No link was found between a full moon and how often people remember their dreams. Diaries kept by 196 participants for 28 to 111 nights showed no association between a full moon and dream recall. Psychological factors may explain why some people believe a full moon affects their dreaming.
People tend to remember their dreams more on mornings after they have slept longer than usual, even though individuals who generally sleep more do not recall dreams more often than those who sleep less. This conclusion comes from daily diaries kept by 196 participants over 28 to 111 days. The finding suggests that a person's own variation in sleep length, rather than their average sleep duration, influences dream recall. Morning sleep inertia may explain why longer sleep boosts recall.