Objective personality tests involve administering standardized questions to examinees who select from fixed response options. They are economical to administer to large groups and scoring is objective. However, they do not account for individual motives and cognitions, so people with similar scores may differ. The Minnesota Multiphasic Personality Inventory identifies psychiatric diagnoses through items from prior tests and clinical experience assessing scales like depression, hysteria, and paranoia. Projective tests use unstructured stimuli to reveal examinees' needs, wishes, and conflicts through their open-ended responses, which are interpreted along multiple dimensions. Ethical testing requires competence, informed consent, confidentiality, and avoiding unfair disadvantages to minority groups.