“…The questionnaires enquired about behaviors pertaining to hyperactivity, antisocial, and emotional disturbances, but not specifically about attention deficits. They have been used in Asian countries including Japan (Morita, Suzuki, & Kamoshita, 1990), China (Ekblad, 1990;Wang, Shen, Gu, Jia, & Zhang, 1989) and Korea (Matsuura et al, 1993). Factor analysis was carried out in three of the studies.…”