What is a defining characteristic of autism as a developmental disability?

A defining characteristic of autism as a developmental disability is that it is detectable before age 3. This early detection is crucial as it allows for timely intervention, which can significantly improve outcomes for children with autism. Research has shown that signs of autism can appear as early as infancy, and parents or caregivers may notice atypical behavior patterns, such as difficulties in social interaction or communication, before a child reaches the age of three.

Identifying autism in early childhood is instrumental because it can guide families in seeking appropriate resources and supports, including early intervention programs that are tailored to the child's individual needs. These interventions are designed to enhance communication, social skills, and adaptive functioning, ultimately providing a stronger foundation for the child's development.

In contrast, the other options present constraints or misconceptions about autism that do not align with current understanding and practices regarding the diagnosis and support of individuals on the autism spectrum.