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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% @" T! u& L6 ]0 o3 }
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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W' {9 B! a( U7 E9 xhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM 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
; j. q4 {1 d8 h0 k3 b" b, }$ U5 F, W, regard as one of the most prestigious and influential physical-science3 u. B0 S* ~- \/ `" W/ r; n
magazines — publish a thinly veiled biased article like this. Granted, this- Q& r: Q3 t+ x. k
is not a peer-reviewed scientific article and did not go through the0 r. c* E. W" w+ {9 l$ p# W$ H% f
scrutiny of picking referees. But to serve as a channel for the general
# _ A% D7 g7 J6 G+ q" r5 G% j3 H7 M& Hpopulace to be in touch with and appreciate science, the authors and editors% e' `% D/ I/ {! p% T% f/ J
should at least present the readers with facts within the proper context,
5 B9 g5 j5 J( S( D6 Zwhich they blatantly failed to do., ~$ a" M, C# c) f
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First, to identify Ye’s performance increase, Ewen Callaway compared her
* i3 T/ ]9 S: C/ nOlympic 400-metre IM time with her performance at the World Championships in2 o$ _5 g& i b; v* o
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “2 w$ v% K' Y' `1 m8 o
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
% p+ |# v1 Q9 u4 Ypersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
- [' o) i. p( T: ^" O( Uimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the" v2 `1 }. i) O0 y
difference between the gold and silver medal, I see no reason for 5.38 s to- r' T3 I4 W( r" O( c4 N' ~/ S
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is g% X" H/ v$ V$ T* a9 G* h
still developing. Bettering oneself by 5 seconds over two years may seem
( }2 j% a1 B! C8 a- r) h) Ximpossible for an adult swimmer, but it certainly happens among youngsters./ l/ ^/ f; }% t" O! K$ S" w
An interview with Australian gold medallist Ian Thorpe revealed that his 400
: S2 L0 R) D. K* s/ n4 v% D-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
+ A- S0 E7 Z9 B& m: JFor regular people, including Callaway, it may be hard to imagine what an
* Q2 Y2 @% m+ U5 o! l7 F2 selite swimmer can achieve as he or she matures and undergoes scientific and
1 u5 A4 x: e' @persistent training. But jumping to the conclusion that it is “anomalous”- ?" r5 D$ T! I4 F7 n
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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8 I3 G k# x0 Y, `) ^Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook4 O3 [- L+ I' O6 ^
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in2 u: k- Y% h/ D
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so. l: B. X, ]/ q3 G! D6 |( _9 M- m
he chose not to push himself too hard and to conserve his energy for later' i7 V1 v& B- F% s% b4 e0 u
events (whether this conforms to the Olympic spirit and the ‘use one’s U( t) H$ l: {% `4 E1 r6 x
best efforts to win a match’ requirement that the Badminton World
2 c- U( \" s8 M \4 aFederation recently invoked to disqualify four badminton pairs is another
3 [* y4 v' ?& d- g; v0 {topic worth discussing, though probably not in Nature). Ye, on the other
% L, b$ p& U' e6 m4 l" Chand, was trailing behind after the first 300 metres and relied on freestyle2 ]4 g/ @$ r3 q+ N- L Y0 I
, in which she has an edge, to win the race. Failing to mention this
; j1 u* _( } a( vstrategic difference, as well as the fact that Lochte is 23.25 seconds
4 L3 D' v; n; Bfaster (4:05.18) than Ye overall, creates the illusion that a woman swam. F$ H" \/ d ~, Y
faster than the best man in the same sport, which sounds impossible. Putting8 G) s1 r, w# J8 c0 g5 |0 C. Z' v3 H1 x
aside the gender argument, I believe this is still a leading question that
" z! B2 z& ]& f& e$ O, I$ m3 Rimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are
0 K) @5 }, U2 x3 s; ]8 f- x+ Qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
4 s. B. M" @0 Fs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
' O5 J* p3 ^- g$ e), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns$ E$ _3 N: A2 O# T1 ]: z1 I. m) H
out, if we are just talking about the last 50 metres in a 400-metre IM,+ I& v/ i7 c; y1 x& p0 _7 ~
Lochter is not the example I would have used if I were the author. What kind8 o( ?. N/ j( y: @2 `& T( k
of scientific rigorousness is Callaway trying to demonstrate here? Is it( R, T+ M7 F; d: t& c
logical that if Lochter is the champion, we should assume that he leads in
( }1 T" D; p* pevery split? That would be a terrible way to teach the public how science6 M. L$ L% f+ ?. G- y2 s
works.
