Sleep medicine
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Guided Internet cognitive behavioral therapy for insomnia (CBTI) offers an effective treatment for adolescents, but little is known about the active ingredients of therapeutic feedback on outcomes. ⋯ This first longitudinal study into effects of therapeutic feedback in adolescent Internet CBTI indicated that emphasizing knowledge about sleep might contribute to insomnia improvement. The structured nature of the preprogrammed treatment content, delay of therapeutic feedback due to standardized timing, and unintentional reinforcement of undesirable behavior by giving attention to failures might explain the negative results of encouraging behavior. Further research to identify effective therapeutic factors in Internet therapy is warranted.