"Data collection largely began with the now classic dissection of this madness, found in Love and Limerence, by Dorothy Tennov. Tennov devised approximately two hundred statements about romantic love and asked four hundred men and women at and around the University of Bridgeport, Connecticut, to respond with "true" or "false" reactions. Hundreds of additional individuals answered subsequent versions of her questionnaire. From their responses, as well as their diaries and other personal accounts, Tennov identified a constellation of characteristics common to this condition of "being in love," a state she called "limerence.""