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Developmental Functioning of Toddlers At-Risk for Autism With and Without Down Syndrome
Celeste Tevis1, Johnny L Matson1, Megan Callahan1
1Louisiana State University, Baton Rouge, LA, USA.
Purpose:
Due to the difficulties in differentiating between impairments associated with intellectual disability and ASD symptomology, DS often leads to delayed or misdiagnoses of ASD.
Method:
An ANOVA was run to investigate the effects of ASD risk and DS on overall developmental functioning across three groups: ASD+, DS-, and DS+ (n = 138). A MANOVA was run to investigate the differences of group on five developmental subdomains.
Results:
The results revealed significant group differences in the overall developmental functioning and each developmental subdomain. Children in the DS+ group demonstrated significantly lower overall developmental functioning, as well as lower adaptive, cognitive, motor, and communication skills compared to their peers; however, children in the DS- group demonstrated significantly better social skills compared to their peers in the ASD+ group.
Discussion:
These findings support the need for early screening and identification of ASD among those with DS.
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