Hyperactivity and attention problems in a Swiss sample of school-aged children: effects of school achievement, child gender, and informants.

Objective: The sensitivity and tolerance regarding ADHD symptoms obviously differ from one culture to another and according to the informants (parents, teachers, or children). This stimulates the comparison of data across informants and countries.

Method: Parents and teachers of more than 1,000 school-aged Swiss children (5 to 17 years old) fill in Conners's questionnaires on ADHD.