Latent Change Score Analysis of the Impacts of Memory Training in the Elderly from a Randomized Clinical Trial

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ProQuest, 2008 - 62 pages
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Latent Change Score models are used to examine training effects in a randomized clinical trial on memory training (see McArdle & Prindle, 2008). Data are taken from the Memory and Control groups of ACTIVE (Jobe, Smith, Ball, et al., 2001). First, we examined mean differences in SEMs and find training effects within the trained domain (memory) and transfer to everyday problem solving present for both groups. Second, pre-post test latent change score models find mean training effects for the memory variable with less transfer of training. Third, we use two common factor models to test measurement. Standard likelihood ratio testing suggests invariant loadings do not fit the Near factor but fit the Far factor. Fourth, a latent change score model with common factors did not offer any new information over previous models. Implications and ideas for future analyses are presented in the discussion section.
  

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Contents

Introduction
1
Study Methods and Procedures
9
Analysis 1 Post Treatment Effects
20
Analysis 2 PrePost Treatment Effects
26
Analysis 3 Measurement Invariance Effects
32
Analysis 4 Bivariate Latent Change Scores
37
Analysis 5 Adding Covariates to the Models
41
Discussion
45
Bibliography
49
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