GRM power analysis?
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AM
Mar 2, 2018, 1:16:48 AM3/2/18
to mirt-package
Hi!
I was wondering if there's a way to conduct power analysis for testing differences of graded response model parameters among groups to obtain an estimate of required sample size?
My study will have two independent variables, each with two levels - so, there are 4 groups - and I want to test how being in each of those 4 groups will affect GRM parameters.
I was wondering if there's a way to conduct power analysis for testing differences of graded response model parameters among groups to obtain an estimate of required sample size?
My study will have two independent variables, each with two levels - so, there are 4 groups - and I want to test how being in each of those 4 groups will affect GRM parameters.
Phil Chalmers
Mar 2, 2018, 8:59:51 AM3/2/18
to AM, mirt-package
Monte Carlo simulation is likely your best bet; I don't think there is a closed-form solution to do this. Sorry.
Phil
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