Comparison of the Sensory Profile Among Autistic Individuals and Individuals with Williams Syndrome.

Masahiro and colleagues compared sensory profiles of autistic individuals and individuals with Williams syndrome. They used caregiver questionnaires to map how each group reacts to sounds, textures, movement, and visual input. The study tracked age-related changes to see if sensory patterns shift as children grow.

Only one clear difference emerged: autistic participants scored higher on Sensory Sensitivity than those with Williams syndrome. Both groups showed sensory seeking and avoiding behaviors, but these changed with age in opposite directions. The findings were mixed overall, suggesting more overlap than contrast between the two syndromes.

The result sharpens earlier work. Schneider et al. (2006) first showed broad sensory issues across modalities in autism; Masahiro narrows the signal to sensitivity alone when autism is compared with Williams syndrome.

Capio et al. (2013) linked sensory problems to repetitive behaviors inside Williams syndrome. The new study keeps that syndrome’s sensory profile steady, showing it is autism’s extra sensitivity that stands out.

MacFarland et al. (2025) recently argued sensory sensitivity is a core autism trait even after removing ADHD effects. Masahiro’s cross-syndrome comparison supports that claim by showing sensitivity, not other sensory quadrants, uniquely flags autism.

If you assess a child with developmental delays, a spike in Sensory Sensitivity scores can nudge you toward an autism evaluation rather than Williams syndrome. Track this quadrant over time; the new data show it stays high in autism while seeking and avoiding behaviors can wax or wane differently in each condition. Use this single clear difference to explain referral choices to families and to prioritize sensitivity-focused interventions such as gradual exposure or noise-reducing headphones.