In research conducted by Amie Gordon and Serena Chen from University of California Berkeley, to be published in Social Psychological and Personality Science, participants completed a brief online survey each day for two weeks, in which they reported on on their sleep quality (how long they slept, how many
times they woke up
during the
night, how
alert they felt upon waking, and how tired they felt
during the day) and relationship conflict.1 Over the two - week study, people who slept worse on average reported more day - to - day conflict with their partners.