Advanced Sleep Phase Disorder

Research output: Chapter in Book/Report/Conference proceedingEntry for encyclopedia/dictionary


Advanced sleep phase disorder (ASPD) is a circadian rhythm disorder in which sleep times are advanced (or timed early) relative to conventional or desired times. Individuals with ASPD experience overwhelming sleepiness in the late afternoon and early evening and chronic difficulty maintaining sleep during the latter half of the sleep period, often waking earlier than intended. This entry describes the clinical features, prevalence, and etiology of ASPD and discusses treatments.
Original languageEnglish
Title of host publicationThe SAGE Encyclopedia of Abnormal and Clinical Psychology
EditorsAmy Wenzel
PublisherSage Publishing
Number of pages3
ISBN (Print)9781483365831
Publication statusPublished - 2017


  • clinical psychology
  • sleep disorders
  • sleep patterns


Dive into the research topics of 'Advanced Sleep Phase Disorder'. Together they form a unique fingerprint.

Cite this