Impact of IQ discrepancy on executive function in high-functioning autism: insight into twice exceptionality.

Kalbfleisch et al. (2012) looked at high-functioning kids with autism.

They asked: does a big gap between verbal IQ and performance IQ change everyday executive skills?

Parents filled out the BRIEF rating scale about planning, shifting, and self-control.

Kids whose verbal IQ beat their performance IQ had milder executive problems.

The bigger the verbal edge, the lower the parent ratings of trouble.

A verbal lift seems to protect day-to-day self-management.

Mayes et al. (2003) first mapped verbal vs non-verbal splits in autism. They showed the split is common; Layne links the same split to real-life executive skills.

Estes et al. (2011) found IQ-achievement gaps in the same group. Their work warns that strong verbal scores can hide school struggles; Layne adds that the same verbal edge may also hide executive gaps.

McQuaid et al. (2024) later showed WISC index scores overlap in autism. This update tells us to read any IQ gap cautiously, yet Layne’s link to parent-rated executive function still stands.

When you see a verbal IQ above performance IQ, do not assume all is well. Use the BRIEF or classroom checklists to spot subtle planning or shifting issues. Target supports like visual schedules or task breakdowns even when language looks strong.