Hypnosis: Medical Tool or Illusion?

A  The image most people have of the mysterious art of hypnotism is of a stage trick. But hypnotists are much more likely nowadays to be scientists seeking ways to probe the subconscious mind, or find a new way to relieve pain. But is hypnosis a real phenomenon? If so, what is it useful for? Over the past few years, researchers have found that hypnotized individuals actively respond to suggestions even though they sometimes perceive the dramatic changes in thought and behavior they experience as happening 'by themselves.' During hypnosis, it is as though the brain temporarily suspends its attempts to authenticate incoming sensory information. Some people are more hypnotizable than others, although scientists still don't know why. To study any phenomenon properly, researchers must first have a way to measure it. In the case of hypnosis, that yardstick is the Stanford Hypnotic Susceptibility Sca