosshage , J. L. and Jarvik , L. F. 1972 . Intellectual changes and sex differences in octogenarians: A twenty year longitudinal study of aging . Developmental Psychology , 7 : 178 – 187 .
   Google Scholar
• Blum , J. E. and Jarvik , L. F. Variations in intellectual decline as indicators of pathology: A longitudinal twin study . Proceedings of the 77th annual convention of the American Psychological Association . Vol. 4 , pp. 743 – 744 . (Part 2),
   Google Scholar
• Blum , J. E. and Jarvik , L. F. 1974 . Intellectual performance of octogenarians as a function of education and initial ability . Human Development , 17 : 364 – 375 .
   Google Scholar
• Boker , S. M. and McArdle , J. J. 1995 . Statistical vector field analysis applied to mixed cross‐sectional and longitudinal data . Experimental Aging Research , 21 : 77 – 93 .
   Google Scholar
• Boomsma , D. I. , Martin , N. G. and Molenaar , P. C. 1989 . Factor and simplex models for repeated measures: Application to two psychomotor measures of alcohol sensitivity in twins . Behavior Genetics , 19 : 79 – 96 .
   Google Scholar
• Botwinick , J. 1978 . Aging & behavior: A Comprehensive integration of research findings , New York : Springer .
   Google Scholar
• Bouchard , T. J. and McGue , M. 1981 . Familial studies of intelligence: A review . Science , 212 : 1055 – 1059 .
   Google Scholar
• Browne , M. and Cudeck , R. 1993 . “ Alternative ways of assessing model fit ” . In Testing Structural Equation Models , Edited by: Bollen , K. and Long , S. 136 – 162 . Beverly Hills, CA : Sage .
   Google Scholar
• Cattell , R. B. 1960 . The multiple abstract variance analysis equations and solutions for nature: nurture research on continuous variables . Psychological Review , 67 : 353 – 372 .
   Google Scholar
• Cattell , R. B. 1971 . Intelligence: Its structure, growth, and action , Boston : Houghton Mifflin .
   Google Scholar
• Cattell , R. B. 1982 . The inheritance of personality and ability: Research methods and findings , New York : Academic .
   Google Scholar
• Ceci , S. J. and Bruck , M. 1994 . “ The bio‐ecological theory of intelligence: A developmental‐contextual perspective ” . In Current Topics in Human Intelligence: Volume 4. Theories of Intelligence , Edited by: Detterman , D. K. Volume 4 , Norwood, NJ : Ablex .
   Google Scholar
• Chipeur , H. M. , Rovine , M. and Plomin , R. 1990 . LISREL modelling: Genetic and environmental influences on IQ revisited . Intelligence , 14 : 11 – 29 .
   Google Scholar
• Collins , L. and Horn , J. L. , eds. 1991 . Best methods for the analysis of change , Washington, DC : American Psychological Association .
   Google Scholar
• Dalton , T. C. and Bergenn , V. W. 1995 . Beyond heredity and environment: Myrtle McGraw and the maturation controversy , Boulder, CO : Westview .
   Google Scholar
• DeFries , J. C. , Johnson , R. C. , Kuse , A. R. , McClearn , G. E. , Plovina , J. , Vandenberg , S. G. and Wilson , J. R. 1979 . Familial resemblance for specific cognitive abilities . Behavior Genetics , 9 : 23 – 43 .
   Google Scholar
• Diggle , P. J. , Liang , K.‐Y. and Zeger , S. L. 1994 . Analysis of Longitudinal Data , New York : Oxford University Press .
   Google Scholar
• Dobzhansky , T. 1956 . What is an adaptive trait? . American Naturalist , 90 : 337 – 347 .
   Google Scholar
• Dolan , C. V. , Molenaar , P. C. M. and Boomsma , D. I. 1991 . Longitudinal genetic analyses of longitudinal means and covariance structure using the simplex model in LISREL . Behavior Genetics , 21 : 49 – 61 .
   Google Scholar
• Dwyer , J. H. , Feinleib , M. , Lippert , P. and Hoffmeister , H. 1992 . Statistical Models for Longitudinal Studies of Health , New York : Oxford University Press .
   Google Scholar
• Eaves , L. J. , Long , J. and Heath , A. C. 1986 . A theory of developmental change in quantitative phenotypes applied to cognitive development . Behavior Genetics , 16 : 143 – 162 .
