Ouyang Juei-lin, a doctor at the Taipei Municipal Hospital for Women and Children who specializes in brain functions in children, conducted a questionnaire survey of parents of primary school-aged children in the Kaohsiung area. She found that as many as 30 % of children inclined toward hyperactivity. (See table.)
根據國外的調查，過動兒的盛行率約在百分之五到十之間；台北市立婦幼醫院心智科醫師歐陽瑞琳曾經對高雄地區的小學家長做過問卷調查，結果孩子有過動傾向（見附表）的比例竟高達百分之三十。