Professor Chris Idzikowski, Director of the Sleep Assessment and Advisory Service at the Edinburgh Sleep Centre in Scotland, has analyzed six common sleeping positions and found that each is linked to a particular personality type.

“We are all aware of our body language when we are awake but this is the first time we have been able to see what our subconscious posture says about us. What’s interesting is that the profile behind the posture is often very different from what we would expect.”

Following are Professor Idzikowski’s findings, based on a survey taken by 1,000 participants.

The Fetus (41%)

Those who curl up in the fetal position are described as tough on the outside but sensitive at heart. They may be shy when they first meet somebody, but soon relax. This is the most common sleeping position, adopted by 41 percent of the survey participants. More than twice as many women as men tend to adopt this position.

The Log (15%)

The log is characterized by lying on your side with both arms down by your side. These sleepers are easygoing, social people who like being part of the in-crowd. They are trusting of strangers; however, they may be gullible.

The Yearner (13%)

People who sleep on their side with both arms out in front are said to have an open nature, but can be suspicious or cynical. They are slow to make up their minds, but once they have made a decision, they are unlikely ever to change it.

The Soldier (8%)

This position is characterized by lying on your back with both arms pinned to your sides. People who sleep in this position are generally quiet and reserved. They don’t like a fuss, but hold themselves and others to high standards.

The Freefall (7%)

People who lie on their front with their hands around the pillow and head turned to one side are often gregarious and brash. They can be nervy and thin-skinned underneath, and they don’t like criticism or extreme situations.

The remainder of those in the poll said the position in which they fell asleep varied or they did not know.