Final answer:
An Autism Spectrum Disorder diagnosis at age 2 can be reliable and stable, enabling early intervention, although symptoms and trajectories vary among individuals.
Step-by-step explanation:
The question of whether a diagnosis of Autism Spectrum Disorder (ASD) at age 2 can be reliable and stable is complex. Studies have shown that with careful evaluation, a diagnosis of ASD at this age can, in many cases, be accurate and indicative of the child's developmental trajectory.
Early diagnosis is crucial as it allows for early intervention, which is known to improve outcomes for children with ASD. However, the symptoms of ASD can vary widely among individuals, and in some cases, a child's developmental path can change, making the stability of an early diagnosis less certain.