PARENTS: Parents are often the first to notice extreme (with an emphasis on extreme) behavior: trouble following simple instructions and controlling temper; hyperactivity. Parents may compare observations with the child’s teacher.

TEACHER: If the teacher thinks the student has unusual trouble sitting still or concentrating, a school psychologist may be called in (if one is available) to examine, test the child and gather behavioral history from the parents.

PEDIATRICIAN: The doctor looks for physical conditions that can explain the child’s problem: vision or hearing difficulties, allergies, etc. Should consult with other specialists, but too often writes a prescription instead.

PSYCHIATRIST, NEUROLOGIST: This specialist looks for emotional disorders and evaluates the family situation. Takes testimony from other adults: teachers, scout leaders, etc. Does the child have ADHD or severe anxiety or depression?

DEVELOPMENTAL SPECIALIST: A speech pathologist or occupational therapist testS for even more subtle problems. Searches for learning disabilities and perception problems that can be marked by inattention.

For ADHD, treatment can include a program of behavior modification, imposing more structure and removing distractions; medication, usually Ritalin, to help the child focus. Doctors will monitor the child’s progress.