Can I simulate data with factor loadings only?

[Seongho Bae]

Hi all,

Can I simulate data with factor loadings only?

In the current, simdata() does not care about the 'd1 parameter' is NA, but I can not have confidence that is safe.

Best,

Seongho

[Phil Chalmers]

No, you need to have intercept terms in IRT models. While in factor analysis models with continuous data this is generally irrelevant, estimation of categorical models need some type of threshold parameter to control the observed proportions. 

Phil

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[Seongho Bae]

Thanks for your clarification. I guessed that is inappropriate a long time ago, but now I got clear understand your explanation.

Best,

Seongho

2017년 11월 7일 화요일 오전 3시 39분 38초 UTC+9, Phil Chalmers 님의 말:

No, you need to have intercept terms in IRT models. While in factor analysis models with continuous data this is generally irrelevant, estimation of categorical models need some type of threshold parameter to control the observed proportions. 

Phil

On Mon, Nov 6, 2017 at 12:06 AM, Seongho Bae <seongh...@gmail.com> wrote:

Hi all,

Can I simulate data with factor loadings only?

In the current, simdata() does not care about the 'd1 parameter' is NA, but I can not have confidence that is safe.

Best,

Seongho

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To unsubscribe from this group and stop receiving emails from it, send an email to mirt-package...@googlegroups.com.