Introduction to the Special Issue: The Impact and Treatment of Sleep Disturbance.

There is now widespread recognition that sleep disturbance is more than an epiphenomenon of psychopathology. Research on established evidence-based treatments for sleep disturbance have matured to focus on predictors and more flexible implementation modalities. Sleep disturbance overlaps and interacts with comorbid psychological disorders though a complex transdiagnostic process that impacts the development, maintenance, and treatment of psychological disorders. This special issue highlights a range of cutting-edge research on the management of common sleep disturbance and the interaction of sleep disturbance and psychological disorders. It is anticipated that the research described in these articles will stimulate additional investigations as well as provide important insights for clinicians working with individuals with sleep disturbance.