Delayed Sleep Phase

The goal of this study is to understand factors that contribute to delayed sleep wake phase disorder (DSWPD). The investigators will examine whether patients with DSWPD exhibit alterations in circadian rhythms and sensitivity to light compared to healthy controls. The investigators will also test a new method of predicting circadian rhythms form a blood sample.

This trial aims to investigate whether morning bright light therapy can reduce the progression rate of idiopathic scoliosis in children and potentially prevent its de novo development.

The overall aim of this proposal is a confirmatory efficacy trial sufficiently powered and designed to test the hypothesis that improving the relationship between biological circadian timing and waketime, a novel modifiable target, improves depression outcomes in a subgroup of adolescents with depression and a misaligned relationship between biological circadian timing and waketime utilizing a cognitive-behavioral sleep intervention.