The Functional Performance Measure for Persons with Alzheimer Disease: Reliability and Validity
The Functional Performance Measure (FPM) is an instrument developed from grounded theory, and measures daily function in persons with Alzheimer Disease. This paper presents a study testing the reliability and validity of the FPM. The study design is based upon generalizability theory that allows the examination of several “facets” to the total variance of the FPM. Twenty-two clients with Alzheimer disease were videotaped performing three activities of daily living. Twelve raters evaluated the clients' performance using the FPM giving 792 completed measures. The FPM demonstrates high inter-rater reliability, moderate reliability across tasks, and criterion and construct validity. The FPM is a measure that will help occupational therapists identify clients' abilities and deficits so that therapists can determine intervention strategies to improve or maintain clients' functional performance.