Whether a test or procedure is reliable depends on the extent to which a test or measurement technique is consistent or repeatable. Validity is the extent to which a technique measures what it is intended to measure. To increase reliability and validity, psychologists rely on a battery of techniques. In all cases, using two methods of testing is better than relying on one. Most professionals combine a standardized test and a face-to-face interview. The examiner may also use behavioral observations, work samples, projective tests, questionnaires, or other techniques. Currently, the most popular objective measure of abnormal personality traits used by professionals in the nuclear industry is the Minnesota Multiphasic Personality Inventory. Many preemployment psychological procedures include a projective test of personality, which usually involves the analysis of open-ended responses to ambiguous stimuli like ink blots, pictures, sentences, or words. The most commonly used methods are the Rorschach, the Thematic Apperception Test, and the Incomplete Sentences Test. These tests are designed to identify motivations and needs not readily apparent from outward behavior or verbal reports. Test results, clinical impressions, and recommendations gathered in the various tests culminate in a psychological report. Care should be exercised to consider only the results pertinent to the objectives of the nuclear security program.