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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! r2 `, @7 A9 p6 E- g% b! } P
如果是中国长大的,英语能到这种程度真是很不简单。 W9 z0 o: }1 ~- ?; ^' ]& I
1 a$ X' p) D3 \) t/ V$ ?, Phttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania# h ^( l2 s# V! a- P
5 T! t) c$ P4 a8 c9 a4 _It is a shame to see Nature — which nearly all scientists, including myself
6 e% [6 k! ~; z( h* h' d, regard as one of the most prestigious and influential physical-science
( s( I- ^( l$ X% h C; Vmagazines — publish a thinly veiled biased article like this. Granted, this
( ]% m; {; q6 g. @# ]is not a peer-reviewed scientific article and did not go through the
4 |9 g% W) Z0 V, d4 P1 y# P. Hscrutiny of picking referees. But to serve as a channel for the general
7 J) l: r1 K, W* U" j8 [populace to be in touch with and appreciate science, the authors and editors
- X! x* b* H" Z5 D6 K; y1 bshould at least present the readers with facts within the proper context,
, n& q- o7 P$ {; ?& g! D5 ~* pwhich they blatantly failed to do.
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4 x: @! z% ]6 zFirst, to identify Ye’s performance increase, Ewen Callaway compared her4 ~9 u" E" o' D
Olympic 400-metre IM time with her performance at the World Championships in
@1 ^7 g, w& q8 O2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
8 T& b1 I3 c+ q' q0 M. l$ P. Ganomalous” improvement of around 7 seconds (6.72 s). In fact, her previous5 _$ c, n- v) a% y
personal best was 4:33.79 at the Asian Games in 2010. This leads to an1 Y3 o" {5 y- s; h
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ Z9 l# l; c7 c% |3 S# ?
difference between the gold and silver medal, I see no reason for 5.38 s to% v$ L1 R1 h0 J- K/ x& M0 J4 T
be treated as 7 s.5 Y4 O# j1 M& N+ T+ [; v
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Second, as previously pointed out, Ye is only 16 years old and her body is
$ A# o9 L( _8 B* I) Ustill developing. Bettering oneself by 5 seconds over two years may seem
) p. x1 z6 w; x& K8 ~impossible for an adult swimmer, but it certainly happens among youngsters." ]+ F, F) P. y
An interview with Australian gold medallist Ian Thorpe revealed that his 400& b0 V6 W9 i, K! k v5 O
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
1 j( S! G0 J3 t$ }! k7 {7 GFor regular people, including Callaway, it may be hard to imagine what an: f" N5 \4 i+ [& p u5 O) h
elite swimmer can achieve as he or she matures and undergoes scientific and
) I6 [! x3 g" M( ypersistent training. But jumping to the conclusion that it is “anomalous”6 v6 X* T/ T3 [! Q
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.5 ?* |- i9 k8 ?
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
; y( d* _9 Z, k% ]+ z5 }: S' Q1 T& _example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
( {0 k0 X: M, H' R D5 I* d% H# Othe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
$ |2 b7 X: n: [* bhe chose not to push himself too hard and to conserve his energy for later- Y3 U0 h( y1 D- }/ o
events (whether this conforms to the Olympic spirit and the ‘use one’s
& X( G+ w" b/ M0 z) Abest efforts to win a match’ requirement that the Badminton World$ K2 E0 [. L& L/ A: G
Federation recently invoked to disqualify four badminton pairs is another
5 `/ i7 E' B! M$ x" Htopic worth discussing, though probably not in Nature). Ye, on the other; y6 P h& ~& c) N7 h
hand, was trailing behind after the first 300 metres and relied on freestyle
+ y) q( b4 R6 N) V' @. V" ^, in which she has an edge, to win the race. Failing to mention this
) D1 i; z6 ~, B7 n' e7 |) cstrategic difference, as well as the fact that Lochte is 23.25 seconds8 O6 w9 {* c& G' ?0 @* f, ]
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
: z, @9 H5 i: U4 X( Y, ^faster than the best man in the same sport, which sounds impossible. Putting h3 A D& q E o
aside the gender argument, I believe this is still a leading question that" h" v8 M! [" h' T9 t& E
implies to the reader that there is something fishy going on.* E& m. d4 C8 }- f9 W9 E4 Y
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Fourth is another example of cherry-picking. In the same event, there are' b. h. N9 [3 r' K
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.933 ~% Q- t! P9 n# q
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s/ ~. K" C/ E+ Y+ p# A) R
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns( G! X/ ~7 j) D+ E7 O: P( L4 t
out, if we are just talking about the last 50 metres in a 400-metre IM,
5 ^) R2 S+ {9 j1 o/ w6 gLochter is not the example I would have used if I were the author. What kind5 B' P+ H- L# G5 w, j
of scientific rigorousness is Callaway trying to demonstrate here? Is it
' I0 H- e+ f$ o$ slogical that if Lochter is the champion, we should assume that he leads in) I1 h/ d$ z5 e' J/ X: |. `
every split? That would be a terrible way to teach the public how science
9 ~% V6 Q9 C0 Oworks.
