NREM sleep

nonrapid-eye-movement sleep: four sleep stages in which there is an absence of rapid eye movement (REM) and dreams are relatively uncommon (and usually cannot be recalled upon awakening). The increasing appearance of delta waves, particularly in stages 3 and 4, is another prominent index of NREM sleep. Also called non-REM sleep; synchronized sleep. Compare REM sleep.

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Psychology term of the day

February 2nd 2025

statistical prediction

the process of using correlations between variables to hypothesize about future events and outcomes. For example, a university administrator may use a regression equation to predict a student’s college grade point average with reasonable accuracy from measures of performance in high school, such as scores on tests and final grades in classes.