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发表于 2012-8-14 00:55
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其实比饶毅更牛的回复是 Upenn 的 LAI JIANG! z8 f* R* M/ S/ q j
如果是中国长大的,英语能到这种程度真是很不简单。
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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* _4 ^4 j8 T vFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
' p( z7 M4 F, `( J( G. Z! `, regard as one of the most prestigious and influential physical-science
: _7 D5 k( X$ p# \% w% Kmagazines — publish a thinly veiled biased article like this. Granted, this
) L/ M/ s! z i1 J, \is not a peer-reviewed scientific article and did not go through the, [( S+ C/ m5 }
scrutiny of picking referees. But to serve as a channel for the general) N# _% }/ `& z
populace to be in touch with and appreciate science, the authors and editors' D2 \4 B- v) b# Z' a
should at least present the readers with facts within the proper context,; h/ u) j& E }3 @# ?: O
which they blatantly failed to do.
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4 z$ |9 O- L2 {$ w, @1 J1 e- {6 H! D7 pFirst, to identify Ye’s performance increase, Ewen Callaway compared her0 v/ k$ c: k7 f( B
Olympic 400-metre IM time with her performance at the World Championships in
4 i# V. Z' O" V Q/ a2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
/ B) v) K% a% z0 S4 Y+ fanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
( {5 U: `' c1 D- o: Qpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an! t$ t5 k8 o: u! r# V7 ~% }
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the6 O- p$ u& Q4 w2 S
difference between the gold and silver medal, I see no reason for 5.38 s to
3 @+ F' R/ q( u" W0 T; r7 H0 Fbe treated as 7 s.
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5 L3 n7 d- S* T8 i- s( y6 jSecond, as previously pointed out, Ye is only 16 years old and her body is7 h% K1 w/ I. `* \. a3 O
still developing. Bettering oneself by 5 seconds over two years may seem8 K+ [0 M, n/ t4 n: }
impossible for an adult swimmer, but it certainly happens among youngsters. e; n! \, }7 ^" M7 z# z4 r
An interview with Australian gold medallist Ian Thorpe revealed that his 400
$ k+ g% M+ s8 Y3 _-metre freestyle time improved by 5 seconds between the ages of 15 and 16.4 z: s. z- d4 L
For regular people, including Callaway, it may be hard to imagine what an
) {0 c6 }5 j/ Y& o8 y: Z$ Oelite swimmer can achieve as he or she matures and undergoes scientific and
w! S" y7 F; Gpersistent training. But jumping to the conclusion that it is “anomalous”
7 o+ ]; G, h$ p; q7 u: C# Ybased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! \. y% N: }7 L9 d, {8 \, b/ Q# Q
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook* H' @7 o" N7 ]# Z/ n0 m }/ ]) W
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in6 l* y/ i6 O& C/ @
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
- Y' a% _# u5 m; ^' y0 \% Y. f$ Ahe chose not to push himself too hard and to conserve his energy for later) e- t z1 G! N/ \& O! s
events (whether this conforms to the Olympic spirit and the ‘use one’s) k0 N! L0 ~' J4 m D8 N: r: w
best efforts to win a match’ requirement that the Badminton World
4 x3 S& ?+ U7 J. a. P8 kFederation recently invoked to disqualify four badminton pairs is another H: m+ g$ E8 D" ?2 M0 V. |
topic worth discussing, though probably not in Nature). Ye, on the other
" T2 H( O" h3 M" K, ?5 Y8 Ihand, was trailing behind after the first 300 metres and relied on freestyle0 e/ g+ f, f4 c [2 i% A o
, in which she has an edge, to win the race. Failing to mention this. h# v, h+ G/ T; _5 |% [1 @ G; `
strategic difference, as well as the fact that Lochte is 23.25 seconds4 t( O+ r* o+ `: Q9 Z
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
, \& |0 L( V6 M6 C( D7 b# {: wfaster than the best man in the same sport, which sounds impossible. Putting0 g4 T. N5 _' R7 `4 P n0 S
aside the gender argument, I believe this is still a leading question that5 ]+ h3 W0 j( Q" A5 @' t
implies to the reader that there is something fishy going on.
