Lucid dream

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In the psychology subfield of oneirology, a lucid dream is a type of dream wherein the dreamer knows that they are dreaming while in their dream. The capacity to have and sustain lucid dreams is a trainable cognitive skill. During a lucid dream, the dreamer may gain some amount of volitional control over the dream characters, narrative, or environment, although this control of dream content is not the defining feature of lucid dreaming. Lucid dreams can be objectively identified during sleep using predetermined eye-movement signals. In formal psychology, lucid dreaming has been studied and reported for many years. Prominent figures from ancient to modern times have been fascinated by lucid dreams and have sought ways to better understand their causes and purpose. Many different theories have emerged as a result of scientific research on the subject. Further developments in psychological research have pointed to ways in which this form of dreaming may be utilized as a therapeutic technique...

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