Transcription of PART I Developmental Designs - Wiley-Blackwell
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Longitudinal and cross - sectional Designs1 part IDevelopmental DesignsHORC0111/8/04, 9:14 AM12 Schmidt, TetiHORC0111/8/04, 9:14 AM2 Longitudinal and cross - sectional Designs3 CHAPTER ONEI ssues in the Use of Longitudinal andCross- sectional DesignsKelly Robinson Todd Schmidt and Douglas M. TetiBaltes, Reese, and Nesselroade (1977) defined the task of Developmental science as the description, explanation, and modification (optimization) of intraindividual change inbehavior and interindividual differences in such change across the life span (p.)
Longitudinal and Cross-Sectional Designs5 that one variable in the model has no effect on the dependent variable (Schaie, 1986). Another limitation of the model is that it assumes that change occurs incrementally over
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