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Introductory And Intermediate Growth Models - Mplus

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Random Effects: Multilevel<strong>And</strong> Mixed Linear Modeling (Continued)Mixed linear model:y ti = fixed part + random part (43)= α 0 + γ 0 w i + (α 1 + γ 1 w i ) x ti +(α + γ w i ) w ti (44)+ ζ 0i + ζ 1i x ti + ζ i w ti + ε ti . (45)E.g. “time X w i ” refers to γ 1 (e.g. Rao, 1958; Laird &Ware, 1982; Jennrich & Sluchter, 1986; Lindstrom & Bates,1988; BMDP5V; Goldstein, 2003, MLwiN; SAS PROCMIXED-Littell et al. 1996 and Singer, 1999).31Random Effects: SEM <strong>And</strong>Multilevel ModelingSEM (Tucker, 1958; Meredith & Tisak, 1990; McArdle &Epstein 1987; SEM software):Measurement part:y ti = η 0i + η 1i x t + κ t w ti + ε ti . (46)Compare with level 1 of multilevel:y ti = η 0i + η 1i x ti + κ i w ti + ε ti . (47)Multilevel approach:• x ti as data: Flexible individually-varying times ofobservation• Slopes for time-varying covariates vary over individuals3216

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