[R] Bifactor model and infit statistics?

Goodafternoon, I amcurrently in the process of calibrating an item bank using a GPCM model. So, amI right to assume that the bifactor model allows me to work with my generalfactor by assimilating it to a one-factor model, without taking into account groupfactors? That is, I can estimate my

[R] Linear regression with tranformed dependant variable

Dear all, I am trying to fit a multiple linear regression model with a transformed dependant variable (the normality assumption was not verified...).  I have realised a sqrt(variable) transformation... The results are great, but I don't know how to interprete the beta coefficients... Is it

[R] svyciprop object

Hi, I'd like to access to the different elements in a svyciprop object (to the confidence intervals in particular...). But none of the functions I know works.Thank you for your help ! > grr <- svyciprop(~temp==bzz, dclus1)> grr                               2.5%   > 97.5%temp == bzz 0.040719697