On two-wave measurement of individual change and initial value dependence.
This article focuses on two-wave change measurement and initial value dependence. Initially, some general methodological limitations associated with individual change measurement in a two assessment context are discussed. The method of "intra-individual and group-differential measurement of change" (Rueckert, 1989) is next evaluated. Use of a structural equation modeling approach is advocated in two-wave designs where the intention is to estimate the degree of interrelationship between growth or decline in a repeatedly assessed psychological construct and other variables. This approach is applied with the recently developed program RAMONA to the study of practice effects in a cognitive intervention study of plasticity in fluid intelligence of aged adults (Baltes, Dittmann-Kohli, & Kliegl, 1986).
Raykov
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Department of Psychology, University of Melbourne, Parkville, VIC, Australia.
D000368:Aged; D006801:Humans; D007206:Individuality; D007361:Intelligence Tests / Q000706:statistics & numerical data; D008432:Mathematical Computing; D015233:Models, Statistical; D011594:Psychometrics / Q000379:methods*; D012984:Software; D016896:Treatment Outcome