title: Methodological issues in aging research.
authors: University of Massachusetts at Amherst.
authors: A L
authors: AL
authors: Balazs
authors: T S
authors: TS
authors: Gruca
authors: C D
authors: CD
authors: Schewe
mesh_terms: D000368:Aged / Q000523:psychology*; D006299:Health Services for the Aged; D006315:Hearing Loss, Functional; D006801:Humans; D008389:Marketing of Health Services / Q000379:methods*; D012107:Research Design; D014481:United States; D014786:Vision Disorders