   Google Scholar
• Eichorn , D. E. , Clausen , J. A. , Haan , N. , Honzik , M. A. and Mussen , P. H. , eds. 1981 . Past and Present in Middle Life , New York : Academic .
   Google Scholar
• Erlenmeyer‐Kimling , L. and Jarvik , L. F. 1963 . Genetics and intelligence: A review . Science , 142 : 1477 – 1479 .
   Google Scholar
• Falconer , D. S. 1989 . Introduction to quantitative genetics , 3rd ed. , New York : Longman .
   Google Scholar
• Featherman , D. L. , Lerner , R. M. and Perlmutter , M. , eds. 1994 . Life‐span development and behavior , Vol. 12 , Hillsdale, NJ : Lawrence Erlbaum Associates, Inc. .
   Google Scholar
• Finkel , D. , Pedersen , N. L. , McGue , M. and McClearn , G. E. 1995 . Heritability of cognitive abilities in adult twins: Comparison of Minnesota and Swedish data . Behavior Genetics , 25 : 421 – 432 .
   Google Scholar
• Fisher , R. A. 1918 . The correlation between relatives on the supposition of Mendelian inheritance . Transaction of the Royal Society (Edinburgh) , 52 : 399 – 433 .
   Google Scholar
• Flanagan , D. P. and McGrew , K. S. 1996 . “ A cross‐battery approach to assessing and interpreting cognitive abilities: Narrowing the gap between practice and cognitive science ” . In Beyond traditional intellectual assessment: Contemporary and emerging theories, tests and issues , Edited by: Flanagan , D. P. , Genshaft , J. L. and Harrison , P. L. 314 – 325 . New York : Guilford .
   Google Scholar
• Funder , C. D. , Parke , R. D. , Tomlinson‐Keasey , C. and Widaman , K. , eds. 1993 . Studying lives through time: Personality and development , Washington, DC : American Psychological Association .
   Google Scholar
• Galton , F. 1865 . Heredity, talent and character . Macmillan's Magazine , 12 : 157 – 166 . 318 – 327 .
   Google Scholar
• Gavrilov , L. A. and Gavrilova , N. S. 1991 . The biology of life span: A quantitative approach , Chur, , Switzerland : Harwood Academic .
   Google Scholar
• Goldberger , A. S. 1977 . “ Twin methods: A skeptical view ” . In Kinometrics: Determinants of socioeconomic success within and between families , Edited by: Taubman , P. 299 – 324 . Amsterdam : North‐Holland .
   Google Scholar
• Goldsmith , H. H. 1983 . Genetic influences on personality from infancy to adulthood . Child Development , 54 : 331 – 355 .
   Google Scholar
• Goldsmith , H. H. 1984 . “ Continuity of personality: A genetic perspective ” . In Continuities and discontinuities in development , Edited by: Emde , R. N. and Harmon , R. J. 403 – 413 . New York : Plenum .
   Google Scholar
• Goldsmith , H. H. and Gottesman , I. I. 1977 . An extension of construct validity for personality scales using twin‐based criteria . Journal of Research in Personality , 11 : 381 – 397 .
   Google Scholar
• Gottlieb , G. 1991 . Experiential canalization of behavioral development: Theory . Developmental Psychology , 27 : 4 – 13 .
   Google Scholar
• Hauspie , R. C. , Bergman , P , Bielicki , T. and Susanne , R. 1994 . Genetic variance in the pattern of the growth curve for height: A longitudinal analysis of male twins . Annals of Human Biology , 21 : 347 – 362 .
   Google Scholar
• Heath , A. C. , Kendler , K. S. , Eaves , L. J. and Markell , D. 1990 . The resolution of cultural and biological inheritance: Informativeness of different relationships . Behavior Genetics , 20 : 439 – 466 .
   Google Scholar
• Heath , A. C. , Neale , M. C. , Hewitt , J. K. , Eaves , L. J. and Fulker , D. W. 1989 . Testing structural equation models for twin data using LISREL . Behavior Genetics , 19 : 9 – 35 .
   Google Scholar
• Henderson , N. D. 1982 . Human behavior genetics . Annual Review of Psychology , 33 : 403 – 440 .
