Women who sleep well might have improved work-related ambitions, according to a new study published in the journal Sex Roles. Researchers at Washington State University surveyed 135 adult workers twice each day for two weeks. At lunchtime each day, participants reported how they slept the night before and described their current mood. Each evening, they reported their efforts towards status and responsibility at their job. The researchers found that better sleep quality appeared to have a direct impact on women’s moods and improved how they felt about advancing in their careers. Men’s sleep appeared to have no effect on their work ambitions.