Non-linear Growth Models in Mplus and SAS.
Non-linear Growth Models in Mplus and SAS.
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DOI:
10.1080/10705510903206055
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发表时间:
2009-10
期刊:
影响因子:
--
通讯作者:
Ram N
中科院分区:
文献类型:
--
作者:
Grimm KJ;Ram N
Non-linear growth curves or growth curves that follow a specified non-linear function in time enable researchers to model complex developmental patterns with parameters that are easily interpretable. In this paper we describe how a variety of sigmoid curves can be fit using the Mplus structural modeling program and the non-linear mixed-effects modeling procedure NLMIXED in SAS. Using longitudinal achievement data collected as part of a study examining the effects of preschool instruction on academic gain we illustrate the procedures for fitting growth models of logistic, Gompertz, and Richards functions. Brief notes regarding the practical benefits, limitations, and choices faced in the fitting and estimation of such models are included.
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