Understanding ADHD vs autism diagnosis

Why the two can look similar

Both ADHD and autism can involve big emotions, difficulty with transitions, sensory sensitivities, and challenges in social situations. A child who is overwhelmed may appear inattentive or impulsive, and a child who struggles with focus may miss social cues.

Common patterns in ADHD

• Difficulty sustaining attention, especially on non-preferred tasks.
• Impulsivity: acting before thinking, interrupting, grabbing, running.
• High activity level or internal restlessness.
• Executive function challenges: planning, organizing, starting tasks, finishing tasks.

Common patterns in autism

• Differences in social communication (back-and-forth, gestures, shared attention).
• Restricted interests, repetitive behaviors, or strong need for sameness.
• Sensory differences that impact daily functioning.
• Social understanding challenges even when attention is good.

Can a child have both ADHD and autism?

Yes. Co-occurrence is common. In practice, this can look like a child who needs predictability and routine but also has difficulty with impulse control or sustained attention. A good evaluation looks at both social-communication patterns and attention/executive functioning.

How supports differ (and overlap)

Many strategies help both: clear routines, visuals, short instructions, and predictable reinforcement. ADHD supports often focus on organization and attention skills; autism supports often focus more on communication and flexibility. ABA can support either diagnosis when goals are individualized and focused on practical daily functioning.