# structural equation model

1. ### [MPlus] Using the Alignment Method with non-invariant factors

I am attempting to use the Alignment within CFA method from Marsh et al. (2017) on 2015 PISA. However, six out of nine factors have more than 25% non-invariance What can be done to a dataset that is found to be mostly non-invariant using the alignment method? Does this mean than the 6 factors...
2. ### SEM Mediation using bootstrapping approach

Hi, I am performing mediation analysis using structural equation modelling (I'm using the lavaan package in 'R'). I am using the bootstrapping approach (rather than the causal steps approach) and just wanted to clarify two things; 1) My understanding is that using this approach, the the...
3. ### AMOS Bayesian MCMC

When using Bayesian MCMC in AMOS, do the MCMC algorithms allow for nonlinearity? I know all the other estimation algorithms do not [e.g. maximum-likelihood (ML)]. Also, does anyone know of any research articles that involve Bayesian CFA and measurement invariance that is similar or the same...
4. ### Good CFA indices but poor SEM indices

Hi all, I was wondering if anyone could help me make sense of my results from Structural Equation Modelling for my Masters thesis. I've first conducted a CFA and obtained good fit indices, but SEM results have shown poor fit (χ2 (574) = 837.095, p <.001, GFI below .9 and RMSEA was .062...
5. ### R squared in structural equation modeling

Hello I recently started working with structural equation modeling. I am doing a study for which I tested a model like this: Var1 --> var2--> var3 --> var4. All variables are latent variables and have several indicators. Now, the R² of var3 is +-40% in this case. However, something strange...
6. ### overall model fit for generalized structural equation model

Hi All, I'm new to this forum, and I hope I can be both of help and find help. My current problem involves modeling longitudinal data. I have four waves of data and I'm examining employment status and rearrest as endogenous outcome variables. I have built and run a generalized structural...
7. ### SEM in AMOS, residual errors

Hello everybody, I need to report on a paper a model tested through SEM analyses in AMOS graphic, In the figure referees asked me to report "circles representing residual error measures for each indicator items"... well, I think I'll find the values in 'estimates'-->'variances', but which...
8. ### AMOS: covariance matrix only input based on ordered catagorical data - possible?

Hello, I am attempting to use AMOS to run a number of structural equation models. Several of my manifest variables are ordered categorical, a few (intended to be exogenous) are even binary. Unfortunately I only have access to secondary summary data (i.e. a covariance matrix with means and...
9. ### [Lisrel] Need help with Lisrel project

Hi, I am having trouble with my Lisrel Project. If there is someone who knows Lisrel, i would appreciate the help. I put my hypotheses, syntax and output in the attachments. Thanks in beforehand.
10. ### SEM - general applicability of analysis, variable aggregation, and data sufficiency

SEM - manifest variables and data sufficiency Dear all, I just discovered this amazing forum and was wondering whether some of you may have answers for some questions I could not find any clear answers to on the web or in tutorials: Research Design: The research I am doing is in the...
11. ### Bad fitting models - what to do next?

In my study I was doing studying attitudes and their influence on eachother using existing 7-point likert scales. To goal was to models these attitudes. I had almost 300 participants, 9 latent variables and about 30 items. I've first done a CFA, which couldn't achieve acceptable fit. I used the...
12. ### Examining whether a repeated measure is stable high, or non-stable over time

Dear all, I have conducted an experiment with a patient versus a control group, in which I asked them to do a reaction time tasks with control words and specific symptom words. The same reaction time task was used on three different days. We want to know whether the patient group shows a bias...
13. ### Non-positive definite matrix and second order confirmatory factor analysis

For my research I'm using SEM to model the relation between a couple of variables. All scales have been used in a 7 point likert format and most have been validated before in other research. In my dataset however, I have my doubts whether some these scales are truly measuring different concepts...
14. ### SEM: combining binary & ordinal variables

In my research I surveyed participants after they had used a website. I have 28 items which related 8 different concepts. Which means I have 8 latent variables with 3-6 observed variables each. All items are measured with 7-point likert scales. Additionally I have a binary variable of whether...
15. ### Mediation with Structural Equation Modeling....

First...Hello! My question is about how to test mediation with structural equation modeling. I know there is a way to test mediation with regression using a stage successive approach, but some people say it is very better to do mediation using structural equation modeling. Suppose I say...
16. ### Structural Equation Modelling....The simplest explanation you can give....

Ever since last year that i started my research SEM has proved to be a daunting task. Reading a lot of books and articles....I still have some simple questions that I like answers for....Being familiar with other regression analyses, SEM has tested my limits to stats and I am finally here to ask...
17. ### [Lisrel] strange warning message (The path from .. to .. could not be interpreted)

Hi everyone! I’m doing Structural Equation Modeling using Lisrel. I basically want to do a path model involving both observed and latent variables at the same time. The model that I want to test is a mediation model, meaning that I want to test if X => M (Mediation variable, obs. variable) => Y...
18. ### Possible to analyze cross lag panel data with regression alone (no SEM)?

I have 2 (soon to be 4) waves of panel data. I have a relatively small sample size so I don't think I should use SEM - also I don't really understand SEM! Is there any effective way to analyze these data using only regression or correlation analyses? Preferably analyzed using SPSS if possible...
19. ### Applying SEM model to mutually exclusive smaller datasets

Hello, I have an SEM model I am happy with and I am examining the standardized path coefficients. Then when I split the original data set into almost equal sized, mutually exclusive two smaller sized datasets based on Gender and apply my original model to get the standardized path...