nightmare

n. a frightening or otherwise disturbing dream in which fear, sadness, despair, disgust, or some combination thereof forms the emotional content. Nightmares contain visual imagery and some degree of narrative structure and typically occur during REM sleep. The dreamer tends to waken suddenly from a nightmare and is immediately alert and aware of his or her surroundings. See nightmare disorder; sleep terror disorder. —nightmarish adj.

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Psychology term of the day

November 24th 2024

commonality analysis

in multiple regression, a technique by which the known variance in an outcome or response variable is separated out into the parts that can be uniquely attributed to each individual predictor variable and the parts that are common to any two or more variables.