Insomnia catastrophizing has attracted attention in recent years. Individuals may have started to recognize the importance of evaluating the consequences of insomnia, which has worsened during the coronavirus disease 2019 (COVID-19) pandemic. The present study aimed to test the validity and reliability of the Insomnia Catastrophizing Scale (ICS) in the Turkish young adult population. The study group consisted of a total of 387 participants: 57 in the pilot study and 330 in the main study. The majority of the participants in the study were females. According to the results of the confirmatory factor analysis, the single-factor structures of the ICS nighttime and daytime forms were confirmed to be the same as in the original structure, and the fit indices were above the acceptable limits. The ICS forms had very high reliability. The findings of the present study showed that the Turkish daytime and nighttime forms of the ICS are valid and reliable instruments. The results provide a means of measuring insomnia catastrophizing for use in therapeutic and counseling settings for Turkish young adult population. We also propose that mental health practitioners should design interventions to reduce insomnia catastrophizing in Turkish culture.

失眠的灾难性近年来引起了人们的关注。个人可能已经开始认识到评估失眠后果的重要性，失眠在 2019 年冠状病毒病 (COVID-19) 大流行期间恶化。本研究旨在测试土耳其年轻人群中失眠灾难化量表（ICS）的有效性和可靠性。该研究组共有 387 名参与者：57 名在试点研究中，330 名在主要研究中。该研究的大多数参与者是女性。根据验证性因子分析的结果，确认ICS夜间和白天形式的单因素结构与原始结构相同，拟合指数在可接受的范围内。ICS 表格具有非常高的可靠性。本研究的结果表明，ICS 的土耳其日间和夜间形式是有效且可靠的工具。结果提供了一种测量失眠灾难的方法，用于土耳其年轻人的治疗和咨询环境。我们还建议心理健康从业者应设计干预措施，以减少土耳其文化中的失眠灾难。