World War I was a catalyst for the study of Industrial-Organizational Psychology. This was a time in which many psychologists hoped to thrive by providing “a valuable service to the nation” as Paul M. Muchinsky, author of Psychology Applied to Work put it. Robert Yerkes was monumental in the movement to bring psychology into war. Some of his many ideas included ways to screen recruits for mental deficiency, and a way to better assign work to said recruits. A committee was also formed, this group of psychologists began looking into soldier motivation and morale. The army was still very skeptical of such science but provided enough support to see how it panned out. Yerkes and his team classified and placed soldiers after conducting one of the