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7 R7 x6 s4 p% L K4 w/ sFifth is the issue I oppose the most. Callaway quotes Ross Tucker and1 y0 C3 h/ i; \
implies that a drug test cannot rule out the possibility of doping. Is this) f7 t0 H9 X; F
kind of agnosticism what Nature really wants to teach its readers? By that
3 B8 m* }- s' v1 `" h- P) [standard, I estimate that at least half of the peer-reviewed scientific8 J$ }# z) F; o- j+ r- S
papers in Nature should be retracted. How can one convince the editors and
) }" c5 v) m: Wreviewers that their proposed theory works for every possible case? One
# q. o: ]9 X5 @4 f' }% mcannot. One chooses to apply the theory to typical examples and to
: k' T7 M, ] v( b, b. Zdemonstrate that in (hopefully) all scenarios considered, the theory works( u6 P! x% Y6 M
to a degree, and that that should warrant publication until a counterexample
. u6 p0 E* ?- d$ |* ^is found. I could imagine that Callaway has a sceptical mind, which is/ i2 w, L3 \% X N8 u4 U3 e" I. T
crucial to scientific thinking, but that would be put to better use if he
1 D5 L& f( d+ O+ Y. A. nwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly! \' S! u0 H* D9 d! ^# X6 g
advanced, non-detectable drug that the Chinese have come up with in the& {1 u( B2 w/ G6 m1 W
past 4 years (they obviously did not have it in Beijing, otherwise why not
; X5 p# M8 @( M* H* uuse it and woo the audience at home?), based on data and rational derivation
% i) i! \3 j$ P0 u# Y5 D. This article, however, can be interpreted as saying that all athletes are% Z1 [; p0 s+ J: b7 F( N4 S
doping and the authorities are just not good enough to catch them. That may
* O% A6 @# J2 I, sbe true, logically, but definitely will not make the case if there is ever a
" p, @3 i4 @4 I# x# K- c) Ehearing by the governing body for water sports, FINA, to determine if Ye0 C$ c8 b6 }6 n
has doped. To ask whether it is possible to obtain a false negative in a" W0 A4 L5 ]$ M9 J- ^0 [
drug test looks like a rigged question to me. Of course it is possible:
1 r' [' s0 s' w/ Bother than the athlete taking a drug that the test is not designed to detect/ L/ m" k4 _1 ^: g
, anyone who has taken quantum 101 will tell you that everything is
' d6 X5 h3 r! cprobabilistic in nature, and so there is a probability that the drug in an5 a2 g5 X. _8 k# z; z7 K0 j" h
athlete’s system could tunnel out right at the moment of the test. A slight
, M1 \' H/ N& s) L. U9 gchance it may be, but should we disregard all test results because of it?
/ g1 F7 h8 n* d& F' B6 z. {4 D( {% lLet’s be practical and reasonable, and accept that the World Anti-Doping0 n$ E6 k- H( f$ H' B' Z2 s
agency (WADA) is competent at its job. Ye’s urine sample will be stored for' L! B4 n, d4 e0 D% R4 P: z
eight years after the contest for future testing as technology advances.' Q% }; ~2 `. R3 R* G" f& `
Innocent until proven guilty, shouldn’t it be?* y9 }7 \: S- }$ B
8 y0 s8 I- E4 U; ISixth, and the last point I would like to make, is that the out-of-5 h: ^4 s& j; d! O' K0 M
competition drug test is already in effect, which Callaway failed to mention
- w- y. l# w. p6 z. As noted in the president of WADA’s press release, drug testing for, d+ g. j! ?) B
Olympians began at least six months before the opening of the London" E; K' I4 X4 p) Y7 \
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
$ j }$ a( C9 T; P# m# Sdoping. That may be the reason that “everyone will pass at the Olympic
) o) `$ z( I! Tgames. Hardly anyone fails in competition testing” — those who did dope5 Q" g: s2 _5 A4 z
have already been caught and sanctioned. Callaway is free to suggest that a* s# a' p6 [& u- ?; U: _
player could have doped beforehand and fooled the test at the game, but this, r: H+ q- {2 a7 a% N
possibility is certainly ruled out for Ye.7 }: L6 o1 b b( p( L M' K( V$ l/ p# p
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Over all, even though Callaway did not falsify any data, he did (4 T! ]! Q1 N) E2 p& ~1 [7 y
intentionally or not) cherry-pick data that, in my view, are far too
0 f+ l; G4 _+ ysuggestive to be fair and unbiased. If you want to cover a story of a
1 T" z6 r$ {& ?6 G' xsuspected doping from a scientific point of view, be impartial and provide& l! [+ f. B S- _% Y T# Y
all the facts for the reader to judge. You are entitled to your" o% ^+ @4 |; `- X7 q
interpretation of the facts, and the expression thereof in your piece,: x! z- f2 J$ z' f
explicitly or otherwise, but showing only evidence that favours your8 X% m) A/ L- |3 @' }) t X
argument is hardly good science or journalism. Such an article in a journal. q9 M* S W& w7 b/ i1 Q( {
such as Nature is not an appropriate example of how scientific research or
9 E9 |1 n4 z' f/ c& greporting should be done. |
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