児童臨床心理が専門の横内氏から、下記の手法を学びました。
親または教師に24の質問にNot True 、Somewhat True、 Cartainly True という答えていただく形で、スコアを計算します。

The strengths and difficulties questionnaire (SDQ) is a short behavioural screening questionnaire for children aged 3 to 16. The questionnaire is used to assess children's mental health, and can be completed by children and young people themselves, by their parents or by their teachers.