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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 JIANG3 m3 w0 V$ ^! h4 k' t3 J& S! R _6 q
如果是中国长大的,英语能到这种程度真是很不简单。. m8 e: u; L6 A. f; y* ^
9 I) t( w* o& P7 V9 ihttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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' ?* \5 ]4 p3 w8 l; KFROM LAI JIANG, Department of Chemistry, University of Pennsylvania0 ~7 d8 i, c% ^$ E5 C/ |; d
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It is a shame to see Nature — which nearly all scientists, including myself
, a+ e! l c% z' U# ?, regard as one of the most prestigious and influential physical-science6 B2 z: e1 i; f, i7 d
magazines — publish a thinly veiled biased article like this. Granted, this2 k1 `/ Q, G1 y: F# N& ?$ M
is not a peer-reviewed scientific article and did not go through the% t- [; ^ y$ r3 a0 C7 ~
scrutiny of picking referees. But to serve as a channel for the general& G3 G' u9 k* L# A2 w1 S& f7 |
populace to be in touch with and appreciate science, the authors and editors H! H2 i9 g' r; f4 e' A) |: O
should at least present the readers with facts within the proper context,
Z" |4 C4 S3 x0 h% n; h! `, C* Cwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her2 x% U2 k* g$ A( |" { j/ W% t
Olympic 400-metre IM time with her performance at the World Championships in
- \" `: | B. u; F0 K2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
& S4 M" i+ f$ Banomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
; ]# J Y; T& o6 Qpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
2 l6 L9 H1 b+ C3 \8 x8 b4 @improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the6 X5 o7 N1 C6 o) ~. a
difference between the gold and silver medal, I see no reason for 5.38 s to) c2 E% w% I# q, I
be treated as 7 s.& L* _# A' i: S% z, I" \2 Z! F
$ @& N/ f% r$ p5 D) gSecond, as previously pointed out, Ye is only 16 years old and her body is1 r: _9 T( `$ T
still developing. Bettering oneself by 5 seconds over two years may seem
4 I( q2 ` r1 `/ G |3 o3 f7 Qimpossible for an adult swimmer, but it certainly happens among youngsters.' C! Y! o3 ]7 g: b9 \0 \
An interview with Australian gold medallist Ian Thorpe revealed that his 400
. M3 g6 `) d% g8 O6 o, P R7 ^# ~-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
5 k" E! A. e3 Q# P4 v4 Q' _) oFor regular people, including Callaway, it may be hard to imagine what an
7 d3 F e+ s7 S9 H! S0 delite swimmer can achieve as he or she matures and undergoes scientific and5 t# t8 _& k9 f5 |! G" S
persistent training. But jumping to the conclusion that it is “anomalous”' @# z( u+ G5 H9 P+ g
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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$ w% A/ |, c- S/ h9 N3 BThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
: I- r3 z5 F! v7 X* Jexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in$ o* u9 G" j8 k$ @
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so; u- e2 W* G! w3 t; M' K
he chose not to push himself too hard and to conserve his energy for later5 W: K5 r3 L- _
events (whether this conforms to the Olympic spirit and the ‘use one’s9 t/ v0 y, a6 b1 k
best efforts to win a match’ requirement that the Badminton World
: Q* Q( |. s: EFederation recently invoked to disqualify four badminton pairs is another
: }4 e: U0 U) ]/ L7 Q3 t' H4 ttopic worth discussing, though probably not in Nature). Ye, on the other
# G! [* J& r/ {$ k( Jhand, was trailing behind after the first 300 metres and relied on freestyle4 T9 @2 L2 L. L% J4 Q$ _& {% ^
, in which she has an edge, to win the race. Failing to mention this0 ~4 D% {4 D0 [* _/ A# H
strategic difference, as well as the fact that Lochte is 23.25 seconds
9 I3 c; X( I% W4 `" efaster (4:05.18) than Ye overall, creates the illusion that a woman swam+ G8 S0 c5 V4 v- m; w5 T. x( {8 U
faster than the best man in the same sport, which sounds impossible. Putting
. Y: d& i/ x( X! S' L" Z1 ]aside the gender argument, I believe this is still a leading question that* O! T- t$ V$ I; o9 _* O
implies to the reader that there is something fishy going on.; o$ Q; X( [# c" k
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Fourth is another example of cherry-picking. In the same event, there are" S8 y/ C. K: w
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
& {- e! `3 i! Bs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s+ A0 o7 Z+ O8 K Z: z
