The number of years of education an individual completes is related to their future morbidity and mortality. There are obvious drivers for educational attainment such as childhood intellect, parental intelligence and education attainment, as well as socioeconomic status; and associations may be age-dependent. We investigated associations between intelligence across childhood (collected at two, four, seven and between eleven and thirteen years) and educational attainment (total years) by the late 20s in the Port Pirie Cohort Study, taking into account maternal intelligence, parental schooling and occupational prestige.
There were 388 individuals from the population-based longitudinal Port Pirie Cohort Study (South Australia) who provided educational attainment data in the 2008-9 data collection wave. A Structural Equation Model was employed to test associations between educational attainment and childhood cognitive/IQ measures, taking into account parental factors of IQ, schooling and socioeconomic status.
The vast majority of variables displayed significant simple correlations with each other in expected directions, e.g. child cognitive/IQ measures with maternal IQ. In the full structural equation model, paternal schooling and child intelligence at seven years were the only variables significantly related to educational attainment by the late 20s; maternal intelligence was strongly associated with early life but not adolescent intelligence.
These findings highlight the complex inter-generational transmission of social advantages, and substantiate the independent effects of education and intelligence on later morbidly and mortality.
- 2011). Trait complexes and academic achievement: Old and new ways of examining personality in educational contexts. British Journal of Educational Psychology, 81(1), 27–40.
- 1939). The limitations of infant and preschool tests in the measurement of intelligence. Journal of Psychology, 8, 351–373.
- 1985). Some characteristics and correlates of blood lead in early childhood: Preliminary results from the Port Pirie Study. Environmental Research, 38(1), 24–30.
- 1992). Environmental exposure to lead and children's intelligence at the age of seven years. New England Journal of Medicine, 327(18), 1279–1284.
- 2002). Genetic and environmental influences on the development of intelligence. Behavioral Genetics, 32(4), 237–249.
- 2010). Intelligence, education, and mortality. British Medical Journal, 340, c563.
- 1933). Mental growth during the first three years. Genetic Psychology Monographs, 14, 1–92.
- 1955). On the growth of intelligence. American Psychologist, 10(12), 805–818.
- 1969). Bayley scales of infant development. New York: The Psychological Corporation.
- 2013). Childhood intelligence is heritable, highly polygenic and associated with FNBP1L. Molecular Psychiatry, 19, 253–258.
- ALSPAC Study Team. (2006). Stability in cognition across early childhood: A developmental cascade. Psychological Science, 17(2), 151–158.
- 2001). Stability and change in children's intelligence quotient scores: A comparison of two socioeconomically disparate communities. American Journal of Epidemiology, 154(8), 711–717.
- 2012). Multivariate genetic analyses of cognition and academic achievement from two population samples of 174,000 and 166,000 school children. Behavioral Genetics, 42(5), 699–710.
- 2006). Childhood IQ in relation to obesity and weight gain in adult life: The National Child Development (1958) Study. International Journla of Obesity, 30(9), 1422–1432.
- 2012). Benefits of educational attainment on adult fluid cognition: International evidence from three birth cohorts. International Journal of Epidemiology, 41(6), 1729–1736.
- 1984). The measurement of social class. Community Health Studies, 8(2), 218–222.
- 2012). Intelligence. Annual Review of Psychology, 63(1), 453–482.
- 2010). Intelligence and education: Causal perceptions drive analytic processes and therefore conclusions. International Journal of Epidemiology, 39(5), 1362–1369.
- 2007). Intelligence and educational achievement. Intelligence, 35(1), 13–21.
- 2006). Effect of breast feeding on intelligence in children: Prospective study, sibling pairs analysis, and meta-analysis. British Medical Journal, 333(7575), 945.
- EClipSE. (2010). Education, the brain and dementia: Neuroprotection or compensation? Brain: A Journal of Neurology, 133(8), 2210–2216.
- 2005). Show me the child at seven II: Childhood intelligence and later outcomes in adolescence and young adulthood. Journal of Child Psychology and Psychiatry, 46(8), 850–858.
- 2012). Personality, age, and fluid intelligence. Australian Journal of Psychology, 64, 128–137.
- 2008). Locus of control at age 10 years and health outcomes and behaviors at age 30 years: The 1970 British Cohort Study. Psychosomatic Medicine, 70(4), 397–403.
- 2009). Intelligence in girls and their subsequent smoking behaviour as mothers: The 1958 National Child Development Study and the 1970 British Cohort Study. International Journal of Epidemiology, 38(1), 173–181.
- 2005). Poor predictive validity of the Bayley scales of infant development for cognitive function of extremely low birth weight children at school age. Pediatrics, 116(2), 333–341.
