newscientist.com: by Anil Ananthaswamy

Champions of free will, take heart. A landmark 1980s experiment that purported to show free will doesn’t exist is being challenged.

In 1983, neuroscientist Benjamin Libet asked volunteers wearing scalp electrodes to flex a finger or wrist. When they did, the movements were preceded by a dip in the signals being recorded, called the “readiness potential”. Libet interpreted this RP as the brain preparing for movement. [ more ]