A study by UCLA assistant professor Kerri Johnson found that observers were able to accurately guess the sexual orientation of men 60 percent of the time, slightly better than would be achieved by random chance; with women, their guesses didn't exceed chance. Although the study was designed to reveal information about the perception of the observer, it has been misinterpreted as conveying reliable information about the sexual orientation of the participants. Gender-specific body movements are not reliably associated with a person's sexual orientation; this is true of face shape, but surprisingly not for voices, even though people think they are associated with a person's sexual orientation. A handful of studies have investigated the question of gaydar from the voice. They have found that people can tell who is gay and straight from their voices, but have mostly focused on men (sometimes terming the vocal difference "gay lisp"). Detailed acoustic analyses have highlighted a number of factors in a person's voice that are used, one of which is the way that gay and straight men pronounce "s" sounds.