The Kinsey scale, also called the Heterosexual-Homosexual Rating Scale, was first published in Sexual Behavior in the Human Male (1948) by Alfred Kinsey, Wardell Pomeroy, and Clyde Martin and also featured in Sexual Behavior in the Human Female (1953). The scale was developed to combat the assumption at the time that people are either heterosexual or homosexual and that these two types represent antitheses in the sexual world. Recognizing that a large portion of population is not completely heterosexual or homosexual and people can experience both heterosexual and homosexual behavior and psychic responses, Kinsey et al., stated: