use one sleeping position as a reliable measure of personality.
Does Science Support Sleep-Personality Tests?
This is the important distinction.
Researchers do study relationships between sleep, behavior, health, emotions, and psychological characteristics.
But that is very different from saying that sleeping in a particular position means you have a particular personality.
Popular “sleep personality” charts often take broad observations and turn them into confident-sounding personality descriptions.
They can be fun to read, but they shouldn’t be confused with scientifically validated psychological assessments.
