When Labels Fall Short: Rethinking Autism Assessment

By Elaina Falcone Antonello Clinical, Education Autism, Clinical Assessment, Clinical Psychology, Education Assessment, School Psychologist

At a glance:

Autism Spectrum Disorder (ASD) is not a single continuum of ability; it is a profile of uneven strengths and challenges that cannot be meaningfully reduced to a global label.
When labels stand in for assessment, critical needs may be overlooked, strengths minimized, and decisions misinformed.
The language used in assessment is not neutral—it can shape expectations, reinforce stigma, and influence access to meaningful supports.

A clinician describes a student as “high functioning.” Another describes the same student as “struggling significantly.” Both may be accurate, and both may be incomplete. Terms like “high functioning” and “low functioning” have been widely used to describe individuals on the autism spectrum. These labels are increasingly seen by clinicians, researchers, and autistic individuals alike as imprecise and, in some cases, harmful. In both clinical practice and eligibility assessment, there is increasing recognition that these labels obscure more than they clarify.

As our understanding of autism has evolved, so has the language we use to describe it. Today, the field is moving toward more precise, individualized, and support-based frameworks. This shift has important implications for assessment, intervention, and how we communicate about autism in both clinical and educational settings.

Where Did Functioning Labels Come From?

Functioning labels such as “high functioning” and “low functioning” autism emerged not from formal diagnostic criteria, but from early efforts to distinguish between individuals based on language ability and intellectual functioning. Following the parallel descriptions of autism by Kanner (1943) and Asperger (1944), later diagnostic systems, particularly the DSM-IV, formalized subtypes such as Asperger’s syndrome and autistic disorder.¹

In practice, these categories became shorthand for differences in perceived functioning, with Asperger’s syndrome often equated to “high functioning” autism and other presentations to “low functioning” autism.² Importantly, these labels were never standardized or empirically defined, contributing to ongoing concerns about their clinical utility and accuracy.

Why Functioning Labels Fall Short

Both research and clinical practice point to a central challenge: functioning labels do not align with how autism actually presents, is experienced, or should be assessed. The limitations are not only conceptual, but they also have direct implications for diagnosis, support planning, outcomes, and the ways individuals may be perceived or stigmatized.

Labels oversimplify and rely on incomplete and inconsistent proxies

Autism is widely recognized as a highly varied neurodevelopmental condition, with significant variability across cognitive ability, language development, adaptive functioning, symptom presentation, and co-occurring conditions.³ Functioning labels attempt to collapse this variability into a single continuum (i.e., “high” vs. “low”), which does not reflect the reality that individuals often present with uneven and unique profiles across domains. For example, an individual may demonstrate strong verbal reasoning but experience significant challenges in social reciprocity or sensory regulation—differences that cannot be meaningfully captured by a single global label.

Historically, functioning labels have often been based on proxies such as IQ scores or language ability. However, these indicators provide only a partial view of an individual’s functioning. Research has consistently shown that intellectual ability does not reliably predict adaptive functioning, daily living skills, or social participation.⁴ As a result, individuals with similar IQ profiles may have markedly different real-world support needs, further limiting the interpretive value of these labels. For example, a student described as “high functioning” may perform well academically, yet require significant support with social communication, emotional regulation, or transitions—key skills for success in academic settings but needs that may be overlooked when a global label is used.

Labels obscure, rather than clarify and support needs

One of the most significant clinical limitations of functioning labels is that they often fail to communicate what matters most: the type and level of support an individual requires.

Individuals labeled “high functioning” may have their challenges underestimated or overlooked
Individuals labeled “low functioning” may have their strengths minimized or ignored

This mismatch can influence access to services, intervention planning, and expectations in both educational and clinical contexts, as well as contribute to stigma, ultimately impacting outcomes.

From an assessment perspective, functioning labels are not operationalized constructs. They lack standardized definitions and are applied inconsistently across practitioners and settings.

This imprecision limits their usefulness in informing:

Diagnosis or identification
Treatment planning
Progress monitoring

In contrast, modern assessment approaches prioritize domain-specific, profile-based data that can guide targeted, individualized interventions.

Labels can shape expectations in ways that do not reflect the individual

Although often intended as descriptive, functioning labels can subtly influence how individuals are perceived and supported. In some cases, a “lower functioning” label may lead caregivers or systems to over-accommodate, reinforcing patterns of dependence or allowing idiosyncratic behaviors to persist without fostering skill development or autonomy. Conversely, “higher functioning” labels can mask underlying challenges, particularly when individuals engage in significant effort to compensate or mask difficulties. This can result in missed support needs, as the visible presentation may not reflect the internal effort, stress, or fatigue required to sustain it.

Taken together, these limitations have contributed to a broader shift in the field toward frameworks that emphasize individualized profiles and support needs, as reflected in the DSM-5 and contemporary assessment practices.

This shift is perhaps most clearly reflected in the DSM-5, published in 2013, which marked a major change in how autism is conceptualized and diagnosed. In this edition, categorical subtypes (e.g., Asperger’s, autistic disorder) were replaced with a single diagnosis: Autism Spectrum Disorder (ASD).

