Questions tagged [mplus]
Mplus refers to a commercial statistical modeling program for general statistical analysis.
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How to assess model fit for multilevel SEM (using Mplus)?
According to a preprint chapter by Sadikaj et al. (2019), the standard way to establish model fit for multilevel SEM is (1) develop a measurement model at each level if latent variables are included ...
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10 views
second ordered latent trait model
I am fitting a second ordered latent trait model Under IRT using 17 binary items. The model fitted using MLF estimator, with keep all loading free and set the variance=1.
My question is when i change ...
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15 views
Multi-group CFA in Mplus with Missing Indicator
I am conducting SEM analysis in Mplus where I have one latent factor with four items. I am trying to conduct a multigroup analysis(3 groups) to evaluate moderation from the latent factor to an ...
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Growth mixture model to establish trajectories of maternal depressive symptoms
We have been trying to conduct a growth mixture model to establish trajectories of maternal depressive symptoms. We have managed to set up a model in MPlus and it runs, but we have a few theoretical ...
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71 views
Wy do I get very bad fit indices for a moderation? (including a negative TLI!) / Multilevel Model
I'm testing L1 moderation models using Mplus.
I'm getting satisfactory fit indices for the model including my main predictor, then the model including a second predictor which will serve as moderator.
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Can I GROUPMEAN center one variable and not the second one involved in an interaction / Multilevel Model with L1 Moderation
I'm fitting a multilevel model with an L1 moderation on Mplus.
I am trying to demonstrate that the effect of X (independent variable / mean of scale items) on Y holds only when people do not make a ...
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1answer
55 views
Why is -2*Log Likelihood inreasing when I add a predictor? / Multilevel Model
I'm working on a multi-level model using Mplus and trying to fit a regression at level 1 (within level).
I'm surprised to see that adding a second predictor at the within level increases my -2LL (-2*...
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38 views
Pseudo-class regression for LGCA with multiply imputed data
I have fit a latent class growth analysis model (LGCA) using the lcmm package in R. I want to estimate a regression looking at predictors of class membership. I ...
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21 views
Why does R squared actually decrease after adding a quadratic term, using latent regression moderation?
Using a latent moderation method using Klein and Moosbrugger (2000) with the Mplus programme, I compare two models, where y = continuous latent outcome, x = continuous latent predictor, e = ...
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1answer
61 views
Getting different standard errors using mplus and lmer in R
I am fitting the same mixed effects model using mplus and lmer in R. Since mplus uses full ...
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125 views
Bifactor-model in Mplus - warning message: PSI is not positive-definite
This question is about: When does the warning massage appear?
I have a rather complicated model in Mplus that consists of three individual models. Each model consists of several manifest variables ...
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20 views
I am running a simple mediation model. How do I control for race, and if I do, will I loose statistical power?
I am running a simple mediation model in a path analysis framework using Mplus.
The direct path in my model is grades (independent variable) predicting happiness (dependent variable). The indirect ...
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78 views
How do I interpret fit statistics SEM and Modindices output?
I would need some help in understanding the SEM output. I run a latent change score analysis to test the change score of a variable of interest at two-time points (repeated measure) PLD1 and PLD2. in ...
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37 views
Three groups in 2-1-1 multilevel mediation model: Dropping cases for comparisons?
I have data from a randomized controlled trial with two treatments (Group A and B), one control group (Group C) and four measurement points with two mediators and two outcomes. Mediators and outcomes ...
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1answer
98 views
Latent Profile Analysis - standardizing the variables and interpreting it
This is the first time I'm running an LPA and prior to running it, I standardized all variables because I read that would help interpret the profile structure later.
And now I'm confused in the ...
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109 views
Calculate R² from regression estimates (beta coefficients, variances of variables etc.)
I need a generalisable way to to calculate $R^2$ from given regression estimates (regression coefficients, variances of variables, covariances between variables, residual variance of the response ...
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1answer
206 views
How to disaggregate level 1 residuals in lmer models in r
I am running a linear mixed model in r:
model <- lmer(variable ~ time +(1+time|id), data = long)
The output for random effects is:
...
