The Strengths and Weaknesses of Attention-Deficit/Hyperactivity Disorder Symptoms and Normal Behavior Scale (SWAN) is an 18-question parent or teacher rating scale to assess for the indication of attention-deficit hyperactivity disorder in children. "Weaknesses" are scored as positive and the "strengths" are scored as negative because the usual ratings (i.e., in the Swanson, Nolan and Pelham (SNAP)) are ratings of "symptom severity". This keeps the average rating-per-item of the SWAN aligned with the average rating-per-item of the SNAP if the negative item ratings of the SWAN are set to 0 before averaging the items.
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