Autism Subtypes

• Subtype 1: Social and Behavioral Challenges (Flatiron Institute, 2020s) – prominent social-communication and repetitive-behavior traits; developmental milestones often on time; higher rates of co-occurring psychiatric features (e.g., ADHD/ anxiety)
• Subtype 2: Mixed ASD with Developmental Delay (Flatiron Institute, 2020s) – later early milestones (language/ motor), with fewer psychiatric comorbidities on average; mixed presentation of core autism
• Subtype 3: Moderate Challenges (Flatiron Institute, 2020s) – generally milder core autism traits; milestones often on time; fewer co-occurring psychiatric conditions relative to Subtype 1
• Subtype 4: Broadly Affected (Flatiron Institute, 2020s) – most globally impacted profile: broader developmental, social/communication, and often psychiatric/medical challenges

Please cite this article as:
Davis, B., & Francis, K. (2026). “Autism Subtypes” in Discourses on Learning in Education. https://learningdiscourses.com.