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Cited by 156Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersCognitive Abilities and Testing

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Autism As a Disorder of High Intelligence

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Crespi, Bernard J.·2016·Frontiers in Neuroscience
DOI 10.3389/fnins.2016.00300PMC PMC4927579
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Abstract

A suite of recent studies has reported positive genetic correlations between autism risk and measures of mental ability. These findings indicate that alleles for autism overlap broadly with alleles for high intelligence, which appears paradoxical given that autism is characterized, overall, by below-average IQ. This paradox can be resolved under the hypothesis that autism etiology commonly involves enhanced, but imbalanced, components of intelligence. This hypothesis is supported by convergent evidence showing that autism and high IQ share a diverse set of convergent correlates, including large brain size, fast brain growth, increased sensory and visual-spatial abilities, enhanced synaptic functions, increased attentional focus, high socioeconomic status, more deliberative decision-making, profession and occupational interests in engineering and physical sciences, and high levels of positive assortative mating. These findings help to provide an evolutionary basis to understanding autism risk as underlain in part by dysregulation of intelligence, a core human-specific adaptation. In turn, integration of studies on intelligence with studies of autism should provide novel insights into the neurological and genetic causes of high mental abilities, with important implications for cognitive enhancement, artificial intelligence, the relationship of autism with schizophrenia, and the treatment of both autism and intellectual disability.

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Figure 1 The VPR model of intelligence. Under this model, the higher-level architecture of human intelligence, as indicated by diverse mental-ability tasks, involves one general factor, g, and three mid-level factors, Verbal, Perceptual, and image Rotation, that reflect variation among individuals in large-scale neural structure and processing. Adapted from Johnson et al. (2007).
Figure 1 The VPR model of intelligence. Under this model, the higher-level architecture of human intelligence, as indicated by diverse mental-ability tasks, involves one general factor, g, and three mid-level factors, Verbal, Perceptual, and image Rotation, that reflect variation among individuals in large-scale neural structure and processing. Adapted from Johnson et al. (2007).CC BY · PubMed Central
Figure 2 Two orthogonal dimensions of intelligence, which emerge after the general factor g is statistically removed. Poles of each of the two dimensions demonstrate inverse associations with one another, indicative of neurally-based cognitive trade-offs. The psychotic-affective spectrum includes mainly schizophrenia, bipolar disorder, depression, and borderline personality disorder. Adapted from Johnson et al. (2007).
Figure 2 Two orthogonal dimensions of intelligence, which emerge after the general factor g is statistically removed. Poles of each of the two dimensions demonstrate inverse associations with one another, indicative of neurally-based cognitive trade-offs. The psychotic-affective spectrum includes mainly schizophrenia, bipolar disorder, depression, and borderline personality disorder. Adapted from Johnson et al. (2007).CC BY · PubMed Central
Figure 3 Brain regions, and temporal stages, representing the P-FIT (Parietal Frontal Integration Theory) model of intelligence. Postulated alterations in autism, compared to control individuals, are shown along the periphery, and described in the text. Adapted from Colom et al. (2010).
Figure 3 Brain regions, and temporal stages, representing the P-FIT (Parietal Frontal Integration Theory) model of intelligence. Postulated alterations in autism, compared to control individuals, are shown along the periphery, and described in the text. Adapted from Colom et al. (2010).CC BY · PubMed Central
Figure 4 Autism and intelligence are genetically correlated with one another, indicative of a shared genetic basis, and they share phenotypic correlations or associations with a broad suite of traits. These patterns suggest that autism risk is mediated in part by high, but imbalanced, components of intelligence.
Figure 4 Autism and intelligence are genetically correlated with one another, indicative of a shared genetic basis, and they share phenotypic correlations or associations with a broad suite of traits. These patterns suggest that autism risk is mediated in part by high, but imbalanced, components of intelligence.CC BY · PubMed Central

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Research works printed but not linked: 2

  1. Crespi, 2016, The evolutionary biology of human neurodevelopment: evo-neuro-devo comes of age, 205
  2. Hauser, 2002, Meritocracy, Cognitive Ability, and the Sources of Occupational Success

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Metadata

Authors
Crespi, B. J.
Affiliations
Simon Fraser University (CA)
Corresponding author
Crespi, Bernard J.
ORCID
Crespi, Bernard J.
Venue
Frontiers in Neuroscience
Publisher
Frontiers Media SA
Published
2016-06-30
Volume
10
Pages
300-300
ISSN
1662-453X (ISSN-L)
DOI
10.3389/fnins.2016.00300
PMC
PMC4927579
OpenAlex
W2470385410
Cited by
156
References
235
Citations by year
2026: 8 · 2025: 12 · 2024: 18 · 2023: 24 · 2022: 24 · 2021: 22 · 2020: 19 · 2019: 13 · 2018: 10 · 2017: 4 · 2016: 1
FWCI
5.94
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
Natural Sciences and Engineering Research Council of Canada (311201)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
Keywords
autism spectrum disorder, high IQ, genetic correlation, IQ, brain size, brain growth, visuospatial ability, sensory abilities, synaptic function, attention, socioeconomic status, decision-making, career interest, assortative mating, autism etiology, schizophrenia, intellectual disability, cognitive enhancement

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