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

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.

authors

• Allen, Justin
• Hajovsky, Daniel

published proceedings

• Child Psychiatry Hum Dev

altmetric score

• 63.65

author list (cited authors)

• Billeiter, K. B., Froiland, J. M., Allen, J. P., & Hajovsky, D. B.

citation count

• 1

complete list of authors

• Billeiter, Kenzie B||Froiland, John Mark||Allen, Justin P||Hajovsky, Daniel B

publication date

• October 2022

publisher

• Springer Nature  Publisher

published in

• Child Psychiatry and Human Development  Journal

keywords

• Adolescent
• Autism Spectrum Disorder
• Autistic Disorder
• Child
• Children
• Databases, Factual
• Flynn Effect
• Humans
• Intelligence
• Intelligence Tests
• Neurodiversity

PubMed Central ID

• 33939111

Digital Object Identifier (DOI)

• 10.1007/s10578-021-01175-w

start page

• 919

end page

• 927

volume

• 53

issue

• 5

URL

• http://dx.doi.org/10.1007/s10578-021-01175-w