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The present pilot study investigated the effectiveness and acceptance of an internet\u2010based intervention to improve sleep difficulties in international students. A total of 81 international students of 36 nationalities were randomly assigned to the intervention (<jats:italic>n<\/jats:italic>\u00a0=\u00a041) or waitlist control group (<jats:italic>n<\/jats:italic>\u00a0=\u00a040). The intervention group received immediate access to a culturally non\u2010adapted unguided internet\u2010based sleep intervention consisting of three modules based on sleep hygiene and cognitive techniques to reduce rumination. At baseline, 4 and 12\u00a0weeks after randomisation, insomnia severity, measured by the Insomnia Severity Index, and secondary outcomes (sleep quality, depression, anxiety, perceived stress, well\u2010being, presenteeism, mental health literacy) were assessed. Data were analysed using linear multi\u2010level analyses. Additionally, satisfaction and perceived cultural appropriateness of the intervention were evaluated by international students after 4\u00a0weeks, and compared with ratings of German students, who represent the original target group. Insomnia severity improved over time in the intervention group compared to the control group, revealing a significant estimated mean difference of \u22125.60 (Hedges\u2019 g\u00a0=\u00a00.84, <jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.001) after 12\u00a0weeks. Satisfaction and perceived cultural appropriateness was high and comparable to that of German students. The present study shows that a culturally non\u2010adapted internet\u2010based sleep intervention can be a low\u2010threshold treatment option to help meet the high demand for mental healthcare among international students. It thus indicates that cultural adaptation might not represent a precondition for providing effective internet\u2010based sleep interventions to this target group.<\/jats:p>","DOI":"10.1111\/jsr.13493","type":"journal-article","created":{"date-parts":[[2021,9,22]],"date-time":"2021-09-22T10:04:24Z","timestamp":1632305064000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Effectiveness of an internet\u2010based intervention to improve sleep difficulties in a culturally diverse sample of international students: A randomised controlled pilot study"],"prefix":"10.1111","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4889-1274","authenticated-orcid":false,"given":"Kerstin","family":"Spanhel","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Psychology and Psychotherapy Institute of Psychology University of Freiburg  Freiburg 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