   Google Scholar
• Hewitt , J. K. , Eaves , L. J. , Neale , M. C. and Meyer , J. M. 1988 . Resolving causing of developmental continuity or tracking: I. Longitudinal twin studies during growth . Behavior Genetics , 18 : 133 – 151 .
   Google Scholar
• Hooke , R. 1988 . How to tell the liars from the statisticians , New York : Marcel Dekker .
   Google Scholar
• Horn , J. L. 1988 . “ Thinking about human abilities ” . In Handbook of multivariaite experimental psychology , 2nd ed. , Edited by: Nesselroade , J. R. and Cattell , R. B. 645 – 685 . New York : Plenum .
   Google Scholar
• Horn , J. L. and Cattell , R. B. 1966 . Refinement and test of the theory of fluid and crystallized intelligence . Journal of Educational Psychology , 57 : 253 – 270 .
   Google Scholar
• Horn , J. L. and Cattell , R. B. 1967 . Age differences in primary mental ability factors . Journal of Gerontology , 21 : 210 – 220 .
   Google Scholar
• Horn , J. L. and McArdle , J. J. 1980 . “ Perspectives on mathematical and statistical model building (MASMOB) in research on aging ” . In Aging in the 1980s: Psychological issues , Edited by: Poon , L. 503 – 541 . Washington, DC : American Psychological Association .
   Google Scholar
• Horn , I. L. and Moll , J. 1996 . “ Human cognitive capabilities: Gf‐Gc theory ” . In Beyond traditional intellectual assessment: Contemporary and emerging theories, tests and issues , Edited by: Flanagan , D. P. , Genshaft , J. L. and Harrison , P. L. 53 – 91 . New York : Guilford .
   Google Scholar
• Hsia , D. Y. , O'Flynn , M. E. and Berman , J. L. 1968 . Atypical phenylketonuria with borderline or normal intelligence . American Journal of Diseases of Children , 116 : 143 – 156 .
   Google Scholar
• Jacobson , M. 1991 . Developmental neurobiology , 3rd ed. , New York : Plenum .
   Google Scholar
• Jarvik , L. F. , Blum , J. E. and Varma , A. O. 1972 . Genetic components and intellectual functioning during senescence: A 20‐year study of aging twins . Behavior Genetics , 2 : 159 – 171 .
   Google Scholar
• Jarvik , L. F. , Eisdorfer , C. and Blum , J. E. , eds. 1973 . Intellectual functioning in adults: Psychological and biological influences , New York : Springer .
   Google Scholar
• Jarvik , L. F. , Kallman , F. J. and Falek , A. 1962 . Intellectual changes in aged twins . Journal of Gerontology , 17 : 289 – 294 .
   Google Scholar
• Jarvik , L. F. , Kallman , F. J. , Lorge , I. and Falek , A. 1962 . “ Longitudinal study of intellectual changes in senescent twins ” . In Social and psychological aspects of aging , Edited by: Tibbitts , C. and Donahue , W. 839 – 859 . New York : Columbia University Press .
   Google Scholar
• Johnson , R. C. , McClearn , G. E. , Yuen , S. , Nagoshi , C. , Ahern , F. M. and Cole , R. E. 1985 . Galton's data a century later . American Psychologist , 40 : 875 – 892 .
   Google Scholar
• Jones , M. C. , Bayley , N. , Macfarlane , J. W. and Honzik , M. P. , eds. 1971 . The course of human development , New York : Wiley .
   Google Scholar
• Jöreskog , K. G. and Sörbom , D. 1988 . LISREL VII: A guide to the program and applications , Chicago : SPSS Inc. .
   Google Scholar
• Kallman , F. J. , Feingold , L. and Bondy , E. 1951 . Comparative adaptational, social, and psychometric data on the life histories of senescent twin pairs . American Journal of Human Genetics , 3 : 65 – 73 .
   Google Scholar
• Kempthorne , O. 1978 . Logical, epistemological and statistical aspects of nature‐nurture data interpretation . Biometrics , 34 : 1 – 23 .
   Google Scholar
• Kohs , S. C. 1923 . Intelligence measurement: A psychological and statistical study based upon the blocks‐design tests , New York : Macmillan .
   Google Scholar
• Lange , K. , Westlake , J. and Spence , M. A. 1976 . Extensions to pedigree analysis: III. Variance components by the scoring method . Annals of Human Genetics , 39 : 485 – 491 .