- 2011). Childhood socioeconomic status and adult health: Comparing formative and reflective models in the Aberdeen Children of the 1950s Study (prospective cohort study). Journal of Epidemiology and Community Health, 65(11), 1024–1029.
- 2010). Location in cognitive and residential space at age 70 reflects a lifelong trait over parental and environmental circumstances: The Lothian Birth Cohort 1936. Intelligence, 38(4), 402–411.
- 1982). Predicting later mental performance for normal, at-risk, and handicapped infants. Life-span Development and Behavior, 4, 33–61.
- 2009). The association of early IQ and education with mortality: 65 year longitudinal study in Malmö (p. 339). Sweden: British Medical Journal.
- 2012). Social origin, schooling and individual change in intelligence during childhood influence long-term mortality: A 68-year follow-up study. International Journal of Epidemiology, 41(2), 398–404.
- 2006). Childhood intelligence, educational attainment and adult body mass index: Findings from a prospective cohort and within sibling-pairs analysis. International Journal of Obesity, 30(12), 1758–1765.
- 2008). Association of childhood intelligence with risk of coronary heart disease and stroke: Findings from the Aberdeen Children of the 1950s cohort study. European Journal of Epidemiology, 23(10), 695–706.
- 1977). Childhood IQ's as predictors of adult educational and occupational status. Science, 197(4302), 482–483.
- 2013). Prospective associations between childhood low-level lead exposure and adult mental health problems: The Port Pirie cohort study. Neurotoxicology, 39(0), 11–17.
- 1985). The Port Pirie cohort study. Blood lead concentrations in early childhood. Medical Journal of Australia, 143(11), 499–503.
- 1988). Port Pirie Cohort Study: Environmental exposure to lead and children's abilities at the age of four years. New England Journal of Medicine, 319(8), 468–475.
- 1972). Manual for the McCarthy scales of children's abilities. New York: Psychological Corporation.
- 1993). The natural history of change in intellectual performance: Who changes? How much? Is it meaningful? Child Psychology & Psychiatry & Allied Discipline, 34(4), 455–506.
- 2009). Intellectual ability in early adulthood and type 2 diabetes in later life. Acta Diabetologica, 46(3), 249–252.
- 2011). The association between observed non-verbal maternal responses at 12 months and later infant development at 18 months and IQ at 4 years: A longitudinal study. Infant Behavior and Development, 34(4), 525–533.
- 2004). Genetic and environmental contributions to general cognitive ability through the first 16 years of life. Developmental Psychology, 40(5), 805–812.
- 1995). Intelligence and education as predictors of cognitive state in late life: A 50-year follow-up. Neurology, 45(8), 8 1446–8 1450.
- 2009). IQ in childhood and the metabolic syndrome in middle age: Extended follow-up of the 1946 British Birth Cohort Study. Intelligence, 37(6), 567–572.
- 2011). Children's socio-emotional, physical, and cognitive outcomes: Do they share the same drivers? Australian Journal of Psychology, 63, 56–74.
- 1997). The effects of intelligence and education on the development of dementia. A test of the brain reserve hypothesis. Psychological Medicine, 27(06), 1337–1344.
- 2011). Longitudinal predictors of adult socioeconomic attainment: The roles of socioeconomic status, academic competence, and mental health. Development and Psychopathology, 23(01), 315–324.
- 2007). Intelligence and socioeconomic success: A meta-analytic review of longitudinal research. Intelligence, 35(5), 401–426.
- 1996). Lifetime exposure to environmental lead and children's intelligence at 11–13 years: The Port Pirie cohort study. British Medical Journal, 312(7046), 1569–1575.
- 1998). Declining blood lead levels and changes in cognitive function during childhood: The Port Pirie Cohort Study. Journal of the American Medical Association, 280(22), 1915–1919.
- 1985). The Port Pirie Study: A prospective study of pregnancy outcome and early childhood growth and development in a lead-exposed community—Protocol and status report. Environmental Research, 38(1), 19–23.
- 1974). Wechsler Intelligence Scale for Children-Revised. New York: Psychological Corporation.
- 1981). Wechsler Adult Intelligence Scale-Revised. San Antonio, TX: Psychological Corporation.
- 2009). Educational attainment and cognitive decline in old age. Neurology, 72(5), 460–465.
- 2013). Childhood intelligence and adult health: The mediating roles of education and socioeconomic status. Intelligence, 41(5), 490–500.
- 2010). Intelligence in relation to obesity: A systematic review and meta-analysis. Obesity Reviews, 11(9), 656–670.