Graphology pharmacological therapeutic agents. The study of these phenomena is a by-product of researchers investigating motor control processes and the interaction of nervous, anatomical, and biomechanical systems of the body. "The Vanguard Code of Ethical Practice", amongst others, prohibits medical diagnosis by those not licensed to do diagnosis in the state in which they practice. This is the pseudoscience of changing a person's handwriting with the goal of changing features of his or her personality, or "handwriting analysis in reverse." It originated in France during the 1930s, spreading to the United States in the late 1950s. The purported therapy consists of
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"