What assessment considerations are important when evaluating ADHD in a child with co-occurring autism spectrum disorder?

• A. Symptom overlap requires careful differential, consider sensory and communication differences, use ASD-specific scales, gather multi-informant data, and assess functional impairment across contexts
• B. ASD and ADHD cannot co-occur
• C. Only rely on one informant
• D. Use ADHD scales alone

Answer: (A)

When evaluating ADHD in a child with autism spectrum disorder, you need a comprehensive, context-rich approach that addresses how the two conditions interact. Symptoms like inattention or hyperactivity can overlap with ASD features, sensory processing differences, or communication challenges, so it’s important to tease apart what each pattern represents. Using ASD-specific assessment tools alongside ADHD measures helps capture the unique ways ASD can influence attention, behavior, and regulation, reducing misattribution of ASD-related behaviors to ADHD or vice versa.

Gathering information from multiple informants across settings is essential because behaviors can look different at home, in school, or in clinical settings. A full picture comes from parents, teachers, or other caregivers who observe the child in different contexts, not just a single viewpoint. Equally important is documenting functional impairment across domains—academic performance, social interactions, and daily living—so you can determine whether ADHD symptoms cause meaningful difficulty beyond those already present with ASD.

Co-occurrence of ADHD and ASD is common, so the goal is to understand how each condition contributes to the child’s functioning and to plan integrated supports. Relying on only one informant or using ADHD scales alone misses the complexity and can lead to an incomplete or inaccurate picture of the child’s needs.