Psychologist Roy Baumeister has coined the term “ego depletion” to describe a level of fatigue that goes beyond mere physical tiredness. People living in this depleted condition report more tiredness and negative emotions, but those are not the only effects. Depleted people who watch a sad movie become extra sad. When facing temptations like eating chocolate chip cookies, they are more likely to give in. When faced with challenges like an especially difficult assignment at work, they are more likely to fail or turn in lower quality work. The brain area that’s crucial for self-control (the
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