Psychometric evaluation of a proposed Alzheimer's aggression scale

The purpose of this study was to evaluate a popular measure of Alzheimer's disease (AD) memory and behavior problems and to determine whether its aggressive behavior items coalesced empirically as a subscale to form a psychometrically viable AD aggression measure for clinicians. Data from self-report questionnaires were examined from 419 informal AD caregivers in the southern United States. Principal axis factoring revealed a unidimensional solution with robust item loadings on the single factor. Three forms of reliability analysis indicated moderately strong internal consistency on this proposed measure. Evidence of convergent validity analysis was suggested via the measure's significant correlations to theoretically linked constructs. The proposed measure emerged as a reliable and valid tool for health care practitioners for the appraisal of problematic AD aggression behaviors from the caregiver perspective.