Effectiveness of Unguided Internet-Based Cognitive Behavioral Therapy for Subthreshold Social Anxiety Disorder in Adolescents and Young Adults: Multicenter Randomized Controlled Trial

Kazuki Matsumoto   ¹ , PhD ;   Sayo Hamatani   ^{2, 3} , PhD ;   Kiko Shiga   ⁴ , PhD ;   Kiyoko Iiboshi   ⁴ , PhD ;   Makiko Kasai   ⁵ , PhD ;   Yasuhiro Kimura   ⁶ , MA ;   Satoshi Yokota   ⁷ , MA ;   Katsunori Watanabe   ⁸ , PhD ;   Yoko Kubo   ⁹ , MA ;   Masayuki Nakamura   ¹⁰ , MD, PhD

¹ Division of Clinical Psychology, Kagoshima University Hospital, Research and Education Assembly Medical and Dental Sciences Area, Kagoshima University, Kagoshima, Japan

² Research Center for Child Mental Development, University of Fukui, Fukui, Japan

³ Department of Child and Adolescent Psychological Medicine, University of Fukui Hospital, Fukui, Japan

⁴ Department of Clinical Psychology, Faculty of Human Relations, Shigakukan University, Kagoshima, Japan

⁵ Clinical Psychology Course, Naruto University of Education, Tokushima, Japan

⁶ Department of Welfare Psychology, Faculty of Welfare, Fukushima College, Fukushima, Japan

⁷ Kochi Kokusai High School, Kochi, Japan

⁸ Department of Psychology, Jin-ai University, Fukui, Japan

⁹ Graduate School of Clinical Psychology, Kagoshima University, Kagoshima, Japan

¹⁰ Department of Psychiatry, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan