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Messages - hartmann

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General Discussion / Mac version
« on: November 12, 2013, 04:32:04 PM »
I'm wondering when the Mac version of ConQuest will be released. It is announced on the product website for a while now.

Actually I'd prefer a Linux version over Mac and Windows, but Mac will do, too. ;)


as far as I know, all ConQuest versions will provide identical output if you specify certain parameters in the input syntax (parameter change, no. of iterations, no. of nodes, node range …). It seems to me that the standard values for some of these have changed with newer program versions. (Please correct me if I'm wrong here.)


Questions and Answers / Re: EAP's and PV's
« on: November 12, 2013, 08:13:20 AM »
3. How are PV's different from WLE, MLE, and EAP?
4. When do we used PV's?

In a nutshell, all person parameters (WLE, MLE, EAP, PV) provide good estimates of population means. However, WLEs and MLEs overestimate variance, while EAPs underestimate variance. PVs provide a rather accurate estimate to population variance and should be used for analysises of population parameters.

But: PVs are random draws from the posterior distribution and therefore not appropriate as individual ability estimates. For an estimation of individual scores, use MLEs or WLEs.

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