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Mental time travel to the future might be reduced in sleep.

Jana Speth, Astrid M Schloerscheidt, Clemens Speth

Consciousness and Cognition February 1, 2017 DOI: 10.1016/j.concog.2016.11.006 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Observational study Peer reviewed
Sample size 563
Population Mentation reports from sleep onset, REM sleep, non-REM sleep, and waking
Keywords Hypnagogic hallucinations Linguistics Mentation reports Non-rem Quantitative linguistic analysis Sleep onset
Key findings REM and non-REM sleep are characterized by a reduction in mental time travel to the future compared to waking.

Abstract

We present a quantitative study of mental time travel to the future in sleep. Three independent, blind judges analysed a total of 563 physiology-monitored mentation reports from sleep onset, REM sleep, non-REM sleep, and waking. The linguistic tool for the mentation report analysis is based on established grammatical and cognitive-semantic theories and has been validated in previous studies. Our data indicate that REM and non-REM sleep must be characterized by a reduction in mental time travel to the future, which would support earlier physiological evidence at the level of brain function.

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