In the early 1970s, Daniel Oldis of the University of South Dakota leveraged the scientific principle of external sensory incorporation in an attempt to influence dream content and evoke lucidity. Three psychological techniques were employed: subconscious suggestion using a tape played before and during sleep; associative signaling using a muffled bell alarm timed to go off during REM sleep; and classical conditioning using a REM detection circuit and a bright eye-light. The results indicated that lucid dreaming can be facilitated using external cues and psychological methods. |
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