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1answer
242 views
Correct Estimator for Path Analysis/SEM Using Categorical Covariate
I'm currently building a path analysis model with model-based corrections for measurement error, using a latent variable structural equation model (i.e., each observed variable serves as a single ...
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High non-invariance when using the Alignment method
I am attempting to use the Alignment within CFA method from Marsh et al. (2017) on 2015 PISA. However, six out of the nine factors have more than 25% non-invariance. What can be done to a dataset that ...
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1answer
51 views
Are direct effects between latent variable indicators ever appropriate?
I have a longitudinal structural model regressing 1 endogenous latent variable at Time 2 on 4 exogenous latent variables at Time 1. The modification indices in Mplus suggest including a direct effect ...
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84 views
Why correlations are different when they are calculated from latent variables (CFA), than when they are calculated from composite scores?
When I am doing a statistical analysis, first I take the measures of each of the constructs I am measuring and I create an average score. With these averages, I calculate the correlation between ...
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1answer
141 views
Correlation above 1 between second-order and first-order latent variable [closed]
So I ran CFA on an exhaustion measure comprising of three facets which were specified as first-order latent variables. When I added a secon-order latent variable to the model the correlation between ...
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20 views
Transforming scores of two different measures?
I'm working with two different measures of PTSD symptoms, the Acute Stress Disorder Scale (ASDS) and PTSD Checklist (PCL) in an LGMM model in MPlus. The model uses four time points of PTSD symptoms (...
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78 views
Effect Size/Variable Importance in Pathmodell with metric and binary predictors (using mplus)
i want to calculate the following Path-Model:
I got 4 variables refering to a specific place or spot (like a climbin-rock).
There are 2 Liking ratings, one cheap/expensive rating and one young/...
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1answer
184 views
Testing Inequality Constrained Hypotheses in SEM with lavaan
I'd like to know how can I test for inequality of estimates in a lavaan::sem() fitted model (using R)?
Also, is there a known ...
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1answer
653 views
Add control variables in moderated mediation model in Mplus
I am very inexperienced in SEM.
I am testing a moderated mediation model with two serial mediators (M1 and M2) of the X-Y relationship, and also one moderator (W) of the X-M1 relationship (a pathway). ...
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199 views
Intercept of latent variable underlying an observed categorical Variable
In Structural Equation Modeling one approach to deal with categorical Mediators is the "underlying latent variable approach".
However using this approach e.g. with the MPlus software, only thresholds ...
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1answer
99 views
Mplus multilevel model with variables of different length
Let's say I have 4 variables on the within person level - xa, ya, xb, yb.
xa and ya have each 100 trials, xb and yb have 200, and there are 150 subjects.
I want to build the following multilevel ...
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134 views
Growth Mixture Models in MPlus
I'm new to mixture modeling and MPLUS, so apologies if this question is misguided. I am currently working through a dataset and learning off of Higher-Order Growth Curves and Mixture Modeling with ...
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1answer
472 views
Using standardised scores in MPLUS
I would like to ask you if it is possible to use standardised z scores in MPLUS instead of raw scores for variables included in a mediation model.
I work on a study, where we have measured stress in ...
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245 views
Binary variable as a mediator and indirect effects estimation in SEM model by Mplus
I would really appreciate anyone's advice on my modeling in MPlus :)
So we are interested in estimating the indirect effects of X1 (t_health) and X2 (t_freq) on Y (cesd) through M (pa). PA is a ...
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1answer
545 views
Multilevel modeling with latent variables in Mplus
I have collected data points from 216 individuals. A1, A2, A3 are three performance measures to be combined into a latent variable lA. I have three observations on this measure for each individual. U ...
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1answer
1k views
Type complex vs two level
I am conducting a cfa (two level, with meaning of level 2;it is staff rating organizations and we care about organizations).
My question is what is the difference is in mplus between type=complex (...
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1answer
810 views
APIM analyses of dyadic data: comparing HLM/MLM to SEM results, data structures, SAS Proc Mixed vs. Mplus and more!
