Large Language Model–Based Behavioral Activation Chatbot for Young People With Depression Using Artificial Users and Clinical Experts: Mixed Methods Evaluation

Florian Onur Kuhlmeier   ¹ , PhD ;   Leon Hanschmann   ¹ , MSc ;   Melina Rabe   ² , MSc ;   Stefan Lüttke   ³ , Dipl-Psych ;   Eva-Lotta Brakemeier   ² , Prof Dr ;   Alexander Maedche   ¹ , Prof Dr

¹ Institute for Information Systems (WIN), Karlsruhe Institute of Technology, Karlsruhe, Baden-Wurttemberg, Germany

² Department of Clinical Psychology and Psychotherapy, Universität Greifswald, Greifswald, Mecklenburg-Vorpommern, Germany

³ Chair of Clinical Child and Adolescent Psychology and Psychotherapy, Department of Psychology, Saarland University, Saarbrücken, Germany