A comparison of two methods for analyzing longitudinal data: Tuckerized growth curves and an application of K means analysis
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abstract
Two longitudinal statistical methods are illustrated and compared. The first method, Tuckerized growth curve analysis (TGCA), is an extension of factor analysis, while the second method is an extension of K means analysis (KMA), a clustering technique. Both techniques make few assumptions of data and are useful for examining growth or change in longitudinal data. The two statistical methods are described and illustrated with group counseling data. The relative strengths and weaknesses of each technique are discussed.