One of the most persistent misunderstandings about autism is the assumption that it is inherently tied to intellectual disability. While some autistic people do have co-occurring intellectual disability, folding the two together diagnostically has caused lasting harm…especially for those whose intelligence is underestimated or overlooked.

A major issue lies in how intelligence is measured. Standard IQ tests and cognitive assessments rely heavily on spoken language, timed responses, motor planning, and compliance with social expectations. For non-speaking autistic people, or those with apraxia, sensory processing differences, or alternative communication styles, these tests often measure access rather than ability. When someone cannot easily point, speak, write, or respond quickly, their true cognitive capacity may never be captured.

Mislabeling an autistic person as intellectually disabled when they are actually intellectually capable but communication-limited shapes how they are treated in schools, healthcare, employment, and society at large. Low expectations become self-fulfilling, opportunities are withheld, and competence is doubted, sometimes for a lifetime.

Autism is a neurological condition, rooted in differences in brain wiring/development and connectivity. Yet despite decades of research, we still do not fully understand these neurological differences, and there are no definitive biological tests for autism. What we do know is that cognitive profiles among autistic people are highly diverse.

Importantly, many autistic people have average to above-average IQs, and a significant number demonstrate exceptional abilities in areas such as pattern recognition, memory, logic, creativity, and problem-solving. When we conflate autism with intellectual disability, we erase this reality.

Separating autism from assumptions about intelligence is essential, not just for accuracy, but for dignity, access, and the chance for autistic people to be truly seen.