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Herbert Spiegel (June 29, 1914 – December 15, 2009) was an American psychiatrist who popularized therapeutic hypnosis as a mainstream medical treatment for patients experiencing pain, anxiety, and addictions. He also is known for his treatment of the woman known as Sybil, whose case became the subject of a book, 1976 television miniseries and 2007 television movie. Herbert Spiegel was the father of David Spiegel, M.D., of Stanford University, who is also an expert in hypnosis.