[IPAC-List] Michael McDaniel's Reference to the so-called Validity-Diversity Dilemma
Winfred Arthur, Jr.
w-arthur at tamu.edu
Fri Jun 3 11:46:02 EDT 2016
we tend to use very general time limits too on our knowledge and similar
tests. but it has *not* been under the premise or expectation that it
will reduce subgroup differences but instead (besides the usual
administrative constraints) there has been little reason to justify a
time pressure. hence, Mike's results are aligned w/ what i would expect.
- winfred
On 6/3/2016 10:32 AM, Aamodt, Mike wrote:
> Pat,
>
> Interesting question. Based on some limited research done by our
> students, I would guess that there would be little difference. I base
> this thought on two of their findings:
>
> One study of 216 students taking PSY 121 exams showed a minimal
> difference (d = .06) in test taking times between whites and minorities.
>
> A meta-analysis conducted in a summer research class showed that
> across 13 studies (n = 14,557), the score difference between timed
> and untimed tests was minimal (d = -.10)
>
> If these results can be generalized, which is a big IF, it seems that
> adding a time limit doesn't make a huge difference in test scores and
> there isn't much of a difference in how much time minorities and
> whites take to finish tests. Of course, the length of the time limit
> itself and the number and types of items could make a difference.
>
> Sounds like a great research project for a student looking for a SIOP
> presentation :)
>
> _________________________________________
> Michael G. Aamodt, Ph.D. (Mike)
> Professor Emeritus
> Department of Psychology
> Radford University
> Radford, VA 24142-6946
> (202) 280-2172
> maamodt at radford.edu <mailto:maamodt at radford.edu>
> ------------------------------------------------------------------------
> *From:* IPAC-List [ipac-list-bounces at ipacweb.org] on behalf of Patrick
> McCoy [Patrick.McCoy at cfp-psc.gc.ca]
> *Sent:* Friday, June 03, 2016 10:09 AM
> *To:* List, IPAC; Putka, Dan
> *Subject:* Re: [IPAC-List] Michael McDaniel's Reference to the
> so-called Validity-Diversity Dilemma
>
> Interesting discussion!
> A question, if I might. Has anyone seen convincing research that
> differences in group test performance are reduced when a test has
> minimal time press (i.e., when the time to do the test is generous).
> That assumption is often made, but is it warranted?
> Pat McCoy
> Ottawa, Canada
>
> >>> Dan Putka <dputka at humrro.org> 2016/06/03 9:04 AM >>>
> Hi Richard,
>
> I think decisions regarding this matter will vary from organizations,
> and hinge on what they value and the resources they can offer to deal
> with potential inefficiencies in their selection process.
>
> For example, let’s say an organization in question places high value
> on diversity. The organization may be willing to sacrifice some level
> of criterion-related validity with their selection measure if it
> results in bringing a more diverse workforce in the door. A critic
> may rightly argue that using a test with lower criterion-related
> validity would lower the expected mean performance of individuals
> hired. While that would be true, the organization could potentially
> offset the loss of validity through more rigorous training and
> performance management (i.e., a post selection intervention designed
> to ensure a greater proportion of the workforce meet performance
> standards). Of course adding that rigor may require more investment on
> the part of the organization, which they may or may not see as worth it.
>
> The other thing to consider here is the magnitude of the difference.
> For example, using Mike’s quote as an example, if increasing the time
> limit of the test has only a small negative impact on validity, but
> makes a more sizable reduction in subgroup differences, then it would
> arguably be harder to justify not sacrificing validity in that case.
> In that situation, one might construe the situation as the
> organization having a reasonable alternative to their assumed current
> approach (i.e., the reduced time limit) that has minimal impact on
> validity, but is better from a subgroup difference perspective. Of
> course, a challenge in practice is drawing the line between how much
> of a drop in validity is too much, and how much of a drop in subgroup
> differences is enough to warrant deviating from the “maximize
> validity” philosophy. Though statistical inference can help here
> (e.g., non-sig. change in validity, sig. change in subgroup diffs), I
> think this is a judgment that will also vary from organization to
> organization.
>
> Personally, I think one of our key roles as scientist-practitioners in
> the selection arena is to help the organizations we work with
> understand the implications of potential decisions they make regarding
> their selection processes. We can do our best to explain potential
> options and likely outcomes based on data, theory, literature, past
> precedent, experience, and offer a reasoned, logical opinion, but the
> final decision may often not rest in our hands.
>
> Dan
>
> *Dan J. Putka, Ph.D.*
> Principal Staff Scientist
> Office: 703.706.5640
> dputka at humrro.org | www.linkedin.com/in/dputka
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>
>
> 66 Canal Center Plaza, Suite 700
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>
>
>
>
> From: "Richard Joines" <mpscorp at value.net>
> To: "IPAC List" <ipac-list at ipacweb.org>
> Date: 06/02/2016 08:15 PM
> Subject: [IPAC-List] Michael McDaniel's Reference to the so-called
> Validity-Diversity Dilemma
> Sent by: "IPAC-List" <ipac-list-bounces at ipacweb.org>
> ------------------------------------------------------------------------
>
>
>
> Mike,
>
> You make the statement that "if job-related reading speed has
> undesirable consequences such as group differences, one may wish to
> sacrifice merit hiring for diversity hiring and increase the time
> limit of the exam."
>
> I guess the question for those who think I/O Psychology is a science
> is... how does one reach the decision to throw the science out and go
> another route? If the result is lowering validity, I'm certainly not
> about to increase the time limit of any of my empirically validated
> tests. There would be no scientific basis for doing that.
>
> I would be interested in what people think about this and how they
> view their role and what limitations they think they should observe,
> but my view has always been to try to maximize validity while ensuring
> compliance with federal guidelines. Since the 1978 Uniform Guidelines
> we've been compelled to look for alternative selection methods, the
> idea being that if we can find or develop a test that has the same or
> higher validity but lower adverse impact, we should do that.
>
> *However*, the idea that we should sacrifice validity in order to
> increase diversity strikes me as going too far. Who are we to make
> such decisions? We're supposed to be scientists, not social
> engineers, yes?
>
> Thoughts anyone?
>
> Rich Joines
> Mgt & Personnel Systems, Inc.
> _www.mps-corp.com_
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>
> 925-932-0203
>
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