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03-05-2021 | Original Article

Neurodiversity and Intelligence: Evaluating the Flynn Effect in Children with Autism Spectrum Disorder

Tijdschrift:: Child Psychiatry & Human Development

Auteurs:: Kenzie B. Billeiter, John Mark Froiland, Justin P. Allen, Daniel B. Hajovsky

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Abstract

The Flynn Effect (FE) among child and adolescent populations indicates that intelligence scores improve by about three points per decade. Using nine years of data from the National Database for Autism Research, this study examined whether general intelligence changed significantly for nine cohorts with autism spectrum disorder (ASD; N = 671). Analyses demonstrated a downward trend such that Cohen’s d from 1998 to 2006 was − 0.27. The mean IQ is 92.74 for years 1–3, 91.54 for years 4–6, and 87.34 for years 7–9, indicating a reverse FE of 5.4 points per decade. A linear regression revealed a significant negative FE comparable to the positive effect of age on IQ among those with ASD. Implications for research, practice, and law are discussed.

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Titel: Neurodiversity and Intelligence: Evaluating the Flynn Effect in Children with Autism Spectrum Disorder
Auteurs:: Kenzie B. Billeiter
John Mark Froiland
Justin P. Allen
Daniel B. Hajovsky
Publicatiedatum: 03-05-2021
DOI: https://doi.org/10.1007/s10578-021-01175-w
Uitgeverij: Springer US
Tijdschrift: Child Psychiatry & Human Development
Print ISSN: 0009-398X
Elektronisch ISSN: 1573-3327

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