Herbert Silberer (February 28, 1882, Vienna - January 12, 1923) was a Viennese psychoanalyst involved with the professional circle surrounding Sigmund Freud which included other pioneers of psychological study as Carl Jung, Alfred Adler and others. He had a background in athletics and sports journalism. He was very interested in dreams, and in 1909 published a paper detailing his research into the hypnagogic state (the mental state in which the individual is between waking and sleeping). Silberer's contention was that the hypnagogic state is autosymbolic, meaning that the images and symbols pe...