i-Sleep: Internet-based Treatment for Insomnia (i-Sleep)

In this study, people who suffer from insomnia will be randomized to one of three study conditions. The first group receives a multicomponent internet-based cognitive behavioral self-help intervention. The second group has access to an internet-based self-help sleep restriction intervention. The third group is a waiting control group. In both active conditions additional care or treatment is allowed. The aim of the study is to investigate the effectiveness of a multicomponent internet-based cognitive behavioral self-help intervention as well as a stand-alone internet-based self-help sleep restriction intervention for insomnia symptoms compared to a waiting list. Assessments take place at baseline, and 8-weeks and 6-months post-randomization. After 8 weeks, participants in the waiting control group get access to the internet-based cognitive behavioural self-help intervention and also fill out questionnaires at 6-months post-randomization.

Internet-based self-help on the basis of (Perlis, M. L., Jungquist, C., Smith, M. T., & Posner, D., 2006). The self-help program consists of eight text-based sessions and tasks. All participants in the active conditions receive guidance during 8-weeks treatment.

Internet-based self-help on the basis of (Perlis, M. L., Jungquist, C., Smith, M. T., & Posner, D., 2006). The self-help program consists of five text-based sessions and tasks. All participants in the active conditions receive guidance during 8-weeks treatment.

Inclusion Criteria: Being 18 years of age or older Meet ICSD-3 diagnostic criteria for Insomnia as confirmed by the telephone administered Interview Acess to the Internet Written informed consent Exclusion Criteria: Physiological Insomnia Serious psychiatric co-morbidity that requires alternative treatment including major depression disorder, anxiety disorder, substance dependence, bipolar affective disorder, psychotic illness Epilepsy (seizure disorder)