Hi All,
I am new to ACE model estimation so I am trying to follow some tutorials I found online (script attached).
The results seems fine, and are also coherent with another script I used. However, I got negative lower CI: ACEvc.VarC[1,4] -0.2443061 0.23255753 0.7557620.
Does this make sense to you? As far as I know when CI include 0 we cannot conclude that the value is different from 0...
I would really appreciate whether someone could help me with this.
Thank you in advance!
Best,
Valentina
Summary of ACEvc free parameters: name matrix row col Estimate Std.Error A 1 interC intercept 1 1 12.9836360 1.61658419 2 betaS bS 1 1 -0.2424204 0.96901765 3 betaA bA 1 1 -0.1057470 0.02198311 4 VA11 VA 1 1 9.4010395 10.84553399 5 VC11 VC 1 1 2.9562094 9.78221159 6 VE11 VE 1 1 28.0673269 2.82575907 confidence intervals: lbound estimate ubound note ACEvc.VarC[1,1] NA 9.40103948 NA !!! ACEvc.VarC[1,2] NA 2.95620939 NA !!! ACEvc.VarC[1,3] NA 28.06732694 NA !!! ACEvc.VarC[1,4] -0.2443061 0.23255753 0.7557620 ACEvc.VarC[1,5] -0.4037859 0.07312901 0.4885879 ACEvc.VarC[1,6] 0.5736126 0.69431346 0.8287777 To investigate missing CIs, run summary() again, with verbose=T, to see CI details. Model Statistics: | Parameters | Degrees of Freedom | Fit (-2lnL units) Model: 6 518 3404.776 Saturated: NA NA NA Independence: NA NA NA Number of observations/statistics: 262/524 Information Criteria: | df Penalty | Parameters Penalty | Sample-Size Adjusted AIC: 2368.7757 3416.776 3417.105 BIC: 520.3732 3438.186 3419.163 CFI: NA TLI: 1 (also known as NNFI) RMSEA: 0 [95% CI (NA, NA)] Prob(RMSEA <= 0.05): NA To get additional fit indices, see help(mxRefModels) timestamp: 2020-06-18 11:22:32 Wall clock time: 0.559001 secs optimizer: NPSOL OpenMx version number: 2.17.2