A psychologist once told me about an autistic teenager labeled “high-functioning” for years based on her advanced vocabulary and academic performance — a label that meant nobody noticed, until a crisis forced the issue, that she was entirely unable to prepare her own meals, manage personal hygiene independently, or navigate public transport without significant support. The label hadn’t just been imprecise. It had actively hidden the exact information that would have gotten her help years earlier.
What the labels were trying to communicate
“High-functioning” and “low-functioning” emerged as informal shorthand attempting to communicate something genuinely useful — roughly how much support a person needs in daily life. The intention behind the terms wasn’t malicious. The problem is that the shorthand collapsed a genuinely multidimensional reality into a single word, and that compression loses exactly the information that actually matters for getting someone appropriate support.
High-functioning often means “needs are invisible,” not “needs are absent”
People labeled high-functioning are frequently judged by visible markers — verbal fluency, academic achievement, employment status — that say nothing reliable about internal experience or support needs in other domains. Someone might speak articulately while experiencing intense, draining sensory overwhelm all day, or hold down a demanding job while being entirely unable to manage their own laundry, cooking, or financial paperwork without help. The label “high-functioning” tends to make these very real needs harder to name and harder to get support for, because the label itself implies they shouldn’t exist.
Low-functioning often underestimates internal experience
On the other side, people labeled low-functioning — often based on limited speech, or significant support needs in one domain — frequently have their internal understanding, awareness, and capability badly underestimated by people around them. Limited speech doesn’t reliably indicate limited comprehension, limited inner language, or limited intelligence, and assuming otherwise has led to real, documented harm: children and adults talked about in front of as though they can’t understand, denied opportunities and respect they were fully capable of using, simply because a blunt label suggested broad incapacity from a single visible trait.
What to say instead
Naming specific support needs directly does more useful work than reaching for either label. “She needs significant support with executive function and transitions, and communicates primarily through an AAC device” tells someone something they can actually act on. “She’s pretty low-functioning” tells them almost nothing reliable, and risks producing exactly the kind of underestimation described above.
For broader descriptions where specificity isn’t practical in the moment, “autistic person with high support needs” or “autistic person with lower support needs” are increasingly preferred over the functioning terminology, because they describe support level directly rather than implying a vague, generalized capability ranking across someone’s entire life.
This shift has come substantially from autistic people themselves
This isn’t a change imposed from outside by people with no stake in the terminology. Autistic adults across the support-needs spectrum have been among the most vocal critics of functioning labels, frequently describing firsthand how the labels misrepresented their own experience in ways that affected real access to support, employment accommodation, and basic respect. The push to retire these terms reflects exactly the kind of self-advocacy-driven language shift that’s reshaped autism discourse more broadly over the last two decades.
Old habits are hard to break, and that’s fine
If you’ve used functioning labels in the past without knowing this background, that’s not a moral failing worth dwelling on — the terms were, and still are, extremely common in casual conversation and even some clinical settings. What matters going forward is simply choosing more specific, more accurate language when you have the opportunity, and not assuming a functioning label tells you anything reliable when you encounter it secondhand, describing someone else.
For the underlying conceptual reason these labels fall short, see our piece on why the word spectrum doesn’t mean what most people think, which covers the multidimensional profile model that’s replaced the single-line thinking these labels grew out of. And for how this exact language shift was driven by organized self-advocacy, our piece on the autistic advocacy movement traces the history.
Laura Mitchell’s recent release Where Autism Meets the World directly addresses functioning labels and their limitations within its opening chapter. Her current book Navigating Life as an Autistic Adult uses support-needs language consistently throughout, in line with this updated approach.
