IRCT20190417043300N3 IRCT 2019-08-21 Research & technology assistance of Kharazmi University Comparing social response to cognitive behavioral therapy with or without metacognitive techniques Comparing social response to cognitive behavioral therapy with cognitive behavioral therapy with metacognitive techniques in people with chronic insomnia disorder 2018-11-22 anticipated 4 Complete https://irct.ir/trial/41092 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Education/Guidance, Randomization description: Simple randomization is used. In order to randomization, researchers were used sealed pocket. Someone who was not in charge of applying interventions and evaluating of outcomes and was unaware of the study goals, run randomization. N/A Chronic insomnia disorder. Intervention 1: Intervention group: Cognitive behavioral therapy: Eight weekly sessions; include stimulus control therapy, sleep restriction therapy, sleep hygiene education, and cognitive therapy. Duration of each session: 30 to 90 minutes. Intervention 2: Intervention group: Cognitive behavioral therapy with metacognitive techniques: Eight weekly sessions; include stimulus control therapy, sleep restriction therapy, sleep hygiene education, and cognitive therapy. Duration of each session: 30 to 90 minutes with detached mindfulness and worry and rumination postponement from session 5 to 8. No - There is not a plan to make this available Justification or reason for not sharing IPD is Privacy in personal information