Re: POSTHOC and ETA values disagree

From: "Leonid Gibiansky" leonidg@metrumrg.com Subject: Re: [NMusers] POSTHOC and ETA values disagree Date: Wed, June 29, 2005 3:00 pm Doug, You mix terminology and it makes the text hard to follow. THETAs are population parameters. By definitions, they are the same for all individuals; POSTHOC does not change them. You probably refer to population parameters that correspond to those THETAs. Initial values are given to OMEGA matrix, not to ETAs. If the individual fit is fine, you may not need random effect ETA(4). Try using only fixed effect (POTR=THETA(4)) and see what happens. In general, it is not necessary to have random effects on all parameters. Most likely, you may also remove ETA(5) without compromising the fit. After you remove unnecessary random effects, you may try FOCE (starting from the final FO parameter estimates) Good luck, Leonid