That's a convenient explanation, but it doesn't account for the emotional dysregulation that accompanies ADHD. And it's historically dead wrong: symptom cluster

That's a convenient explanation, but it doesn't account for the emotional dysregulation that accompanies ADHD. And it's historically dead wrong: symptom clusters associated with ADHD were described as early as 1798, and were identified in the 1800s outside the school context. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3000907/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3000907/