Stability of Autism Spectrum Disorder in Young Children with Diverse Backgrounds.

The team tracked the toddlers who got an autism diagnosis before age three. Families came from many races, incomes, and home languages. Kids took IQ and autism tests again about two years later.

Eight out of ten children still met criteria for ASD at follow-up. Their IQ scores rose an average of ten points. Social and language symptoms also improved, but the label stuck.

Jónsdóttir et al. (2007) saw the same pattern: diagnosis stays while symptoms soften. Warnes et al. (2005) add that early onset style or regression does not predict later scores, so trust the first label.

Fombonne et al. (2022) looked only at Black and White preschoolers and found equal autism signs at referral. Ivy’s wider sample shows the label is just as stable across all groups.

Towle et al. (2018) followed <3-year diagnoses into grade school. Kids who kept the ASD label kept getting stronger services, proving early stability drives future help.

You can tell worried parents that an early ASD call is almost always right. Start intense teaching right away instead of waiting to “make sure.” The a large share who later move off the spectrum still gained skills, so no time is lost.