True Response Inconsistency Scale (TRIN, MMPI)
A validity scale on the Minnesota Multiphasic Personality Inventory (MMPI) consisting of 23 pairs of items very similar in content but phrased to elicit opposite responses. Inconsistent responding for a given pair occurs when the response to both items is either true (14 of the pairs) or false (nine pairs). The TRIN score is not a measure of inconsistent responding per se. Rather, it reflects a tendency toward “yea-saying” (high scores) or “nay-saying” (low scores). The TRIN scale can be analyzed to explain elevations in other MMPI-2 scales, particularly the F scale. The clinical neuropsychologist integrates information from MMPI inconsistency measures together with other neuropsychological data and symptom validity scores to determine whether the inconsistency reflects random responding and/or carelessness versus a cognitive impairment issue (e.g., reading comprehension and attention). Readers are referred to the MMPI entry for a discussion of limitations of...