Scientists “swap bodies” of friends and discover that they also swap personalities / Boing Boing


Scientists from the Brain, Body, and Self Laboratory at Karolinska Institutet in Sweden equipped a couple of friends with video glasses so that they could see things from each other’s point of view. “To promote the illusion,” Science Daily reports, “they simultaneously applied touches to both participants on matching body parts so that they could also feel what they saw in the glasses.” They discovered that the study participants “liked themselves more than the friend in whose body they were.”

After only a few moments, the illusion generally worked; to show that it did, the researchers threatened the friend’s body with a paring knife and found that the participant broke out in sweat as if they were the one who was threatened. “Body swapping is no longer a domain reserved for science fiction movies,” says Tacikowski.

Participants only felt that they had been “awake in someone else’s body for a short period of time,” but that was long enough to significantly change their self-perception. Before changing the body, participants assess their friends on characteristics such as speech, cheerfulness, independence and confidence. Compared to this baseline, during the exchange they tend to rate themselves as more similar to the friend in whose body they were.