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! l6 e$ R% D( e; ~Fourth is another example of cherry-picking. In the same event, there are% i5 { m% I6 M8 D' k! a
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93; X4 y+ y. S/ ]! I* R9 m
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s0 i: z. U& w- C
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns6 n" L2 K6 @7 D2 ^5 d
out, if we are just talking about the last 50 metres in a 400-metre IM,) A$ g8 a/ ?7 O/ A9 k* n3 @' J
Lochter is not the example I would have used if I were the author. What kind
5 B4 Y- G2 Q. r/ |2 [3 ]of scientific rigorousness is Callaway trying to demonstrate here? Is it- M7 ?: Y D4 R- K! Y9 v
logical that if Lochter is the champion, we should assume that he leads in2 k. b5 z; P) J# B J/ g
every split? That would be a terrible way to teach the public how science
4 f0 R3 B8 Z8 n0 h3 i cworks.% d7 N0 ?3 H4 S$ m1 q
4 |$ B! G+ e1 Z8 e8 f5 oFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
8 }- M4 Y6 B5 W. S5 M. nimplies that a drug test cannot rule out the possibility of doping. Is this9 I& A& U- B: p, W+ Q) t$ _% m- Y
kind of agnosticism what Nature really wants to teach its readers? By that
0 Q: g8 i# t$ T4 B, z6 |standard, I estimate that at least half of the peer-reviewed scientific
% ]9 ~8 K( T3 M# x" [papers in Nature should be retracted. How can one convince the editors and
0 F5 I& Y$ |! ]3 C% L6 N8 j- Kreviewers that their proposed theory works for every possible case? One, X1 r4 H/ @9 D
cannot. One chooses to apply the theory to typical examples and to B/ S4 X! _+ {. U9 a1 B( b
demonstrate that in (hopefully) all scenarios considered, the theory works
7 C) |2 Y u7 k/ Dto a degree, and that that should warrant publication until a counterexample# \8 l: t2 ~5 t% t+ M3 @6 ~% C8 p
is found. I could imagine that Callaway has a sceptical mind, which is9 ^" E8 ]* \! F g. {- b5 C2 H1 p
crucial to scientific thinking, but that would be put to better use if he
0 e+ v. K2 m2 t! q/ D% iwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
8 o( b9 l$ O3 y4 I2 `! h! @" Z qadvanced, non-detectable drug that the Chinese have come up with in the( T4 h( E* s. i" j O
past 4 years (they obviously did not have it in Beijing, otherwise why not% l1 F! j3 `7 Z5 U1 n* v
use it and woo the audience at home?), based on data and rational derivation
, }3 R- L' Y* q) y% d. This article, however, can be interpreted as saying that all athletes are. Z5 y" b4 P K4 E( X" ^5 E+ z
doping and the authorities are just not good enough to catch them. That may
# h7 I% l) I3 Z; mbe true, logically, but definitely will not make the case if there is ever a2 X; `8 }4 P4 [0 e
hearing by the governing body for water sports, FINA, to determine if Ye
; K; m+ C* O ohas doped. To ask whether it is possible to obtain a false negative in a% u) I! g8 z* n0 [
drug test looks like a rigged question to me. Of course it is possible:
: h) c, i' U; g2 W$ \2 l/ rother than the athlete taking a drug that the test is not designed to detect4 t9 |" N( A) b: l% ~- e
, anyone who has taken quantum 101 will tell you that everything is3 k. \- c. L8 L$ r
probabilistic in nature, and so there is a probability that the drug in an
7 E# A- y/ U7 P, w- j( Zathlete’s system could tunnel out right at the moment of the test. A slight
9 k* ?% `. Z8 A: r; Zchance it may be, but should we disregard all test results because of it?/ @# [# q5 S& I: R* _* ]
Let’s be practical and reasonable, and accept that the World Anti-Doping
) m: J/ }) w7 o! t% |agency (WADA) is competent at its job. Ye’s urine sample will be stored for
" p" t9 f3 A& ?' k1 c/ \( t+ c& ^eight years after the contest for future testing as technology advances.: ~1 A8 @; \. \2 V, C
Innocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-' s% V" P P9 O$ r7 x0 M
competition drug test is already in effect, which Callaway failed to mention
4 {3 s) Y: _4 z2 S. As noted in the president of WADA’s press release, drug testing for
+ O E2 n0 D2 x8 q+ P! GOlympians began at least six months before the opening of the London
/ u. g& Z' Y2 d* f. TOlympics. Furthermore, 107 athletes have been banned from this Olympics for
6 I4 z, m) N6 N9 g/ kdoping. That may be the reason that “everyone will pass at the Olympic' n6 l9 L% w$ V0 s
games. Hardly anyone fails in competition testing” — those who did dope4 J5 I9 x* A3 ` h6 K
have already been caught and sanctioned. Callaway is free to suggest that a# n& W: g7 {- D0 J
player could have doped beforehand and fooled the test at the game, but this7 M6 K' h- s, G# f7 `
possibility is certainly ruled out for Ye.
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+ E/ t" Z4 b9 ^ B. |& HOver all, even though Callaway did not falsify any data, he did (
0 C: Z% H9 {+ E3 ^) Rintentionally or not) cherry-pick data that, in my view, are far too
9 [7 l6 Q; J& osuggestive to be fair and unbiased. If you want to cover a story of a. |& f- z" R* u* Z1 ~2 p4 }7 y
suspected doping from a scientific point of view, be impartial and provide) i! O9 E4 C$ P
all the facts for the reader to judge. You are entitled to your' x* y" |* E: Q9 b% o! K3 q
interpretation of the facts, and the expression thereof in your piece,- F* @0 @0 _& Q: m# q1 W2 H
explicitly or otherwise, but showing only evidence that favours your
~2 l( E$ }% j. Bargument is hardly good science or journalism. Such an article in a journal1 G1 M5 T: V( q4 i& m; F
such as Nature is not an appropriate example of how scientific research or
, {* j3 O/ v- |3 p) ^4 {/ `* [reporting should be done. |
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