I have run a set of dyadic analyses (distinguishable dyads: mom, infant) using both an SEM panel approach, as well as via an MLM/HLM approach using Mplus. In short, while there are subtle differences ...
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1answer
1k views
Multilevel Moderation with nested data and repeated measures
I am currently trying to test a moderated mediation model with nested data and repeated measures.
My independent, moderator, mediator, and dependent variables are on the individual level. I used ...
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231 views
SEM with manifest categorical outcome variable
I'm examining if the Big Five personality traits have an effect on the relationship type someone is in.
The Five personality traits are latent with continuous indicators, while the dependent ...
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2answers
4k views
What are the assumptions to path analysis and how to test them?
There are some structural assumptions to path analysis that are not difficult ascertain. They are (a) no loops (b) no going forward and backward (c) a maximum of one curved arrow per path.
I am aware ...
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87 views
How to specify a significance test for intercept and slope between multiple latent groups
I have done a Latent Profile Analysis on 34 symptom-distress-items at beginning of psychotherapy treatment. I came up with 5 latent groups. The entropy of the model was 0.779
The average Latent ...
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1answer
1k views
Total indirect effects: Structural equation modeling
I'm trying to calculate the total indirect effects in a structural equation model with four exogenous latent variables, four latent mediators, and one outcome variable. Mplus gives the option for the "...
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2k views
Total R-squared: Structural Equation Model
I'm trying to calculate the total R-squared in a structural equation model. Basically, I want to compare models based on the amount of variance accounted for by the endogenous variables in general (I'...
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628 views
How to interpret the results when the models are constrained to be invariant in multi-group modeling
I have constrained two models to be equal, and based on the $\chi^2$ test there is no difference between the models, they are invariant. These two models contain exactly the same path coefficients. ...
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111 views
How to structure dataset and write syntax for mediation model with clustered data?
I have a dataset of 300+ students with teacher-reported data. There are 17 total teachers that reported data on the students.
I would like to run a model that tests mediation where the mediator is a ...
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1answer
55 views
Growth Modeling of Longitudinal Data: Growth factors as predictors in Regression
i have this following situation. I have a dataset of four measurement
occasions. In the first three occasions the same test was introduced.
This three timepoints are equidistant. The fourth data ...
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1answer
276 views
Create simulated path model dataset and save to CSV [closed]
I am teaching a multivariate stats class and wanted to give people some simulated datasets with mediation, path modeling, and other features. I know it's possible to run monte carlo studies in MPlus, ...
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1answer
1k views
Regression: Covariance table in spss vs. mplus
I want to use regression output (b, se B and cov of several predictors) as input for a new analysis.
One example: I want to compute:
SE^2(b1) + SE^2(b2) + 2 COV (b1,b2).
If I do a basic regression ...
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2answers
3k views
Factor correlations larger than 1
I'm doing a confirmatory factor analysis (CFA) in Mplus, testing a 5-factor PTSD model with responses (n=376) to a PTSD questionnaire (the Harvard Trauma Questionnaire). For some reason, the output ...
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1answer
3k views
Paired samples t-test using a structural equation modeling approach
Is it possible to perform a paired samples t-test in a structural equation modeling (SEM) program? I am confused, as I have found on the web that you can run a Wald test, but I am not sure if it is ...
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2answers
172 views
Appropriate way to treat [0,1]-distributed variables in HLM
Brief intro: I'm not really sure how to appropriately treat the dependent variables in a set of hierarchical linear models that I'm trying to run. In my models, Level 1 units are children and Level 2 ...
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1answer
737 views
Sample-adjusted meta-analytic deviancy macro/syntax for Excel, SPSS, MPLUS
I need to compute the sample-adjusted meta-analytic deviancy (SAMD) as part of an outlier search with meta-analytic data. Because we have a very large amount of meta-analytic data, computing this ...
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1answer
406 views
Exploratory Factor Analysis Results: No significant loadings on last factors
I am using MPlus 7.0 to run a factor analysis on a set of survey item data measuring positive traits. I have used both oblique and orthogonal rotations and also have run it as a bifactor model. I ...
