I have occasionally wondered if &quot;often misdiagnosed as &quot;your kid is lazy&#x2F;stupid.&quot;&quot; combined with &quot;Confused and ashamed by their struggles, girls will internalize their inability to meet social expectations&quot; results in schoolgirls doing statistically worse than schoolboys in (insert STEM field class that requires deep concentration).  And not just failure when attempted, but also results in signing up for fashion textiles class instead of calculus knowing that calculus is &quot;for boys&quot; when in reality its pragmatically &quot;for people without untreated ADD&quot; which may at this time boil down to &quot;for boys&quot;.<p>If (as a physics style thought experiment) the disease happens at the same rate in two populations, but is only diagnosed and treated in one population, then you&#x27;d naturally expect the untreated population to be, on average, somewhat less successful in attention-mandatory academics; math, sciences, computer programming...  This would seem to be internally consistent, like a conspiracy theory, which is a heck of a long way from being proven in reality of course.