How you fall asleep at night may correlate with how outgoing you are, according to a new study.

The study, conducted by OnePoll on behalf of Leesa Sleep, examined the sleeping positions and personality traits of 2,000 Americans and found nearly half of Americans polled prefer to sleep on their sides.

There may be something to that preference, as side sleepers also get the most amount of sleep a night — at six hours on average. Side sleepers, however, take the most amount of time to fall asleep (24 minutes).

Side sleepers are also most likely to identify as night owls (33%) and extroverts (28%). Being a night owl may also be related to side sleepers’ movie genre preferences; four in 10 side sleepers reach for a horror movie.