“Rorschach” is the only name associated with projective personality tests. Projective tests involve ambiguous stimuli and are believed to reveal underlying thoughts and emotions. Rorschach was a leader in developing the scoring system for the Rorschach Inkblot test. “Millon” developed the Millon Clinical Multiaxial Inventory (MCMI-III), an objective personality test. “Hathaway” and “McKinley” are both associated with the Minnesota Multiphasic Personality Inventory (MMPI-2). Last, “Watson” was an American psychologist who founded behaviorism and is associated with classical conditioning.