IQ predicts many measures of life success, as well as trajectories of brain development. Prolonged cortical thickening observed in individuals with high IQ might reflect an extended period of synaptogenesis and high environmental sensitivity or plasticity. We tested this hypothesis by examining the timing of changes in the magnitude of genetic and environmental influences on IQ as a function of IQ score. We found that individuals with high IQ show high environmental influence on IQ into adolescence (resembling younger children), whereas individuals with low IQ show high heritability of IQ in adolescence (resembling adults), a pattern consistent with an extended sensitive period for intellectual development in more-intelligent individuals. The pattern held across a cross-sectional sample of almost 11,000 twin pairs and a longitudinal sample of twins, biological siblings, and adoptive siblings.

Bartels M., Rietveld M. J. H., Van Baal G. C. M., Boomsma D. I. (2002). Genetic and environmental influences on the development of intelligence. Behavior Genetics, 32, 237249. , Google Scholar
Bayley N. (1969). Manual for the Bayley Scales of Infant Development. New York, NY: Psychological Corp. , Google Scholar
Bjorkland D. F. (1997). The role of immaturity in human development. Psychological Bulletin, 122, 153169. , Google Scholar
Boomsma D. I., van Beijsterveld T. C. E. M., Beem A. L., Hoekstra R. A., Polderman T. J. C., Bartels M. (2008). Intelligence and birth order in boys and girls. Intelligence, 36, 630634. , Google Scholar
Brans R. G. H., Kahn R. S., Schnack H. G., van Baal G. C. M., Posthuma D., van Haren N. E. M., . . . Hulshoff Pol H. E. (2010). Brain plasticity and intellectual ability are influenced by shared genes. The Journal of Neuroscience, 30, 55195524. , Google Scholar
Brant A. M., Haberstick B. C., Corley R. P., Wadsworth S. J., DeFries J. C., Hewitt J. K. (2009). The developmental etiology of high IQ. Behavior Genetics, 39, 393405. , Google Scholar
Cherny S. S., Cardon L. R., Fulker D. W., DeFries J. C. (1992). Differential heritability across levels of cognitive ability. Behavior Genetics, 22, 153162. , Google Scholar
Deary I. J., Whalley L. J., Lemmon H., Crawford J. R., Starr J. M. (2000). The stability of individual differences in mental ability from childhood to old age: Follow-up of the 1932 Scottish Mental Survey. Intelligence, 28, 4955. , Google Scholar
DeFries J. C., Plomin R., Fulker D. W. (Eds.). (1994). Nature and nurture in middle childhood. Cambridge, MA: Blackwell. , Google Scholar
Gottfredson L. S. (1997). Why g matters: The complexity of everyday life. Intelligence, 24, 79132. , Google Scholar
Haberstick B. C., Smolen A. (2004). Genotyping of three single nucleotide polymorphisms following whole genome preamplification of DNA collected from buccal cells. Behavior Genetics, 36, 541547. , Google Scholar
Haworth C. M. A., Wright M. J., Luciano M., Martin N. G., de Geus E. J. C., van Beijsterveldt C. E. M., . . . Plomin R. (2010). The heritability of general cognitive ability increases linearly from childhood to young adulthood. Molecular Psychiatry, 15, 11121120. , Google Scholar
Haworth C. M. A., Wright M. J., Martin N. W., Martin N. G., Boomsma D. I., Bartels M., . . . Plomin R. (2009). A twin study of the genetics of high cognitive ability selected from 11,000 twin pairs in six studies from four countries. Behavior Genetics, 39, 359370. , Google Scholar
Jackson D. N. (1998). Multidimensional Aptitude Battery II: Manual. Port Huron, MI: Sigma Assessment Systems. , Google Scholar
Knudsen E. I. (2004). Sensitive periods in the development of the brain and behavior. Journal of Cognitive Neuroscience, 16, 14121425. , Google Scholar
Kohler H. P., Rodgers J. L. (2001). DF-analyses of heritability with double-entry twin data: Asymptotic standard errors and efficient estimation. Behavior Genetics, 31, 179191. , Google Scholar
Lenroot R. K., Schmitt J. E., Ordaz S. J., Wallace G. L., Neale M. C., Lerch J. P., . . . Giedd J. N. (2009). Differences in genetic and environmental influences on the human cerebral cortex associated with development during childhood and adolescence. Human Brain Mapping, 30, 163174. , Google Scholar
Lynn R., Kanazawa S. (2011). A longitudinal study of sex differences in intelligence at ages 7, 11 and 16 years. Personality and Individual Differences, 51, 321324. , Google Scholar
Neisser U., Boodoo G., Bouchard T. J.Jr., Boykin A. W., Brody N., Ceci S. J., . . . Urbina S. (1996). Intelligence: Knowns and unknowns. American Psychologist, 5, 77101. , Google Scholar
Newport E. (1990). Maturational constraints on language learning. Cognitive Science, 14, 1128. , Google Scholar CrossRef
Petanjek Z., Judac M., Šimić G., Rašin M. R., Uylings H. B. M., Rakic P., Kostović I. (2011). Extraordinary neoteny of synaptic spines in the human prefrontal cortex. Proceedings of the National Academy of Sciences, USA, 108, 1328113286. , Google Scholar
Plomin R. (1986). Development, genetics and psychology. Hillsdale, NJ: Erlbaum. , Google Scholar
Plomin R., DeFries J. C., Loehlin J. C. (1977). Genotype-environment interaction and correlation in the analysis of human behavior. Psychological Bulletin, 84, 309332. , Google Scholar
Raven J. C., Court J. H. (2004). Manual for Raven’s Progressive Matrices and Vocabulary Scales. San Antonio, TX: Pearson Assessment. , Google Scholar
Rhea S.-A., Gross A. A., Haberstick B. C., Corley R. P. (2006). Colorado Twin Registry. Twin Research and Human Genetics, 9, 941949. , Google Scholar
Rougier N. P., Noelle D., Braver T. S., Cohen J. D., O’Reilly R. C. (2005). Prefrontal cortex and the flexibility of cognitive control: Rules without symbols. Proceedings of the National Academy of Sciences, USA, 102, 73387343. , Google Scholar
Shaw P., Greenstein D., Lerch J., Clasen L., Lenroot R., Gogtay N., . . . Giedd J. (2006). Intellectual ability and cortical development in children and adolescents. Nature, 440, 676679. , Google Scholar Medline
Shaw P., Kabani N. J., Lerch J. P., Eckstrand K., Lenroot R., Gogtay N., . . . Wise S. P. (2008). Neurodevelopmental trajectories of the human cerebral cortex. The Journal of Neuroscience, 28, 35863594. , Google Scholar
Tau G. Z., Peterson B. S. (2010). Normal development of brain circuits. Neuropsychopharmacology, 35, 147168. , Google Scholar
Terman L. M., Merrill M. A. (1973). Stanford-Binet Intelligence Scale, Form L-M. Boston, MA: Houghton Mifflin. , Google Scholar
Thompson-Schill S. L. (2009). Cognition without control: When a little frontal lobe goes a long way. Current Directions in Psychological Science, 18, 259263. , Google Scholar Abstract
Wechsler D. (1974). Wechsler Intelligence Scale for Children–Revised. San Antonio, TX: Psychological Corp. , Google Scholar
Wechsler D. (1981). Manual for the Wechsler Adult Intelligence Scale–Revised (WAIS-R). New York, NY: Psychological Corp. , Google Scholar
Wechsler D. (1991). Wechsler Intelligence Scale for Children–Third Edition. San Antonio, TX: Psychological Corp. , Google Scholar
Wechsler D. A. (1997). Wechsler Adult Intelligence Scale (3rd ed.). San Antonio, TX: Psychological Corp. , Google Scholar
Whalley L. J., Deary I. J. (2001). Longitudinal cohort study of childhood IQ and survival up to age 76. British Medical Journal, 322, 819822. , Google Scholar

