Scoring formula

[Grow Pattern]

Derek,
            The point of the original post was the parallelism of the 
full-size world to ours, not  " To TBL or TBLP." as Shakespeare would have 
miss-quoted  :-)

Regards,

Eric.


----- Original Message ----- 
From: "Derek Koopowitz" <derekkoopowitz at earthlink.net>
To: <discussion at nsrca.org>
Sent: Friday, July 29, 2005 10:30 PM
Subject: RE: Scoring formula


> There is a big difference between TBLP and TBL.  TBL does not change
> individual maneuver scores at all - it may change the overall round score
> for a judge based on how that judge has scored other pilots and relative 
> to
> that judges' scores compared to the other judges.
>
> I have given explanations of what TBL is several times - certain people 
> are
> set in their ways and will not open up their minds to understanding
> statistical methods.  I can equate TBL vs high-low throw out to people's
> understanding of the impact on turnaround in pattern.
>
> The problem with high-low discard is that you are eliminating the work of
> 40% of your judges scores if 5 judges are used.  Is that fair to the 
> judges
> and pilots?  TBL changes that by keeping about 90% of all judges scores.
>
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] 
> On
> Behalf Of Grow Pattern
> Sent: Friday, July 29, 2005 6:13 PM
> To: discussion at nsrca.org
> Subject: Re: Scoring formula
>
> Check this out I was researching TBL formulae and I ran across this. The
> parallelisms of the full-size aerobatic world to our world are pretty 
> scary.
>
> _ Eric
>
>
> Horizon - January Issue 2005 page 8
>  "Hello IAC members, I've just been informed that TBLP has officially been
> abandoned by the IAC. I suspect that most of you were not aware of this."
> posted by Don
> Peterson to the Exploder.
>
> However, it appears that the system itself is problematic in regards to
> averaging
> scores and pilot placement.
>
> 'TBLP is very simple:
> 1. it "stretches" or "narrows" each judge so it looks like he scored the
> same "style" as
> everyone
>
> 2. it looks at every individual figure and removes a biased judge
>
> 3. it looks at every full flight and removes a biased judge,' wrote 
> Michael
> Golan on the
> Exploder. Anyone wishing to verify this analogy can read Appendix 2 of the
> IAC Official Contest
> Rules book and get the official description of what TBLP does to scoring.
> However, Michael went on to show the two big problems with TBLP;
>
> 1. with 3 judges and 3 competitors, I've seen the best pilot come out on 
> the
>
> bottom and vice versa.
>
> 2. TBLP does not allow for real time results. There were many e-mails in
> this vein and examples of where great flights seem to fall into
> a lower ranking under lesser flights. Many gnashing of teeth, shrugging of
> shoulders and shaking of heads followed.
>
> The best definitive response came from Allyson Parker-Lauck, IAC Vice
> President.
> She verified that the TBLP system is not being used in the contest season
> 2005 and that an averaging system will be used.
>
> 'I'm not going to get into the pro-con TBLP debate, but I would like to
> answer as to why the Board changed the scoring program for the 2005 
> season.
> We haven't "abandoned" TBLP, and we didn't decide TBLP must be bad because
> we don't understand it as some have asserted. There's always more to the
> story, so as an IAC Officer who was actually at the meeting where the
> decision was made, I'd like to tell you what happened from my point of 
> view.
> 1 - IAC Contest Directors have been screaming for years for a Windows 
> based
> scoring
> program that is easy to use. Finding an IAC Scoring Director with the
> equipment necessary to perform his/her duties is becoming more and more
> difficult every year.IAC has been wanting a program that runs in Windows 
> for
>
> at least 8
> years. This year we finally had a committee who has come through for us 
> with
>
> an easy to use, tested product.
>
> 2. - The committee who developed this program could not perform the
> programming, testing, etc. to make sure the bugs were worked out AND
> incorporate TBLP in time for the 2005 Contest Season.
>
> 3 - Several Contest Directors around the country ran dual results - the
> official results with TBLP along side unofficial straight average results.
> Some of the differences at some contests were quite eye opening (at one
> contest TBLP brought a competitor from 6th to 2nd place). Some say this
> shows TBLP is working as intended, others say that's out of whack.
>
> 4 - IAC Director and CIVA President Mike Heuer then informed the Board 
> that
> CIVA will be conducting such a study and will share the information with 
> the
>
> IAC.
>
> 5 - IAC will be revisiting the TBLP issue at our next two meetings to 
> decide
>
> what to do about our scoring program for 2006. By that time we won't be
> running on opinion and personal preference, we'll have good solid data 
> from
> both the new scoring program which will use straight averages along with 
> the
>
> CIVA study on TBLP. We're trying to answer to the Membership's needs and
> make improvements to our service." Allyson Parker-Lauck ended.
>
> So, one final thought about the scoring in 2005. If you are planning on
> being a volunteer, one of the best places you can be is in the scoring 
> room!
>
> It's THE hot spot - that's where the action will be!
>
>
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