Research suggests that how often people check social media − and how emotionally engaged they are with it − can influence sleep even more than how much time they spend online.

Another key psychological mechanism contributing to sleep procrastination is delay discounting; the favouring of immediate ...

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

GP with an interest in women’s health Dr Laura Patterson discusses key issues in identifying and managing symptoms of ...