   Google Scholar
• Lezak , M. D. 1976 . Neuropsychological assessment , New York : Oxford University Press .
   Google Scholar
• Lindsey , J. K. 1993 . Models for repeated measurements , New York : Oxford University Press .
   Google Scholar
• Little , R. T. A. and Rubin , D. B. 1987 . Statistical analysis with missing data , New York : Wiley .
   Google Scholar
• Loehlin , J. C. 1984 . R. B. Cattell and behavior genetics . Multivariate Behavioral Research , 19 : 337 – 343 .
   Google Scholar
• Loehlin , J. C. 1992 . Genes and environment in personality development , Newbury Park, CA : Sage .
   Google Scholar
• Loehlin , J. G. , Horn , J. M. and Willerman , L. 1989 . Modeling IQ change: Evidence from the Texas adoption project . Child Development , 60 : 993 – 1004 .
   Google Scholar
• Lytton , H. , Watts , D. and Dunn , B. 1988 . Stability of genetic determination from age 2 to 9: A longitudinal twin study . Social Biology , 35 : 1 – 2 . 62 – 73 .
   Google Scholar
• Martin , N. G. and Eaves , L. J. 1977 . The genetical analysis of covariance structure . Heredity , 138 : 79 – 95 .
   Google Scholar
• Matarazzo , J. D. 1980 . Wechsler's measurement and appraisal of adult intelligence , New York : Oxford University Press .
   Google Scholar
• McArdle , J. J. 1986 . Latent variable growth within behavior genetic models . Behavior Genetics , 16 : 163 – 200 .
   Google Scholar
• McArdle , J. J. 1994 . Structural factor analysis experiments with incomplete data . Multivariate Behavioral Research , 29 : 409 – 454 .
   Google Scholar
• McArdle , J. J. 1996 . Current directions in structural factor analysis . Current Directions in Psychological Science , 5 : 10 – 17 .
   Google Scholar
• McArdle , J. J. and Boker , S. M. 1990 . RAMpath: A computer program for automatic path diagrams , Hillsdale, NJ : Lawrence Erlbaum Associates, Inc. .
   Google Scholar
• McArdle , J. J. and Cattell , R. B. 1995 . Structural equation models of factorial invariance applied to parallel proportional profiles and confactor problems . Multivariate Behavioral Research , 29 : 63 – 113 .
   Google Scholar
• McArdle , J. J. , Connell , J. and Goldsmith , H. H. 1980 . Latent variable approaches to measurement, structure, longitudinal stability, and genetic influences: Preliminary results from the study of behavioral style . Behavior Genetics , 10 : 609
   Google Scholar
• McArdle , J. J. and Goldsmith , H. H. 1984 . Multivariate biometric models of the WAIS . Behavior Genetics , 14 : 609
   Google Scholar
• McArdle , J. J. and Goldsmith , H. H. 1990 . Some alternative structural equation models for multivariate biometric analyses . Behavior Genetics , 20 : 569 – 608 .
   Google Scholar
• McArdle , J. J. , Goldsmith , H. H. and Horn , J. L. 1981 . Genetic structural equation models of fluid & crystallized intelligence . Behavior Genetics , 11 : 607
   Google Scholar
• McArdle , J. J. and Hamagami , F. 1991 . “ Modeling incomplete longitudinal data using latent growth structural equation models ” . In Best methods for the analysis of change , Edited by: Collins , L. and Horn , J. L. 276 – 304 . Washington, DC : American Psychological Association .
   Google Scholar
• McArdle , J. J. and Hamagami , F. 1992 . Modeling incomplete longitudinal and cross‐sectional data using latent growth structural models . Experimental Aging Research , 18 : 145 – 166 .
   Google Scholar
• McArdle , J. J. and Hamagami , F. 1996 . “ Multilevel models from a multiple group structural equation perspective ” . In Advanced structural equation modeling: Issues and techniques , Edited by: Marcoulides , G. and Schumacker , R. 89 – 124 . Mahwah, NJ : Lawrence Erlbaum Associates, Inc. .
   Google Scholar
• McArdle , J. J. and Horn , J.L. 1997 . A megaanalysis of the WAIS: Adult intelligence across the life‐span , University of Virginia . Unpublished manuscript,
   Google Scholar
• McArdle , J. J. and Prescott , C. A. Synthesizing twin, family and adoption studies of intellectual ability using WAIS data . Paper presented at the annual meeting of the Behavior Genetics Associatior . Aussois, France. June .
