Psychology of dreams is the scientific study of dreams, called oneirology; most modern research focuses on their neurophysiology and tests hypotheses about their function, but their origin and purpose remain unknown.
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During REM sleep, some brain regions fully active during waking are activated only in a partial or fragmentary way. Textbook author James W. Kalat explains that the cortex combines this haphazard input with other activity and does its best to synthesize a story that makes sense of the information. Selective memory effect is remembering accurate predictions while forgetting inaccurate ones. In one experiment, subjects wrote their dreams in a diary, which prevented this effect, and the dreams no longer seemed accurate about the future. In the psychology of dreams, adults report remembering around two dreams per week, on average.
Dream researchers study reports of what people say or write down after waking, not dreams directly, so they still haven't really found a way to record what someone else is dreaming about. Dreams might seem impossible to study directly because they are personal, subjective and fleeting.
The Dreamers by Karen Thompson Walker describes a mysterious illness in which people fall asleep and cannot be roused, while a psychiatrist tries to make sense of its spread and those infected show unusual levels of brain activity. This gives readers a fictional account of sleep and brain activity to consider alongside questions about dreams.
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