TBLP

[Bill Glaze]

Well , you were the one who mentioned TBLP in the first place, 
(incorrectly, in my opinion) not me.  And, I recall somewhere in the not 
too distant past, you were involved in a discussion of  the possibility 
of using TBLP at Muncie.  (Whether you were in favor or against, I don't 
recollect.)
If you care to read the book describing TBLP, you will see that it is a 
far more rigorous exercise than just a high/low discarding of scores.  
In fact, it takes up 2-1/2 pages of formulas and descriptions.
As far as throwing out the high and low judges, (as we presently do) the 
IAC Rule Book says, (and I quote) "Excluding the highest and lowest 
judges does not remove the second or third out-of-range or biased 
judges, and often does remove judges who are the most rigorous with 
their scores."  Ibid P. 141
Read the book.  It's interesting.

Bill Glaze


Derek Koopowitz wrote:

>F3A uses TBL not TBLP - a subtle difference.  As an aside to this... If what
>you wrote below is the case then in everyday Nats competition the judges are
>being judged as well - we discard high/low scores.  What's the difference?
>
>One other point - TBL (or TBLP) is NOT used in any AMA pattern event (to my
>knowledge) so this point is moot. 
>
>-----Original Message-----
>From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
>Behalf Of Bill Glaze
>Sent: Monday, December 13, 2004 2:57 PM
>To: Discussion
>Subject: TBLP
>
>A statement was made in this discussion group,  about the TBLP system not
>being for ranking judges, but for scoring pilots.  I believe this statement
>to be in error.
>Either that, or I have misunderstood the meaning of the statement.
>In actuality, it (Tarasov-Bauer-Long-Penteado) is used to determine which
>judges may or may not fall outside a "window" of scoring.  It is used to
>identify, in any given contest, those judges who are outside the "norm."  It
>is explicitly stated* that "In case you judges are concerned this process
>corrupts your rankings, when the scores are normalized in this manner to
>remove stylistic differences between judges, THE RELATIVE STANDING OF EACH
>PILOT IS NOT AFFECTED."  (sic)(Caps mine)  It further states that "in world
>championships where ten (10) judges are used, it is not uncommon to see
>three (3) or even four (4) judges deleted from a pilot's flight scores."  I
>believe that these statements indicate that the judges are, in fact, the
>ones being judged.
>It is a fairly rigorous mathematical exercise and points out those judges
>who may not be scoring contestants in a manner consistent with good judging
>practices.
>This book makes very interesting reading.  Underlying it all is that even
>with the full size aircraft, and  world class competitors, in a sport many
>years old, the participants and executives are still even now concerned with
>judging.  And wisely so.
>
>*International Aerobatic Club Official Contest Rules (Red Book) appendix II,
>P. 141-147 As modified 1999
>
>Bill Glaze
>
>
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