Vol 24, Issue 8, 2013

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The Nature and Nurture of High IQ

Angela M. Brant1, 2, Yuko Munakata2, Dorret I. Boomsma3, John C. DeFries4, Claire M. A. Haworth5, Matthew C. Keller4, Nicholas G. Martin6, Matthew McGue7, Stephen A. Petrill8, Robert Plomin5, Sally J. Wadsworth4, Margaret J. Wright6, John K. Hewitt4Department of Psychology, The Pennsylvania State UniversityDepartment of Psychology and Neuroscience, University of Colorado at BoulderDepartment of Biological Psychology, VU University AmsterdamInstitute for Behavioral Genetics, University of Colorado at BoulderMRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College LondonQueensland Institute of Medical Research, Royal Brisbane Hospital, Herston, Queensland, AustraliaPsychology Department, University of MinnesotaDepartment of Human Development and Family Science, The Ohio State University


Psychological Science

Vol 24, Issue 8, pp. 1487 - 1495

First published date: July-01-2013


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Angela M. Brant, Yuko Munakata, Dorret I. Boomsma, John C. DeFries, Claire M. A. Haworth, Matthew C. Keller, Nicholas G. Martin, Matthew McGue, Stephen A. Petrill, Robert Plomin, Sally J. Wadsworth, Margaret J. Wright, John K. Hewitt
Psychological Science 2013 24:8, 1487-1495

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