The distinction of between-person age differences from within-person age changes is necessary for understanding aging-related change processes. Although longitudinal studies are required to address issues relating to within-person change, most studies begin using age-heterogeneous samples and conclude using survival-heterogeneous samples. Given the numerous potential confounds associated with age-heterogeneous samples, careful treatment of between-person age differences is essential to obtain the correct inferences regarding within-person age change. The authors demonstrate how failure to differentiate between-person age effects (and by extension, of survival age or other effects producing sample heterogeneity) will lead to uninterpretable inferences regarding within-person change. The authors recommend that convergence of age differences and age changes be formally evaluated whenever possible.
ASJC Scopus subject areas
- Developmental and Educational Psychology
- Social Psychology
Evaluating convergence of within-person change and between-person age differences in age-heterogeneous longitudinal studies. / Sliwinski, Martin; Hoffman, Lesa; Hofer, Scott.In: Research in Human Development, Vol. 7, No. 1, 01.2010, p. 45-60.
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