Adaptive behaviors in high-functioning Taiwanese children with autism spectrum disorders: an investigation of the mediating roles of symptom severity and cognitive ability.

Chang et al. (2013) looked at high-functioning Taiwanese children with autism. They asked: do daily living skills match their IQ scores?

The team gave IQ tests and the Vineland Adaptive Behavior Scales to a local sample. They checked which domain—communication, daily living, or social—was weakest.

Adaptive skills lagged behind IQ in every child. Social skills were the lowest area, even when kids had average or high IQ scores.

The gap was large enough that IQ alone could not predict how well a child could dress, chat, or cook.

Richman et al. (2001) saw the same IQ-adaptive gap first in U.S. kids. Chen-Lin repeats the picture in Asia, so the mismatch is global.

Tillmann et al. (2019) add that only social-communication symptoms, not sensory or repetitive ones, drive the deficit. This backs Chen-Lin’s finding that social skills suffer most.

Austin et al. (2015) tracked the same kids over time and show the gap widens as they age. Chen-Lin’s snapshot now looks like the middle of a downhill slide.

Wang et al. (2024) move the gap even younger—Chinese preschoolers already show it. Together, the studies draw one line: the IQ-adaptive split starts early and grows.

If you serve verbal or high-IQ learners, never trust IQ to tell you their self-care or social needs. Screen all domains with Vineland or ABAS and write goals for dressing, meal prep, and peer conversation right away. Starting early may slow the widening gap shown in later studies.