Objective: To examine the contributions of race and diagnostic category to endorsement rates of challenging behaviours in infants and toddlers with autism, PDD-NOS and atypical development without ASD, using the Baby and Infant Screen for Children with aUtIsm Traits, Part-3 (BISCUIT Part-3).
Design: Multivariate analyses of variance (MANOVAs) on each sub-scale of the BISCUIT Part-3. Follow-up univariate analyses and post-hoc tests as needed.
Methods: Scores on the BISCUIT Part-3 were compared for 453 Caucasian and 409 African-American infants and toddlers, grouped by race and diagnosis.
Results: Significant differences between races were found on five out of 10 aggressive behaviours, while no significant differences were found on self-injurious or stereotypic behaviours. Significant differences between diagnostic groups were found on all behaviours.
Conclusion: Cultural factors should be taken into account when examining challenging behaviours in infants and toddlers with ASD.
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