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Genetics and general cognitive ability (g)
Abstract
Two recent articles in this journal made the case for the existence and importance of g and reviewed research on cognitive and psychophysical correlates of psychometric g. This review considers g from a genetic perspective. Multivariate genetic research indicates that g accounts for nearly all of the genetic variance of diverse psychometric cognitive tests (genetic g). Recent research suggests not only that elementary cognitive tasks are genetically linked to psychometric g but also that genetic g pervades these tasks. Contrary to the assumption of modularity that dominates cognitive science, genetic g exists in the mind as well as in psychometric tests.
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“Twin research on cognitive ability has also estimated that a substantial portion of the individual differences in performance of tests measuring cognitive ability is heritable (around 50%; Plomin and Spinath, 2002).”
From Deliberate Practice and Proposed Limits on the Effects of Practice on the Acquisition of Expert Performance: Why the Original Definition Matters and Recommendations for Future Research (2019) · cites this paper as Plomin and Spinath, 2002
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“According to existing research, the influencing factors of children’s cognitive ability mainly include genetic factors and environmental factors[vii][viii]（Plomin, 1999; Petrill, 2004.”
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“Another branch of literature has examined the association between cognitive abilities and genetic factors (McGue et al., 1993; Plomin and Spinath, 2002).”
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“Moreover, hereditability values are said to increase with age (Plomin & Spinath, 2002; Deary, Penke & Johnson, 2010; Haworth, Wright, Luciano, Martin, et al., 2010; Kovas, Voronin, Kaydalov, Malykh, et al., 2013).”
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“Bivariate analyses revealed that most of the phenotypic variance between g and mental speed was due to genetic factors, suggesting not only that elementary cognitive tasks are genetically linked to psychometric (g) but also that genetic g pervades these tasks (Plomin & Spinath, 2002).”
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“The heritability of cognitive ability in childhood is well established (Bradley & Corwyn, 2002; Plomin & Spinath, 2002).”
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“The brain's processing capacity is believed to be dynamic and vary across a person's life span (Plomin & Spinath, 2002; Li et al., 2004).”
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Invisible potentials: A neuroscientific framework for giftedness
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“It has even been argued that general intelligence is one of the most heritable of cognitive traits (Sternberg, & Kaufman, 1998; Plomin, 2001; Plomin & Spinath, 2002; Macintosh, 1998; Jensen, 1998).”
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“While IQ provides perhaps a fair estimate of 'average' cognitive ability, a derived general factor is a more optimal measure of general intelligence (Carroll, 1993; Colom et al., 2006; Johnson et al., 2004; Johnson et al., 2008; Neisser et al., 1996; Plomin & Spinath, 2002).”
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Self-citation
Metadata
- Authors
- Plomin, R., & Spinath, F. M.
- Affiliations
- King's College London (GB)
- Corresponding author
- Plomin, Robert
- Venue
- Trends in Cognitive Sciences
- Publisher
- Elsevier BV
- Published
- 2002-04
- Volume
- 6
- Issue
- 4
- Pages
- 169-176
- ISSN
- 1364-6613 (ISSN-L)
- OpenAlex
- W2150925047
- Cited by
- 191
- References
- 0
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 7 · 2021: 6 · 2020: 4 · 2019: 6 · 2018: 10 · 2017: 6 · 2016: 5 · 2015: 9 · 2014: 6 · 2013: 9 · 2012: 6
- FWCI
- 2.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Trends in Cognitive Sciences (publishedVersion)
- PubMed (publishedVersion)
- Research Portal (King's College London) (submittedVersion)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
- Social Sciences › Psychology › Developmental and Educational Psychology › Education, Achievement, and Giftedness
- Keywords
- general intelligence, heritability of intelligence, genetic variance, cognitive modularity, psychometric tests
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