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La Lioness Priyanka Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 01:46 PM
Original message
Poll question: Item Response Theory
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Odin2005 Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 02:58 PM
Response to Original message
1. LOL, WUT?
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Kali Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 06:11 PM
Response to Original message
2. went with tedious
as the google gave me this preliminary bit for wikipedia:

"In psychometrics, item response theory (IRT) also known as latent trait theory, strong true score theory, or modern mental test theory, is a paradigm for the design ...
Overview - The item response function - IRT models - Analysis of model fit"

but throw in a touch of WTF? or rather just a desire for a brief explanation because I have a natural curiosity and am clueless as to what Item Response Theory is.
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MiddleFingerMom Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 06:20 PM
Response to Reply #2
3. I Googled it, too... and it looks like post-grad material that needs far too much...
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Plus, you know... it's math stuff.
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Which, at least while driving... is MUCH more dangerous than texting or applying makeup.
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Kali Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 06:47 PM
Response to Reply #3
4. one of the things I really like about the watershed group I participate with
is the ability of our executive director to get academics to come give presentations to us rubes. It is so good for both groups to be exposed to and forced to communicate.

The scientists need to realize that a lot of their work has real ramifications for every-day human beings and in turn the locals need to be taught the science behind the work that goes into some of the decisions that get made.

Mary is very good at setting up these meetings and guiding them along so that it stays interesting for everybody. It eliminates some of the paranoia, intentional ignorance and reverse intellectualism that is so prevalent these days AND cuts off the isolation and arrogance that academics can develop for regular people.

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MiddleFingerMom Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 07:05 PM
Response to Reply #4
5. I worked for a while as an environmental lobbyist in D.C. and one of the BEST parts of my job...
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... involved working directly with Chesapeake Bay Watermen (fishermen, oyster harvesters, etc).
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MANY of these guys had dropped out of school to work on Dad's boat -- sometimes out of
GRADE school -- yet they were some of the most erudite, well-spoken individuals when it
came to their particular field of interest that I've ever known.
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It was a pleasure to work with regular guys who had no antipathy nor contempt for the
more didactically intense areas of their occupation.
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Wish I could say I found a corresponding attitude about the "unwashed masses" from way
too large a percentage of the "intelligentia".
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Not a great percentage -- but still way too large.
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Deep13 Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 08:12 PM
Response to Reply #3
6. 45 nt
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MiddleFingerMom Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 08:20 PM
Response to Reply #6
8. SURE, you solved the equation... but you just rear-ended the Prius in front of you, Einstein!!! n/t
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Deep13 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 03:09 PM
Response to Reply #8
13. Damn.
I pulled over to do the math, but I guess I did not see the Prius driver did the same thing.
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Chan790 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 07:57 AM
Response to Reply #3
11. 45.
2x=(360/4)
2x=(90)
x=45

That's not hard...I did it reflexively in my head automatically. I might not be able to grasp calculus but I can do the hell out of pre-algebra. I can do it while driving...if I drove.
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rurallib Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 08:53 AM
Response to Reply #3
12. do those come in rebus type puzzles also?
I hate rebus puzzles.
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La Lioness Priyanka Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 12:21 AM
Response to Reply #2
10. items response theory is a test theory
that models how much latent trait a person has, and the probability they have of picking a particular response

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Tuesday Afternoon Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 03:18 PM
Response to Reply #10
14. but, as opposed to classical . . .
is it any better?

seems both would have their usefulness,

while one may be more tedious than the other.
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La Lioness Priyanka Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 05:20 PM
Response to Reply #14
15. yes. person parameters and item parameters are invariant in IRT
which gives it a lot of advantage over classical test theory
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Tuesday Afternoon Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-13-11 05:47 PM
Response to Reply #15
16. ok. that tells me how to vote. thanks.
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Deep13 Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 08:13 PM
Response to Original message
7. I got nothing. Sorry. nt
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frogmarch Donating Member (1000+ posts) Send PM | Profile | Ignore Sat Nov-12-11 08:22 PM
Response to Original message
9. I thought you meant
buyer feedback. I like giving buyer feedback.
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