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Development of the Attention-Deficit Hyperactivity Disorder-After School Checklist
J Korean Acad Child Adolesc Psychiatry 2018;29(2):47-53
Published online April 1, 2018
© 2018 Korean Academy of Child and Adolescent Psychiatry.

Hanik K. Yoo1, Hannah Huh1, Sukhyun Lee2, Kwangmo Jung3, and Bongseog Kim2

1Seoul Brain Research Institute, Seoul, Korea
2Division of Child & Adolescent Psychiatry, Department of Psychiatry, Sanggye Paik Hospital, School of Medicine, Inje University, Seoul, Korea
3Seoultop Psychiatric Clinic, Seoul, Korea
Correspondence to: Bongseog Kim, Division of Child & Adolescent Psychiatry, Department of Psychiatry, Sanggye Paik Hospital, School of Medicine, Inje University, 1342 Dongil-ro, Nowon-gu, Seoul 01757, Korea
Tel: +82-2-950-1082, Fax: +82-2-950-8883, E-mail:
Received October 16, 2017; Revised December 2, 2017; Accepted January 2, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Objectives: This study aimed to develop the attention-deficit hyperactivity disorder (ADHD)-After School Checklist (ASK) to evaluate the severity of ADHD symptoms and self-management ability in children and adolescents in South Korea. Additionally, we evaluated the reliability and validity of the scale.
Methods: We developed the ASK to evaluate the effect of ADHD psychopathologies on self-management and interpersonal impulsivity. We investigated the reliability and validity of the scale with 1349 parents (male 56.9%; 1202 parents of non-ADHD children, 147 parents of children with ADHD) in Seoul and Gyeonggi Province, Korea.
Results: According to the construct validity test using principal constant analysis with the varimax rotation method, two factors explained 60.7% of the cumulative variance in ASK scores. Cronbach’s alpha for the whole scale was 0.71. There was no statistical difference between mean ASK scores at test and retest. Mean total ASK scores of the ADHD group were significantly higher than those of the non-ADHD group (p<0.001).
Conclusion: The ASK can be used as a reliable and valid tool to evaluate not only self-management capability of children and adolescents with ADHD in their academic and everyday life, but also their impulsiveness in interpersonal relationships.
Keywords : Attention-deficit hyperactivity disorder; Self management; Screening; After School Checklist.

April 2018, 29 (2)
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