People often talk about being or not being "a morning person." This is referred to by personality psychologists as

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The morning-eveningness trait, also known as chronotype, refers to an individual's preference for being active during the morning or the evening. People who prefer to wake up early and feel most alert during the morning are considered "morning people," while those who prefer to stay up late and feel most awake at night are considered "evening people." The other options (reinforcement sensitivity, behavioral activation system, behavioral inhibition system) are related to different aspects of personality and do not directly relate to morning or evening preferences.

People Often Talk About Being or Not Being "A Morning