lavaan | an R package for structural equation modeling and more | Machine Learning library
kandi X-RAY | lavaan Summary
kandi X-RAY | lavaan Summary
lavaan is a free, open source R package for latent variable analysis. You can use lavaan to estimate a large variety of multivariate statistical models, including path analysis, confirmatory factor analysis, structural equation modeling and growth curve models. The lavaan package is developed to provide useRs, researchers and teachers a free open-source, but commercial-quality package for latent variable modeling. The long-term goal of lavaan is to implement all the state-of-the-art capabilities that are currently available in commercial packages. However, lavaan is still under development, and much work still needs to be done.
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Community Discussions
Trending Discussions on lavaan
QUESTION
I found a nice function on OSF, which I would like to apply to my own data: https://osf.io/huy8b/
However, if I try to use the lapply function, I get an error. My code and sample data (my own dataset is much bigger) are here.
...ANSWER
Answered 2021-Mar-29 at 13:49These are not suitable places to use lapply
. The functions just take the data frames as inputs, so you can just use the functions. For example:
QUESTION
I am trying to do a CFA for the first time. Lavaan gives the following error.
...ANSWER
Answered 2021-Apr-23 at 13:03It is quite simple:
QUESTION
ANSWER
Answered 2021-Mar-27 at 10:42Well, first let's check how does the CFI estimator works:
Usually, SEM programs do not present CFI values below 0, as such if a negative value is obtained, the software shows 0.
An example:
QUESTION
I want to draw the following diagram in R:
I saw that the lavaan
package has a function to build diagrams, however you need to provide an already fitted model. I just want to build the diagram above with my own coefficients and use it in Rmarkdown. Is there any straightforward way to achieve this? Colors are not important.
ANSWER
Answered 2021-Mar-26 at 08:51Here is one solution:
QUESTION
I am currently working on running a SEM analysis in Lavaan and I am running into a few problems. Before running the full sem, I intended to run a CFA to replicate the psychometric testing done with this measure I am using. This measure has 24 items, which make up 5 subscales (latent variables), which in turn load onto a total "higher-order" factor. I try to estimate this model in two different ways: (1) A five-factor model (without a higher order factor) in which all 5 subscales are allowed to correlate and (2) a higher-order model with a TOTAL latent variable made up of those 5 suscales.
The first model has five correlated latents (FNR, FOB...FAA) factors, with variance fixed to 1. This model converges without errors and fits the data. The second model also works, as long as I don't specify that the subscales (FNR, FOB..) that make up the FTOTAL latent variable are correlated. However, if I specified that these subscales are correlated (#Residual correlations part), the model still runs but gives me the error "lavaan WARNING: could not compute standard errors! The information matrix could not be inverted. This may be a symptom that the model is not identified." If I remove the residuals correlation from Model 2, the model runs without error. The R code for both is the following:
...ANSWER
Answered 2021-Mar-19 at 11:17You do not need to specify the correlations among first-order factors. The default options of lavaan
will correlate them. If do not want to correlate them you can use the orthogonal=T
inside the cfa()
function.
QUESTION
I am trying to analyze three repeated measures of two outcome variables. It was recommended to use a latent growth curve model. I know in some software (SPSS) you can make growth curves with multiple measures, but it doesn't seem as straightforward in lavaan. Reading the lavaan tutorial it mentions multilevel SEM using sem() - is this appropriate for a repeated measures dataset? Or is there another package that allows multiple outcome growth curves in R?
...ANSWER
Answered 2021-Mar-19 at 02:24To create a latent growth curve within lavaan
is easy, see the example bellow (with 4 timepoints):
QUESTION
I am trying to use semPlot::semPaths to make a plot of a bifactor model I ran in lavaan. The documentation for semPlot and qgraph is really great, so I've been able to figure out most of the specifications I want, but there's one thing I'm not sure is fixable. As you can see in the plot below, when a latent factor (e.g., "ext") is connected to a wide range of manifest variables, it becomes difficult to track which arrows/labels are associated with which manifest variables. (For example, it's hard to tell that the ext loading for adhd3 is .23.) It looks like the arrow is trying to connect to the center of the manifest variable labels, rather than the closest side. Is there any way to change this so it's a bit easier to read? Thank you so much!
Here is the code I used (sorry it's clunky-- 1) I'm new to this and 2) the latent variables were automatically in weird places so I defined their positions manually):
...ANSWER
Answered 2021-Mar-16 at 09:27This can be done using edge connect points in qgraph! See below:
QUESTION
I am trying to plot a path diagram of a Structural Equation Model(SEM) in r. I was able to plot it using semPlot::semPaths(). The output is similar to The SEM was modeled using lavaan package.
I want a plot similar to . with estimates and p values. Can anyone help me out. Thanks in advance.
...ANSWER
Answered 2021-Mar-13 at 05:02check this example, it might be helpful https://rstudio-pubs-static.s3.amazonaws.com/78926_5aa94ae32fae49f3a384ce885744ef4a.html
QUESTION
I am a rather new user of lavaan and have been trying to build a moderator model with a continuous moderator and an interaction term with a latent variable. I would like to hear your feedback on my code and especially whether my approach seems appropriate regarding adding the interaction term afterwards (as it requires saving the latent variable in the data frame). Just to give a short description of my study: I investigate the relationship between stress and burnout, and whether social support moderates this association. Unfortunately, I don’t have the actual data yet, so I cannot give information on the possible warning/error messages.
...ANSWER
Answered 2021-Mar-12 at 14:19Since you did not provide actual data, I will produce an example using the HolzingerSwineford1939 data frame. The library semTools
has a function to make products of indicators using no centering, mean centering, double-mean centering, or residual centering:
QUESTION
I am currently working on running a structural equation modelling analysis with a dataset and I am running into a few problems. Before running the full sem, I intended to run a CFA to replicate the psychometric testing done with this measure I am using. This measure has 24 items, which make up 5 subscales (latent variables), which in turn load onto an "total" higher order factor. In the literature they describe that "In all models, the items were constrained to load on one factor only, error terms were not allowed to correlate, and the variance of the factors was fixed to 1".
I've constraint items to load onto one factor, and set the variance of those factors to 1, but I am having trouble specifying in my model that the error terms are not allowed to correlate. Do they mean the error term of the items are not allowed to correlate? Is there an easy way to do this in lavaan or do I have to literally go "y1~~ 0y2","y1~~0y3".. and so on for every item?
Thank you in advance for the help.
...ANSWER
Answered 2021-Mar-08 at 14:16By default the error terms do not correlate, the authors intended to mention that they did not use that kind of modification indices. It is usual to correlate items' residuals inside the same factor. Here is an example of a hierarchical model with three first-order factors, with factors variance fixed to one, and with no error terms correlated:
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