Graphology unrelated to the handwriting metrics of graphologists. Professional graphologists using handwriting analysis were just as ineffective as lay people at predicting performance in a 1989 study. A broad literature screen done by King and Koehler confirmed dozens of studies showing the geometric aspects of graphology (slant, slope, "etc.") are essentially worthless predictors of job performance. Rowan Bayne, a British psychologist who has written several studies on graphology, summarized his view of the appeal of graphology: "[i]t's very seductive because at a very crude level someone who is neat and well behaved tends to have neat handwriting", adding that the practice
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"