It has been reported that some patients have been misdiagnosed with Autism, when in fact the correct diagnosis in their specific case was Attention Deficit Hyperactivity Disorder (ADHD).
ADHD is not diagnosed by a test but mainly by checking if the child satisfies the criteria that is required for diagnosis. Several questions regarding hyperactivity, attention span, social interaction, impulsive reaction and other things are answered by the parents and a score is given based on these answers. The score determines ADHD diagnosis and its severity. Behaviour therapy and medications can help in controlling the symptoms and help the child lead a normal life.