How do you know whether someone really has ADHD and not some other kind of psychological distress or family problems?

Can someone develop ADHD or attention problems because of an inadequate environment, parental negligence, or understimulation during childhood?

Why do doctors give stimulants to hyperactive people?

Are sports beneficial for ADHD?

Can ADHD be confused with the manic phase of bipolar disorder?

Does eating sugar cause hyperactivity?

What is the difference between attention deficit and attention deficit with hyperactivity?

Why study sleep in relation to ADHD?  

How serious is ADHD?

What are the diagnosis criteria of attention deficit?