Bruijniks, S. J. E.; Frank, U.; Tuschen-Caffier, B.; Werthmann, J.; Renner, F. Skill Improvement Through Learning in Therapy (SKILT): A Study Protocol for a Randomized Trial Testing the Direct Effects of Cognitive Behavioral Therapy Skill Acquisition and Role of Learning Capacity in Depression. CPE 2023, 5, 1-30.