amos and lavaan: difference in chi square

[GS Ashiabi]

i ran a model in AMOS and re-run the same model in lavaan, but getting different dfs. In AMOS I get df = 108, and in lavaan, I get df = 111.

Just trying to figure out what three other parameters are being estimated in AMOS that are not being done in lavaan. any help is appreciated

attached is a graphical representation of the model estimated in AMOS (without the observed variables), which will be indicated in the lavaan code below:

AMOS Summary

summary of the AMOS output is below (focusing on variables and model fit - default model)

number of variables in your model	54
number of observed variables	17
number of unobserved variables	37
number of exogenous variables	27
number of endogenous variables	27
MODEL	npar	CMIN	df	p
default model	62	2135.78	108	0.000

lavaan Code

#specifying the model

model <- '

#measurement (latent factor ) model

TC =~ CO + TR 

E =~ EM

GD =~ GR

TMS =~ EN + CON

C =~ COM1 + COM2

S =~ SA

PWE =~ EN + SU

TWM =~ TR1 + TR + TM

JS =~ RE

EC =~ RE1 + RE2

#structural model (regressions)

#direct effects

E ~ a1*TC

GD ~ a2*E

JS ~ a3*GD

C ~ b1*TMS    

PWE ~ b2*C    

TWM ~ b3*PWE  

JS ~ b4*TWM

PWE ~ c1*S  

EC ~ d1*JS

'

#fitting the sem

fit <- sem(model, 

           data = ltestR, warn = TRUE, meanstructure = TRUE, 

           mimic = "EQS", estimator = "ML")

lavaan goodness of fit

  Estimator                                         ML

  Model Fit Test Statistic                    3312.865

  Degrees of freedom                               111

  P-value (Chi-square)                           0.000

[Edward Rigdon]

By my count, the lavaan DF = 111 is correct, adjusting for the single indicators and the covariances among the three predictor factors S, TMS and TC. I can't tell from your message what model Amos actually estimated, but there is nothing unusual in teh lavaan DF calculation, and no strange defaults being invoked.

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[car...@web.de]

I get df = 111 with Amos. Maybe you forgot to fix 3 of the 4 error terms?

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[car...@web.de]

... of the single indicator measures to be precise 🤐
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Diese Nachricht wurde von meinem Android Mobiltelefon mit WEB.DE Mail gesendet.

Am 10.05.19, 08:48, "car...@web.de" <car...@web.de> schrieb:

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