Final answer:
The MMPI-2-RF was normed using a representative national sample. It is a widely used psychological assessment tool, taking less time to complete compared to previous versions and is known for its reliability over time.
Step-by-step explanation:
The Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) was normed based on a national sample. The MMPI-2-RF is an updated version of the MMPI-2, itself a revision of the original MMPI. The MMPI-2-RF has 338 items and offers a more efficient assessment than its predecessor, taking less time to complete. This instrument is designed to measure a broad range of psychological conditions and is used in various settings including clinical diagnosis, occupational screening, and counseling. Reliability scales ensure that an individual's score on the MMPI-2-RF remains consistent over time and reflect changes due to experiences or conditions as demonstrated by Beutler, Nussbaum, and Meredith (1988) in their study involving police officers.