   Google Scholar
• McArdle , J. J. and Prescott , C. A. 1992 . Age‐based construct validation using structural equation modeling . Experimental Aging Research , 18 : 87 – 115 .
   Google Scholar
• McArdle , J. J. and Prescott , C. A. 1996 . “ Contemporary models for the biometric genetic analysis of intellectual abilities ” . In Beyond traditional intellectual assessment: Contemporary and emerging theories, tests and issues , Edited by: Flanagan , D. P. , Genshaft , J. L. and Harrison , P. L. 403 – 436 . New York : Guilford .
   Google Scholar
• McArdle , J. J. and Woodcock , R. W. 1997 . Expanding test‐retest designs to include developmental time‐lag components . Psychological Methods , 2 (4) : 403 – 435 .
   Google Scholar
• McClearn , G. E. , Johansson , B. , Berg , S. , Pedersen , N. L. , Ahem , F. , Petrill , S. A. and Plomin , R. 1997 . Substantial genetic influence on cognitive abilities in twins 80 or more years old . Science , June 6 : 1560 – 1563 .
   Google Scholar
• McGue , M. and Bouchard , T. J. 1984 . Adjustment of twin data for the effects of age and sex . Behavior Genetics , 14 : 325 – 343 .
   Google Scholar
• McGue , M. , Bcuchard , T. J. , Iacono , W. G. and Lykken , D. T. 1993 . “ Behavioral genetics of cognitive ability: A life‐span perspective ” . In Nature, Nurture & Psychology , Edited by: Plomin , R. and McClearn , G. E. 59 – 76 . Washington, DC : APA Press .
   Google Scholar
• McNemar , Q. 1942 . The revision of the Stanford‐Binet scale , Boston : Houghton Mifflin .
   Google Scholar
• Neale , M. 1994 . Mx: Statistical modeling , Richmond, VA : Author . [Computer program].
   Google Scholar
• Neale , M. C. and Cardon , L. R. 1992 . Methodology for genetic studies of twins and families , London : Kluwer Academic .
   Google Scholar
• Neale , M. C. , Heath , A. C. , Hewitt , J. K. , Eaves , L. J. and Fulker , D. W. 1989 . Fitting genetic models with LISREL: Hypothesis testing . Behavior Genetics , 19 : 37 – 49 .
   Google Scholar
• Nesselroade , J. R. and Bakes , P. B. , eds. 1979 . Longitudinal research in the study of behavior and development , New York : Academic .
   Google Scholar
• Nesselroade , J. R. and McArdle , J. J. 1997 . “ On the mismatching of levels of abstraction in mathematical‐statistical model fitting ” . In Life‐span developmental psychology: Biological and neuropsychological mechanisms , Edited by: Reese , H. W. and Franzen , M. D. 23 – 49 . Mahwah, NJ : Lawrence Erlbaum Associates, Inc. .
   Google Scholar
• Nesselroade , J. R. and Thompson , W. W. 1995 . Selection and related threats to group comparison: An example comparing factorial structures of higher and lower ability groups of adult twins . Psychological Bulletin , 117 : 271 – 284 .
   Google Scholar
• Pedersen , N. L. and Harris , J. H. 1991 . “ Developmental behavioral genetics and successful aging ” . In Successful aging: Perspectives from the behavioral sciences , Edited by: Baltes , P. B. and Baltes , M. M. 359 – 380 . Cambridge, , England : Cambridge University Press .
   Google Scholar
• Pedersen , N. L. , Plomin , R. and McClearn , G. E. 1994 . Is there G beyond g? . Intelligence , 18 : 133 – 143 .
   Google Scholar
• Pedersen , N. L. , Plomin , R. , Nesselroade , J. R. and McClearn , G. E. 1992 . A quantitative genetic analysis of cognitive abilities during the second half of the life‐span . Psychological Science , 3 : 346 – 353 .
   Google Scholar
• Phillips , K. and Fulker , D. W. 1989 . Quantitative genetic analysis of longitudinal trends in adoption designs with application to IQ in the Colorado Adoption Project . Behavior Genetics , 19 : 621 – 658 .
