similar to: DIF Analysis starting from a gpcm class object

Hi All, ? I am trying to use the lordif package in R and can't figure out the reason for the above error when I try to run the calctheta() function. ################## # read data using foreign package - must be Stata 11 or earlier racedata<- read.dta("race.dta")??? # item responses resp.data<-racedata[,-c(1:2)] # grouping variable is in the second column

Hi all I am not an experienced user of R. I am trying to perform DIF analysis using Lordif and I get the follow error: > GroupDIF <- lordif(resp.data=Resp, group=Group, criterion="R2", pseudo.R2="McFadden", R2.change=0.02) Iteration: 500, Log-Lik: -137340.437, Max-Change: 0.00119 EM cycles terminated after 500 iterations. (mirt) | Iteration: 1, 14 items flagged for DIF

Dear All, does anybody know of a package (working under Linux) for multilevel IRT modelling? I'd love to do this without having to go on WINSTEPS or the like.. thanks for the attention! Federico Andreis ----- Dr. Federico Andreis Universit? degli Studi di Milano-Bicocca, PhD Student MEB Department, Karolinska Institutet, Stockholm, Visiting PhD Student -- View this message in context:

Dear all, I have the following problem: I have been using the routine "optim" in order to maximize a joint likelihood (basically a mixture with modeled weights) with quantitative variables..so far so good. Now I need to plug into the model a categorical variable (namely, age classes). Obviously, given the way optim works, it won't allow me to treat it "directly" (i.e.

Dear R-users, I'd like to announce the release of the new version of package 'ltm' (i.e., ltm_0.9-0 soon available from CRAN) for Item Response Theory analyses. This package provides a flexible framework for analyzing dichotomous and polytomous data under various IRT models. Furthermore, supporting functions for descriptive statistics, goodness-of-fit, ability estimation and

Dear R-users, I'd like to announce the release of the new version of package 'ltm' (i.e., ltm_0.9-0 soon available from CRAN) for Item Response Theory analyses. This package provides a flexible framework for analyzing dichotomous and polytomous data under various IRT models. Furthermore, supporting functions for descriptive statistics, goodness-of-fit, ability estimation and

In the near future I will release MiscPsycho, a package that contains various functions useful for applied psychometricians. I would like to include some data sets for distribution in the package, but have not created any of these on my own, but have used data distributed in other packages such as the LSAT data in the ltm package. Is it appropriate for me to distribute a data set in the package I

CRAN (and crantastic) updates this week New packages ------------ * bdoc (1.0) Michael Anderson http://crantastic.org/packages/bdoc This package contains a function that will classify DNA barcodes as well as a few test and reference data sets. * bdsmatrix (1.0) Terry Therneau http://crantastic.org/packages/bdsmatrix This is a special case of sparse matrices, used by coxme and

Hi, I created the model below, which returns me the following warning message: In sem.default(ram = ram, S = S, N = N, param.names = pars, var.names = vars, : Could not compute QR decomposition of Hessian. Optimization probably did not converge. ######### Model ######## mDPDF = data.frame(mj1,mj2,mj3,mj4,mj5,eL1,eL2,eL3,eL4,eL5,aC1,aC2,aC3,aC4,disR1,disR2,disR3,disR4,disR5,

Hi, In Solairs Dtrace User Guide, page 193, it lists the arguments of ERROR probe. One of these arguments is arg3, it is explained as "The DIF offset into that action or -1 if not applicable". Then what does the abbr. DIF mean? Regards TJ

07.12.2023 22:22, David Bean via samba ?????: > I have a semi working 32-bit build of Samba 4.11.0 for Windows based on a patched Cygwin 2.5.2 build. I wondered if anyone knows where a set of DIF files to move it from release 4.11.0 to the latest stable release of 4.19.x (or through each intervening release to that point) could be obtained. I would like to apply changes incrementally to this

I have a semi working 32-bit build of Samba 4.11.0 for Windows based on a patched Cygwin 2.5.2 build. I wondered if anyone knows where a set of DIF files to move it from release 4.11.0 to the latest stable release of 4.19.x (or through each intervening release to that point) could be obtained. I would like to apply changes incrementally to this build to avoid breaking the current work I have in

I have the following item response theory (IRT) likelihood that I want to maximize w.r.t. to theta (student ability). L(\theta) = \prod(p(x)) Where p(x) is the 3-parameter logistic model when items are scored dichotomously (x_{ij} = 0 or 1) and p(x) is Muraki's generalized partial credit model when items are scored polytomously (x_{ij} = 0 \ldots J). Now, I wrote the following two functions

I need a bigger DIF. Please advise. rick -- Rickey C. Weisner Software Development and Performance Specialist Sun Microsystems, INC cell phone: 615-308-1147 email: rick.weisner at sun.com

The function factor.scores is used with package ltm and others to estimate IRT type scores for various models. It inherits objects of class grm, gpcm and a few others. What I would like to do is to use the factor.scores function, but feed it my own item parameters (from a bifactor model where the 2PL parameters are adjusted for the bifactor structure). Does anybody have an idea of how this might

Hello, I'm new user of asterisk. Can anybody pls tell me how to use asterisk or any detail how to link???? i installed Asterisk-0.4.0 on i810 onboard sound card with Redhat 7.1. when i type "asterisk -vvvc" i get *CLI> prompt Prakash Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com Buy The Best In BOOKS at

Hello Please advice how can i configure a sip phone that is not on my local network. ie i have Xlite far some where in America and my Asterisk server is at Sahara desert . Now how can i make a call to that sip phone? Please advice what keywords to carry on?? -- Best Regards Shakeel Abbas -------------- next part -------------- An HTML attachment was scrubbed... URL:

On Tue, Jun 30, 2015 at 04:49:13PM +0200, Luigi Toscano wrote: > On Tuesday 30 of June 2015 15:22:27 Richard W.M. Jones wrote: > > It has been a ludicrously long time (over 8 months) since the last > > stable release of libguestfs. So I'd like to plan a new 1.30 release > > soon. > > > > Please follow-up if there are features / blockers / bugs that need to

Hi there. I bought a generic UPS from a local (South African) hardware company, Sahara. They call it an "Electra 1000 Plus". From what I am told it is a 1000 VA line interactive UPS. It comes with "WinPower" Java based software that I couldn't get to work. (Crashes on start-up, without any explanation.) I would like to know if any one on this mailing list could help me

I've been building, checking, and installing a package all day today with no errors. I have even been able to bring the package into R on my machine and use it all day doing test runs. However, now, when I run Rcmd check, I get errors. Keep in mind not one thing has changed. I haven't touched any of the functions or .Rd files, yet I get the error below at this point and the package cannot