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Recovery Man's Personality Inventory (RMPI)About this inventory The RMPI Inventory is an easy to use, paper and pencil style assessment that allows people to understand HOW they do what they do. Based on this knowledge an individual can adapt his or her behavior - based on the situation - and increase their personal effectiveness. Reliability Reliability is the degree of consistency with which a test measures what it is said to measure. Test length greatly affects reliability coefficients, with longer tests traditionally producing higher scores. Dr. J.C. Nunnally stated in the classic reference book, Psychometric Theory, that internal consistency reliability coefficients for short personality tests should range in the .70's to .80's. For example, the well researched Myers-Briggs Type Indicator reports internal consistency reliability for its four scales on general population samples to range from .61 to .87. Internal consistency reliability was computed on each of the four scales of the much shorter RMPI Inventory and the results ranged from .96 to .99. Thirty-day test-retest reliability produced scores ranging from .99 to 1.00. Given its very short length, the RMPI Inventory produced very solid reliability coefficients. Validity The validity scores of a test estimate how well the test measures what it purports to measure. Personality assessment tests usually produce validity scores for each of the individual traits measured. When scores on the traits of a test correlate well with scores on similar traits on other tests, the test is said to have good concurrent validity. Validity coefficients were computed on the RMPI Inventory traits by comparing these to the traits measured by the Myers-Briggs Type Indicator (MBTI), Sixteen Personality factors (16PF), and Holland Self-Directed Search (SDS). Very strong support for the validity of the traits measured by the RMPIInventory was garnered. Take the test yourself to gain increased understanding of your personality: |