[IPAC-List] Rescaling exam scores

[Dennis Doverspike]

Steven,

I an unclear why the distribution of scores would make much of a difference
or why you would think standardization would make that much of a
difference.  Unless you use normalized z scores, standardization is an
interval rescaling, and thus would do very little to change the underlying
distribution.

Now, standardizing and then converting to say a mean of 70 and SD of 10,
would mean the weight assigned to veteran's preference would be pretty
consistent over test administrations.  However, if your raw scores already
use a cutoff of 70 and a maximum score of 100, then I would not think that
standardizing scores would make that much of a difference in the equality
of weights across test administrations.

So maybe I misunderstand what you are doing or trying to accomplish.

Standardization can be easily accomplished using most statistical packages
or excel, and it does have some benefits. But I am not sure that it will
achieve what you want it to accomplish in terms of the weights allocated to
veteran's status.

Dennis

On Mon, Oct 5, 2015 at 5:07 PM, Partain, Steven C. <Steven.Partain at tvfr.com>
wrote:

> Our agency has recognized the variation of impact of veterans’ preference
> (for our state: 5 points for veterans and 10 points for disabled veterans)
> on civil service exams depending on the distribution of scores.  I’m toying
> with the idea of rescaling all exam scores to standardize distributions and
> thus standardize the impact of preference.  My statistical background,
> unfortunately, is a few decades stale.
>
>
>
> Does anyone have experience with this sort of rescaling?  I’ll eventually
> figure it out with my google research, but thought maybe one of you does
> this routinely and has a suggested method/formula.
>
>
>
> I’m also interested in any feedback on the concept as it relates to
> preference.
>
>
>
> Thanks,
>
>
>
> *____________________________________________________*
>
> *Steven Partain | HR Manager*
>
> Tualatin Valley Fire & Rescue
>
> Direct: 503-259-1292
>
> www.tvfr.com
>
>
>
> _______________________________________________________
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>


-- 
Dennis Doverspike, PhD., ABPP
Licensed Psychologist, #3539 (OHIO)
Independent Consultant
Professor of Psychology, University of Akron
dennisdoverspike at gmail.com

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