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Category: Psychology

  • Research: Sleep Deprivation Is a Leadership Problem

    Research: Sleep Deprivation Is a Leadership Problem

    Harvard Business Review Logo

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    Sleep deprivation remains widespread among leaders, and many leaders underestimate how much fatigue affects their performance. A new survey of 1,009 U.S. managers and executives suggests that the

    At 8:40 a.m. on a Friday, a leadership team gathers to make the biggest call of its quarter. The CEO hasn’t had enough sleep all week, but nobody knows that, because she arrived energized, with a coffee in her hand, performing alertness the way many senior leaders learn to do. She’s far from the only one in the room performing alertness, though. Many of the others in the room are hiding their own sleep deprivation—which means the decision they’re all about to make may be shaped as much by the sleep they’ve lost this week as by the analysis in front of them.

  • Optimism Is Now an Essential Leadership Skill

    Optimism Is Now an Essential Leadership Skill

    October 06, 2026

    Optimism isn’t about ignoring problems or pretending everything will work out. It’s about acknowledging challenges while believing that your actions can still make a difference. Psychologist and researcher Michelle Gielan says leaders can cultivate that mindset in themselves and their teams and argues that, when they do, it creates a powerful performance advantage. Drawing on an 11-year dataset of more than 25,000 business professionals, she shares research linking optimism to higher productivity, sales, engagement, and lower burnout. She explains how leaders can use techniques like “power leads” to help teams focus on progress and possibility without losing sight of difficult realities. Gielan wrote the book Resilient Optimism: The Science of Sustaining a Positive Mindset in Tough Times and the HBR article “How Leaders Counter Pessimism in Trying Times.“