If you’ve noticed a change in your mood, it may be attributed to a change in your sleep patterns. A new study found that interrupted sleep may be directly correlated with mood. “Researchers checked 62 healthy people into a hospital sleep lab for three nights and randomly assigned them to one of three bedtime fates: uninterrupted rest, delayed bedtimes or consecutive nights of eight forced awakenings…the group assigned to forced awakenings had a 31 percent reduction in positive mood compared with a 12 percent decline for the group that had delayed bedtimes…The lack of sufficient slow wave sleep was tied to a reduction in positive mood, and it was also linked to lower energy levels and reduced feelings of sympathy and friendliness.” The study counted on the ability for the participants to report on their emotions which is always a risk factor in studies. 

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