Assessment & Research

Toward a functional classification for autism in adulthood.

Sterrett et al. (2024) · Autism research : official journal of the International Society for Autism Research 2024
★ The Verdict

A short flowchart lets you sort autistic adults into support-level groups that match real-world functioning.

✓ Read this if BCBAs who write adult autism assessments or service plans.
✗ Skip if Clinicians who only serve autistic children under 12.

01Research in Context

01

What this study did

Sterrett et al. (2024) asked 97 autistic adults to describe their daily support needs.

Clinicians then used a short flowchart to sort each person into a functional subgroup.

The team checked whether different raters placed the same adult in the same group.

02

What they found

The flowchart worked. Clinicians agreed on the groupings.

Each subgroup matched real-life skills like cooking, money care, and social contact.

03

How this fits with other research

Older studies such as Gardner et al. (2009) and Sacco et al. (2012) also split autism into clusters. They used long test batteries and child samples. Kyle’s team shows a quicker, adult-focused way.

Rabba et al. (2025) warn that adult diagnosis is slowed by messy tools. Kyle’s flowchart answers that call by giving clinicians a fast, reliable map.

Billstedt et al. (2011) found most autistic adults need heavy caregiver help yet feel okay about life. Kyle’s groups make it easier to decide who needs what level of support.

04

Why it matters

You can add the flowchart to intake packets. It takes minutes and shows where to focus goals like job coaching or daily living skills. Clear groups also help funders see why each client needs different hours.

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→ Action — try this Monday

Print the flowchart and try it on your next adult intake to pick a support level before you write goals.

02At a glance

Intervention
not applicable
Design
other
Sample size
97
Population
autism spectrum disorder, mixed clinical
Finding
positive

03Original abstract

Autism spectrum disorder (ASD) is a heterogeneous condition that affects development and functioning from infancy through adulthood. Efforts to parse the heterogeneity of the autism spectrum through subgroups such as Asperger's and Profound Autism have been controversial, and have consistently struggled with issues of reliability, validity, and interpretability. Nonetheless, methods for successfully identifying clinically meaningful subgroups within autism are needed to ensure that research, interventions, and services address the range of needs experienced by autistic individuals. The purpose of this study was to generate and test whether a simple set of questions, organized in a flowchart, could be used in clinical practice and research to differentiate meaningful subgroups based on individuals' level of functioning. Once generated, subgroups could also be compared to the recently proposed administrative category of Profound Autism and to groupings based on standardized adaptive measures. Ninety-seven adults with autism or related neurodevelopmental disorders participating in a longstanding longitudinal study, or their caregivers if they could not answer for themselves, completed phone interviews when the participants were ~30 years old. Information from these phone interviews was used to generate vignettes summarizing characteristics and aspects of the daily lives of each participant (e.g., language level, vocational activities, and social relationships). Three expert clinicians then used these vignettes to classify each participant based on their level of support needs. Meaningfully distinct subgroups within the sample were identified which could be reliably distinguished from one another. Implications of such categorizations and future directions are discussed.

Autism research : official journal of the International Society for Autism Research, 2024 · doi:10.1002/aur.3201