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What Age Does Autism Peak?

Rebecca Hollister

PhD, BCBA-D

Seventeen years in ABA has shaped Rebecca's philosophy: good therapy isn't just about data — it's about dignity.

Autism spectrum disorder (ASD) is a lifelong condition, but its presentation can change over time. While there's no single "peak" age for autism, research indicates that symptom severity often decreases between ages 3 and 6. A study by UC Davis found that nearly 30% of children showed reduced autism symptoms by age 6.


Changes in Autism Symptoms Across Childhood

As children with autism grow, their symptoms can evolve. Some may experience a decrease in severity, while others may see an increase. 


A study from McMaster University highlighted that age 6 is a critical period, with many children showing reduced symptoms, but nearly three-quarters of them experienced a plateau afterward. This underscores the importance of continued support and monitoring as children transition into school years.


It's essential to remember that autism is a spectrum, and each individual's experience is unique. Early intervention and tailored support can significantly impact a child's development and quality of life.



If you're seeking professional support, consider Steady Strides ABA. We offer center-based and home-based ABA therapy in Texas and New Mexico, providing personalized care to help children with autism reach their full potential.


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