Instead of functioning labels, the DSM-5 introduced severity levels based on support needs, defined separately across:

Social communication
Restricted and repetitive behaviors

This framework emphasizes that autism is not a fixed level of functioning, but rather a dynamic interaction between individual characteristics and environmental demands. This distinction is critical: the goal is no longer to classify individuals, and instead to clarify the supports required for participation across contexts.

A Shift in How Autism is Understood and Assessed

The limitations of functioning labels have prompted more than incremental refinement; they have driven a fundamental shift in how ASD is conceptualized. Rather than attempting to improve broad categorizations such as “high” or “low” functioning, the field has moved toward frameworks that prioritize individualized profiles, context, and support needs.

This evolution aligns with contemporary models of functioning, including the World Health Organization’s International Classification of Functioning, Disability and Health (ICF), which conceptualizes functioning as the interaction between:

Individual characteristics (e.g., cognitive, sensory, behavioral)
Activities and participation
Environmental factors⁵

From this perspective, functioning is not an inherent trait of the individual, but an outcome shaped by context. The same individual may demonstrate different levels of functioning depending on environmental demands, supports, and expectations. These insights underscore that functioning is not fixed, but fluid, shifting across contexts and over time as support needs change. Therefore, any single global label is insufficient to capture the complexity of an individual’s experience.

For clinicians and school psychologists, this shift requires a corresponding evolution in assessment practices. Rather than relying on summary judgments of functioning, best practice now emphasizes multi-dimensional, multi-informant, profile-based assessment approaches that:

Evaluate strengths and challenges across domains (e.g., social communication, regulation, sensory processing)
Consider co-occurring or overlapping conditions
Capture variability across contexts (e.g., home, school, community)
Inform targeted, individualized intervention planning

As the field shifts away from labels, assessment must evolve accordingly, moving from summarizing functioning to capturing meaningful, actionable profiles.

For example, the Autism Spectrum Rating Scales™ (ASRS^®) for youth and the Autism Spectrum Rating Scales™ Adult (ASRS^® Adult) are built to capture how autism-related characteristics present across domains, contexts, and perspectives, rather than distilling functioning into a single label. By incorporating input from key informants (i.e., parents/caregivers and teachers of youth, as well as observers and self-report in adults), these tools provide a comprehensive view of an individual’s experiences across settings.

Importantly, ASRS and ASRS Adult results move beyond global categorization by offering domain-specific profiles of strengths and challenges, helping clinicians and educators identify patterns that may not be apparent through observation alone. This profile of results includes areas such as social communication, behavioral regulation, sensory sensitivity, and related functional impacts, domains that are critical for both diagnosis and intervention planning.

In doing so, these measures support psychologists in answering more meaningful, actionable questions such as:

Where does this individual experience the greatest challenges?
In which contexts do these challenges emerge?
What specific supports are most likely to be effective?

In practice, this focus shifts the role of assessment from assigning a functional level to mapping a profile that can guide action. The result is a shift from labeling to understanding, enabling more precise, individualized, and contextually informed decision-making than was previously available. This modern assessment framework aligns with an emerging emphasis on support needs as a core construct in autism assessment and service planning, consistent with contemporary frameworks that conceptualize functioning as context-dependent and multidimensional.⁵

Toward More Meaningful Language in Autism Assessment

Language in assessment is never neutral—it reflects how we understand individuals, and in turn, can influence how they are supported. Terms like “high functioning” and “low functioning” may have once offered a convenient shorthand, but they no longer reflect the complexity of the experience of an individual with Autism or the realities of clinical practice.

Moving forward requires a shift toward language that is more precise, more individualized, and more aligned with support needs. By focusing on profiles rather than labels, psychologists can better capture the full range of strengths and challenges and, ultimately, provide more meaningful, actionable support for the individuals they serve.

Ready to take a more nuanced, profile-based approach to autism assessment?
Learn how the Autism Spectrum Rating Scales™ (ASRS^®) for youth and the ASRS^® Adult can support more precise identification, individualized intervention planning, and ongoing progress monitoring.

Not sure where to start? Talk to our team for personalized recommendations based on your population, setting, and goals.

References

¹ Barahona-Corrêa, J. B., & Filipe, C. N. (2016). A concise history of Asperger syndrome: The short reign of a troublesome diagnosis. Frontiers in Psychology, 6, Article 2024. https://doi.org/10.3389/fpsyg.2015.02024

² de Giambattista, C., et al. (2019). Subtyping the autism spectrum disorder: Comparison of children with high-functioning autism and Asperger syndrome. Journal of Autism and Developmental Disorders.

³ Wolff, N., Stroth, S., Kamp-Becker, I., Roepke, S., & Roessner, V. (2022). Autism spectrum disorder and IQ – A complex interplay. Frontiers in Psychiatry, 13, 856084. https://doi.org/10.3389/fpsyt.2022.856084

⁴ Wolff, N., Stroth, S., Kamp-Becker, I., Roepke, S., & Roessner, V. (2022). Autism spectrum disorder and IQ – A complex interplay. Frontiers in Psychiatry, 13, 856084. https://doi.org/10.3389/fpsyt.2022.856084

⁵ Centers for Disease Control and Prevention. (2024). International Classification of Functioning, Disability and Health (ICF). https://www.cdc.gov/nchs/icd/icf/index.html