Comparison of the Factor Structure of the Child Behavior Checklist 1.5–5 between Children with ASD and Children with DD

•We tested measurement invariance to compare children with ASD and children with DD on each subscale of the CBCL 1.5-5.•All of the subscales achieved basic level of invariance, suggesting similar factor structures across these two groups.•Withdrawn, Aggressive behavior, and Sleep Problems did not achieve metric invariance, suggesting the relations between items and latent constructs are not similar across groups.•Six out of seven subscales did not achieve scalar invariance, suggesting further group comparisons will not be ideal.