The Distinctive Pattern of Declarative Memories in Autism Spectrum Disorder: Further Evidence of Episodic Memory Constraints.
Autism looks different in boys and girls, so use sex-aware screens and goals.
01Research in Context
What this study did
Cristiane et al. read every paper on sex differences in autism traits. They pulled out the clearest facts about boys versus girls. The team looked at repetitive moves, IQ scores, epilepsy rates, and social signs.
What they found
Boys with autism show more hand-flapping, lining up toys, and strict routines. Girls have higher rates of intellectual disability and epilepsy. Many traits, like social interest, show no clear boy-girl split because studies disagree.
How this fits with other research
Beggiato et al. (2017) warned that the ADI-R interview gives boys extra points for the same behavior, so girls get missed. Cristiane’s review now shows why: boys really do top the charts on RRBIs, but the test still under-scores girls.
Wormald et al. (2019) looked only at high-IQ kids and found no sex gap on the SRS-2. Cristiane says high-IQ is exactly the group where differences shrink, so both papers line up.
Ma et al. (2025) moved the field forward with an MRI brain pattern that tracks social severity across ages. Cristiane’s review sets the stage by mapping which social signs differ by sex, helping future scans interpret results for boys versus girls.
Why it matters
When you screen a girl, expect subtler repetitive play and more language or seizure issues. Plan extra epilepsy checks and don’t wait for classic lining-up toys to flag her. When you write goals, target the girl’s real needs—social communication and daily living—not the boy-biased RRBI checklist.
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02At a glance
03Original abstract
Autism spectrum disorder (ASD) is over four times more prevalent in males compared to females. Increased understanding of sex differences in ASD endophenotypes could add insight into possible etiologies and the assessment and management of the disorder. Consequently, the purpose of this review is to describe current literature regarding sex differences in the developmental, psychiatric, and medical endophenotypes of ASD in order to illustrate current knowledge and areas in need of further research. Our review found that repetitive behaviors and restricted interests are more common in males than females with ASD. Intellectual disability is more common in females than males with ASD. Attention to detail may be more common in males than females with ASD and epilepsy may be more common in females than males with ASD, although limited research in these areas prevent definitive conclusions from being drawn. There does not appear to be a sex difference in other developmental, psychiatric, and medical symptoms associated with ASD, or the research was contradictory or too sparse to establish a sex difference. Our review is unique in that it offers detailed discussion of sex differences in three major endophenotypes of ASD. Further research is needed to better understand why sex differences exist in certain ASD traits and to evaluate whether phenotypic sex differences are related to different pathways of development, assessment, and treatment of the disorder.
Journal of autism and developmental disorders, 2023 · doi:10.1007/s10803-012-1515-y