I am trying to test measurement invariance for a scale with 20 items loading 4 latent variables (no cross-loadings) and 4 error correlations. However, while fitting a target model there are endless iterations and no results. Any advice on why this is happening and how to solve it? Thanks in advance!
Here is the command I used:
sem (Meta_CQ -> cqs1 cqs2 cqs3 cqs4) (Cog_CQ -> cqs5 cqs6 cqs7 cqs8 cqs9 cqs10) (Mot_CQ -> cqs11 cqs12 cqs13 cqs14 cqs15) (Bih_CQ -> cqs16 cqs17 cqs18 cqs19 cqs20), covstruct(_lexogenous, diagonal) latent(Meta_CQ Cog_CQ Mot_CQ Bih_CQ ) cov( e.cqs1*e.cqs3 Cog_CQ*Meta_CQ Mot_CQ*Meta_CQ Mot_CQ*Cog_CQ e.cqs11*e.cqs12 Bih_CQ*Meta_CQ Bih_CQ*Cog_CQ Bih_CQ*Mot_CQ e.cqs19*e.cqs20) nocapslatent ginvariant(mcoef) group(grupa)