Previous thinking suggested that you would feel more tickled if the action were carried out by somebody you knew rather than a stranger. But psychologists at the University of California at San Diego disproved the idea. They took 34 blindfolded volunteers into a room to be tickled either with the robotic hand or by a person.
In fact, all the tickling was carried out by a scientist hiding under a sheet. To the students it made no difference: they reported feeling equally tickled whichever they were told was doing the stroking. Ticklishness, say the researchers, is a reflex, not an emotional reaction. Charles ArthurReuse content