The purpose of this study is to compare two popular portable sleep monitoring devices—the Fitbit Charge®, Jawbone UP®, and SleepTime smartphone app—to the "gold standard" Polysomnography (PSG). Parameters that will be analyzed include sleep onset latency, sleep efficiency, and sleep staging. Specifically, this study will investigate the validity of the Jawbone UP®, Fitbit Charge®, and SleepTime app in detecting sleep and wakefulness in comparison to conventional Polysomnography (PSG).