Negatively phrased items of the Autism Spectrum Quotient function differently for groups with and without autism

Autism : the International Journal of Research and Practice
Joost A Agelink van RentergemH M Geurts

Abstract

The Autism Spectrum Quotient is a widely used instrument for the detection of autistic traits. However, the validity of comparisons of Autism Spectrum Quotient scores between groups may be threatened by differential item functioning. Differential item functioning entails a bias in items, where participants with equal values of the latent trait give different answers because of their group membership. In this article, items of the Autism Spectrum Quotient were studied for differential item functioning between different groups within a single sample (N = 408). Three analyses were conducted. First, using a Rasch mixture model, two latent groups were detected that show differential item functioning. Second, using a Rasch regression tree model, four groups were found that show differential item functioning: men without autism, women without autism, people 50 years and younger with autism, and people older than 50 years with autism. Third, using traditional methods, differential item functioning was detected between groups with and without autism. Therefore, group comparisons with the Autism Spectrum Quotient are at risk of being affected by bias. Eight items emerged that consistently show differences in response tendencies between g...Continue Reading

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Citations

Sep 15, 2019·Autism Research : Official Journal of the International Society for Autism Research·Gavin R StewartRebecca A Charlton
Mar 11, 2020·Psychological Medicine·Tim B ZiermansUNKNOWN Genetic Risk and Outcome of Psychosis (GROUP) Investigators
Jan 19, 2020·Journal of Autism and Developmental Disorders·Hilde M GeurtsClaudia J P Simons
Dec 5, 2019·Molecular Autism·Felicity SedgewickKate Tchanturia
Apr 27, 2021·The American Journal of Psychiatry·Lucy RiglinAnita Thapar
May 8, 2021·Clinical Psychology Review·Joost A Agelink van RentergemHilde M Geurts

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psychotree R - package
R
difR
psychomix R - package

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