The condition has nothing to do with discipline and has likely existed through out mans history but was not a problem as sensory stimulation was not as it is today. The problem is the sensory triggering events {bombardment} were not prevalent up until the past two decades. I would take any child who exhibits ADD ADHD or learning problems for testing. BTW my sources on this do not come from mental health related sites but rather sites related to Vestibular Disorders. IOW no skewing from Big Pharm. Audiologist and Speech Pathologist can not prescribe any medications :>}
Are there people out there that suffer from ADD/ADHD? Probably. But is it as wide spread a problem? Probably not. As someone stated above, the questions for these indicators could apply to just about any kid.