Efficacy of a Self-Guided Internet Intervention With Optional On-Demand Feedback Versus Digital Psychoeducation on Sleep Hygiene for University Students With Insomnia: Randomized Controlled Trial

Anna-Carlotta Zarski   ^{1, 2} , PhD ;   Karina Bernstein   ² , PhD ;   Harald Baumeister   ³ , PhD ;   Dirk Lehr   ⁴ , PhD ;   Stella Wernicke   ² ;   Ann-Marie Küchler   ³ , PhD ;   Fanny Kählke   ^{2, 5} , PhD ;   Kai Spiegelhalder   ⁶ , PhD ;   David Daniel Ebert   ² , PhD

¹ Division of eHealth in Clinical Psychology, Department of Clinical Psychology, Philipps University of Marburg, Marburg, Germany

² Psychology and Digital Mental Health Care, TUM School of Medicine and Health, Technical University Munich, Munich, Germany

³ Department of Clinical Psychology and Psychotherapy, Institute of Psychology and Education, Ulm University, Ulm, Germany

⁴ Department of Health Psychology and Applied Biological Psychology, Leuphana University Lüneburg, Lüneburg, Germany

⁵ Faculty of Applied Healthcare Sciences, Deggendorf Institute of Technology, Deggendorf, Germany

⁶ Department of Psychiatry and Psychotherapy, Medical Center -- University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany