Despite the fact that most people sleep with someone beside them sleep studies have most often dealt with people as individuals. Attempting to overcome this was a team of researchers led by Taylor Elsey, from the University of Kentucky. The researchers studied 179 couples who filled out sleep diaries and surveys about their attachment security, avoidance and anxiety. The study found that greater attachment security and lower attachment avoidance were associated with better subjective sleep quality. More time spent in bed with one’s partners (as opposed to going to bed and getting up at different times) was associated with better sleep quality among women with lower attachment security and higher attachment avoidance.
You can read the abstract of this article here.