Latent Variable Modeling of Longitudinal

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본문내용
Latent Variable Modeling of Longitudinal
and Multilevel Substance Use Data
Intro
substance use 에 대한 초기의 관점 : 개인의 성향
Movement away from an emphasis on person variable and the focus
on nonreciprocal parent influences to a greater examination of person
environment interactions
많은 연구들에서 가족 멤버 간의 substance use의 유사성을 보이고 있음
이를 설명할 수 있는 새로운 관점이 필요
Intro
ㅁ Interdepepdence of Family data
- 가족 간에 공유하는 공통된 환경이 존재할 것임.
- 그러나 지금까지 심리학 연구에서는 그런 것을 고려할 적당한 방법이 없어서
IID 가정에서 분석을 진행했었음
위계적 구조를 다룰 수 있는 분석 방법의 필요성
multilevel analysis
within : similar(correlated) observation from each group
between : group from heterogeneous population
Intro
Multilevel SEM (Muthen, 1994)
Two different approach
clustered group
random coefficient
전통적인 방식으로 분석이 가능하나 simple random sampling에 대한
가정이 깨지고 이에 따라 underestimation of the true variance of the estimator
N개의 Group이 있다고 할 때, N-1개의 parameter specification필요
random effect model이 훨씬 더 parsimonious
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