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# S v% \% N* S) ~% nFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
: _1 ?# \" B3 @1 q: Cimplies that a drug test cannot rule out the possibility of doping. Is this) S3 B" Z) U& \
kind of agnosticism what Nature really wants to teach its readers? By that5 d. f, ]! y+ p' \: P% L1 s
standard, I estimate that at least half of the peer-reviewed scientific6 b9 v" K i9 B6 _( u
papers in Nature should be retracted. How can one convince the editors and1 F: @- u* r1 C% Y, m
reviewers that their proposed theory works for every possible case? One
% t# y# B* f1 s: S! A- Q2 ucannot. One chooses to apply the theory to typical examples and to% q9 q- ^- |( c z( p
demonstrate that in (hopefully) all scenarios considered, the theory works
7 a0 p5 r9 {( J! \ T5 ?* C$ E3 wto a degree, and that that should warrant publication until a counterexample) G; I" C- `" E
is found. I could imagine that Callaway has a sceptical mind, which is& r, j$ ~* u. }: W" F
crucial to scientific thinking, but that would be put to better use if he7 F# A9 N. v2 p9 d6 F
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
0 `) T m, V* Aadvanced, non-detectable drug that the Chinese have come up with in the
- e1 ~- X! t: W! o8 K! F' hpast 4 years (they obviously did not have it in Beijing, otherwise why not
) d: z( W7 b% ^; t" K/ {& Luse it and woo the audience at home?), based on data and rational derivation5 G! K3 d0 b/ G3 z2 ~0 e, M
. This article, however, can be interpreted as saying that all athletes are
: S& A4 n- o b( Z* J/ c2 adoping and the authorities are just not good enough to catch them. That may% z3 Y8 U( p. z z* a) E
be true, logically, but definitely will not make the case if there is ever a5 f6 Q2 ?: H9 g
hearing by the governing body for water sports, FINA, to determine if Ye
$ I" N9 d8 r# E. m! Khas doped. To ask whether it is possible to obtain a false negative in a
5 ^. x* @+ D* t. I0 c! H$ jdrug test looks like a rigged question to me. Of course it is possible:
7 u5 K: ? ]: r# bother than the athlete taking a drug that the test is not designed to detect2 q5 n2 F7 W: H1 Y" q
, anyone who has taken quantum 101 will tell you that everything is5 c: u( b; z/ n% u8 P" ^% F% `( ]
probabilistic in nature, and so there is a probability that the drug in an
! j3 b, c4 C1 }2 U' k; ~athlete’s system could tunnel out right at the moment of the test. A slight! O- |5 w6 q F% g0 P$ b
chance it may be, but should we disregard all test results because of it?
; R( q# a/ Y" F) N0 ILet’s be practical and reasonable, and accept that the World Anti-Doping5 g' Y( @( ~8 y' c7 }3 c' i
agency (WADA) is competent at its job. Ye’s urine sample will be stored for# @' F% J' }) i
eight years after the contest for future testing as technology advances.
) O4 o% y) {# G9 qInnocent until proven guilty, shouldn’t it be?
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. X3 \, O: O2 s7 P5 l$ YSixth, and the last point I would like to make, is that the out-of-
! D' D( |2 A" {competition drug test is already in effect, which Callaway failed to mention
8 R5 m0 v2 q( ]; W; h1 P. As noted in the president of WADA’s press release, drug testing for" C) q$ W" S9 e" W: Q
Olympians began at least six months before the opening of the London
) i w$ i h& sOlympics. Furthermore, 107 athletes have been banned from this Olympics for; Q, ^8 U& D) |3 E- T( e* G9 \
doping. That may be the reason that “everyone will pass at the Olympic
$ @* n7 Y# F5 _" K- k. R$ Mgames. Hardly anyone fails in competition testing” — those who did dope% o8 l0 e7 b# k2 ~+ o, g9 \, Q
have already been caught and sanctioned. Callaway is free to suggest that a
6 Q, ~7 m( k. J0 Rplayer could have doped beforehand and fooled the test at the game, but this$ z" ^2 s+ k/ ?6 M" @* M
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
7 q' q. g' R% W6 Y% @4 F3 jintentionally or not) cherry-pick data that, in my view, are far too
$ Z. v2 k! j( |8 hsuggestive to be fair and unbiased. If you want to cover a story of a
; p9 p+ d- T7 u6 X& V( g e" Qsuspected doping from a scientific point of view, be impartial and provide/ \4 w3 l. S' G6 h z0 R* P! o
all the facts for the reader to judge. You are entitled to your+ C" L9 x. U& |1 O
interpretation of the facts, and the expression thereof in your piece,
9 c0 W9 }, I1 e; @( uexplicitly or otherwise, but showing only evidence that favours your+ e$ M8 ?+ v5 J; @- X: L' J/ l; w
argument is hardly good science or journalism. Such an article in a journal4 D) ~$ E4 M! X; k% N* f7 j
such as Nature is not an appropriate example of how scientific research or5 J& a) } |3 e5 P% x
reporting should be done. |
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