The American Psychological Association defines hypnosis as a state of consciousness involving focused attention and reduced peripheral awareness characterized by an enhanced capacity to respond to suggestions. Hypnotizability is defined as an individual's ability to experience suggested alterations in physiology, sensations, emotions, thoughts or behavior during hypnosis. The capacity for hypnosis and the ability to use one’s hypnotic talent in hypnotically augmented psychotherapy can be reliably measured by a well-trained clinician in a matter of minutes. A hypnotic induction is simply a psychological procedure designed to bring about a state of hypnosis. As Dr. David Spiegel of Stanford University, one of the authors of the APA definition of hypnosis explains, hypnotic states can be experienced in a matter of seconds without prolonged inductions or convoluted language. But hypnosis alone is not hypnotherapy. Rather, hypnotherapy is the use of hypnosis in the treatment of a medical or psychological disorder or concern to acclerate the efficiency and amplify the effectiveness of a therapeutic strategy.