In old age, individual differences and intra-individual changes are quite common, and are often more pronounced than in earlier phases of adulthood (Baltes & Carstensen, 1996). Such diversity has been a central issue to many theories of life-span psychology and aging research. Accordingly, the assessment of older adults needs to take such diversity into account. In this chapter, we first provide an overview of the theoretical consideration of assessing older adults, including the role of images of aging, the principles of multidimensionality, multidirectionality, and plasticity, and the use of adaptive strategies. We then continue to discuss three central issues of psychological assessments with older adults. These issues include the facts that (1) many assessment tools for older adults were originally designed and normed for younger adults; (2) older adults may perform well in everyday functioning even though they may score low in standardized tests in the laboratory; in addition,and (3) contextual factors, such as age differences in goals and motivation, age differences in memory and other cognitive mechanics, and age/cohort differences in norms and expectations, may affect the performance of older adults in assessments. Finally, we suggest evidence-based solutions to address these issues.
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