   Google Scholar
• Plomin , R. 1986 . Development, genetics, and psychology , Hillsdale, NJ : Lawrence Erlbaum Associates, Inc. .
   Google Scholar
• Plomin , R. and DeFries , J. C. 1980 . Genetics and intelligence: A review . Intelligence , 4 : 15 – 24 .
   Google Scholar
• Plomin , R. , DeFries , J. C. and Fulker , D. W. 1988 . Nature and nurture during infancy and early childhood , New York : Cambridge University Press .
   Google Scholar
• Plomin , R. , Pedersen , N. L. , Lichtenstein , P. and McClearn , G. E. 1994 . Variability and stability in cognitive abilities are largely genetic later in life . Behavior Genetics , 24 : 207 – 216 .
   Google Scholar
• Reznick , J. S. , Corley , R. and Robinson , J. 1997 . A longitudinal twin study of intelligence in the second year . Monographs of the Society for Research in Child Development , 62 ( 1 ) Serial No. 249
   Google Scholar
• Rogosa , D. R. and Willett , J. B. 1985 . Understanding correlates of change by modeling individual differences in growth . Psychometrika , 50 : 203 – 228 .
   Google Scholar
• Scarr , S. 1971 . Unknowns in the IQ equation: A review of three monographs . Science , 174 : 1223 – 1228 .
   Google Scholar
• Scarr , S. and Weinberg , R. A. 1978 . The influence of “family background”; on intellectual attainment . American Sociological Review , 43 : 674 – 692 .
   Google Scholar
• Schaie , K. W. 1996 . Intellectual development in adulthood , Cambridge, , England : Cambridge University Press .
   Google Scholar
• Schaie , K. W. , Anderson , V. E. , McClearn , G. E. and Money , J. , eds. 1975 . Developmental human behavior genetics , Lexington, MA : Lexington .
   Google Scholar
• Schneider , E. L. , ed. 1978 . The genetics of aging , New York : Plenum .
   Google Scholar
• Sontag , L. W. , Baker , C. T. and Nelson , V. L. 1958 . Mental growth and personality development: A longitudinal study . Monographs of the Society for Research in Child Development , 25 ( 2 ) Serial No. 68
   Google Scholar
• Steuer , J. , LaRue , A. , Blum , J. and Jarvik , L. F. 1981 . Critical loss in the eighth and ninth decades . Journal of Gerontology , 36 : 211 – 213 .
   Google Scholar
• Tambs , K. , Sundet , J. M. and Magnus , P. 1986 . Genetic and environmental contributions to the covariation between the Wechsler Adult Intelligence Scale (WAIS) subtests . Behavior Genetics , 16 : 475 – 491 .
   Google Scholar
• Tanner , J. M. , ed. 1960 . Human growth , Elmsford, NY : Pergamon .
   Google Scholar
• Vandenberg , S. G. and Falkner , F. 1965 . Heredity factors in human growth . Human Biology , 37 : 357 – 365 .
   Google Scholar
• Waddington , C. H. 1962 . New patterns in genetics and development , New York : Columbia University Press .
   Google Scholar
• Wechsler , D. 1939 . Wechsler‐Bellevue intelligence scale , New York : Psychological Corporation .
   Google Scholar
• Wechsler , D. 1955 . Manual for the Wechsler Adult Intelligence Scale , New York : Psychological Corporation .
   Google Scholar
• Wilson , R. 1978 . Synchronies in mental development: An epigenetic perspective . Science , 202 : 939 – 948 .
   Google Scholar
• Wilson , R. 1933 . The Louisville Twin Study: Developmental synchronies in behavior . Child Development , 54 : 298 – 316 .
   Google Scholar
• Wilson , R. 1986 . Continuity and change in cognitive ability profile . Behavior Genetics , 16 : 45 – 60 .
   Google Scholar
• Woodcock , R. W. 1990 . Theoretical foundations of the WJ‐R measures of cognitive ability . Journal of Psycho‐Educational Assessment , 8 : 231 – 258 .
   Google Scholar
• Wright , S. 1921 . Correlation and causality . Journal of Agricultural Research , 20 : 557 – 585 .
   Google Scholar
• Wright , S. 1934 . The method of path coefficients . Annals of Mathematical Statistics , 5 : 161 – 215 .
   Google Scholar