There is a study on sleeping positions which scientist believes closely related to personality. Professor Chris Idzikowski, director of the Sleep Assessment and Advisory Service, has analyzed six common sleeping positions. The article has not mention how he came up with the result, but it is pretty interesting to see the position and the relevant personality, such as the log position:
… Log (15%): Lying on your side with both arms down by your side. These sleepers are easy going, social people who like being part of the in-crowd, and who are trusting of strangers. However, they may be gullible…
What is your sleeping position, and do you think the result reflect to your personality?
Sleep position gives personality clue – [BBC News]