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
, R3 C9 I: b6 I7 S y: K% S8 tout, if we are just talking about the last 50 metres in a 400-metre IM,
/ Z" p( H3 q; F8 \6 V. [3 W' rLochter is not the example I would have used if I were the author. What kind9 ]6 `# m* ]6 f5 u+ e$ ]
of scientific rigorousness is Callaway trying to demonstrate here? Is it
7 Q9 n5 h' }! x, j: {4 Q& H3 l6 Mlogical that if Lochter is the champion, we should assume that he leads in
2 n+ j2 L( X/ k' F2 v& {5 s/ ]every split? That would be a terrible way to teach the public how science
: U: K8 ]6 p% }1 z, a4 Y. r& ^works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
; h8 v1 G- v9 Simplies that a drug test cannot rule out the possibility of doping. Is this
3 O: H$ D1 x) ~" k9 X X& @kind of agnosticism what Nature really wants to teach its readers? By that
2 ]/ y j7 w- H) T( m1 `8 u# u) ustandard, I estimate that at least half of the peer-reviewed scientific& j% n t" S) U3 G8 J
papers in Nature should be retracted. How can one convince the editors and: m. y5 a* O$ Q0 n" h' G, C
reviewers that their proposed theory works for every possible case? One, ^: p# y. w" m- O- Y
cannot. One chooses to apply the theory to typical examples and to" \8 x. M& m; }) F7 t
demonstrate that in (hopefully) all scenarios considered, the theory works4 `' Q/ ?, X, H" a) ^
to a degree, and that that should warrant publication until a counterexample4 L# V7 X* T" f4 ?" X& h
is found. I could imagine that Callaway has a sceptical mind, which is
# M# b& s0 Z4 q* w b/ n- Ecrucial to scientific thinking, but that would be put to better use if he, \$ }2 R0 a5 \- n& @ F
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 u* E, R# g! O* t8 d2 ]
advanced, non-detectable drug that the Chinese have come up with in the8 l' r& k2 g/ i1 o
past 4 years (they obviously did not have it in Beijing, otherwise why not
; L% I2 t: G1 F( E# s! q8 [use it and woo the audience at home?), based on data and rational derivation
8 ~9 j8 Z3 t5 K8 B* N2 `- E& D# _; {. This article, however, can be interpreted as saying that all athletes are5 {" m% [% F# p q" a
doping and the authorities are just not good enough to catch them. That may
1 p* H, w$ W: W& sbe true, logically, but definitely will not make the case if there is ever a+ f0 w# n& a6 y% Z1 L) o$ T; F
hearing by the governing body for water sports, FINA, to determine if Ye
' j/ M. S9 g7 V4 R, mhas doped. To ask whether it is possible to obtain a false negative in a
# b$ v7 L% s- T( x" F5 j- O, N+ \drug test looks like a rigged question to me. Of course it is possible:6 X1 Y2 F5 ~8 W5 `+ Z. `4 \* v/ i/ ~
other than the athlete taking a drug that the test is not designed to detect3 o$ T2 V( p+ O% Q' K7 b3 |2 _
, anyone who has taken quantum 101 will tell you that everything is
8 { ~) Y8 q8 Q1 h5 nprobabilistic in nature, and so there is a probability that the drug in an e, p, I. |' H& R, y
athlete’s system could tunnel out right at the moment of the test. A slight7 C t! u: v) v
chance it may be, but should we disregard all test results because of it?
" U/ Z! w# Y$ v; F( }2 ^Let’s be practical and reasonable, and accept that the World Anti-Doping6 L& S& o" l' e n' l) t
agency (WADA) is competent at its job. Ye’s urine sample will be stored for$ a4 D9 F" M$ K7 ^, n# ]& N
eight years after the contest for future testing as technology advances.
. x7 I! _7 L8 IInnocent 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-) z5 V& }; D) G5 J7 E3 L6 _
competition drug test is already in effect, which Callaway failed to mention
; O4 z9 f- V$ J! B0 A: e$ G' q. As noted in the president of WADA’s press release, drug testing for4 b* z6 a1 I, n" K5 [
Olympians began at least six months before the opening of the London
1 H# H& `3 q5 A( _% s+ y& U" {Olympics. Furthermore, 107 athletes have been banned from this Olympics for
4 B' K1 A. \1 l) _doping. That may be the reason that “everyone will pass at the Olympic
6 i3 H, s6 @1 C. b; ogames. Hardly anyone fails in competition testing” — those who did dope3 X; ?+ A& w3 }, {4 z8 _7 C; N
have already been caught and sanctioned. Callaway is free to suggest that a
4 f9 N: a* p, Y4 ?8 q" Xplayer could have doped beforehand and fooled the test at the game, but this$ l) Z$ K4 e+ [( m
possibility is certainly ruled out for Ye.
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- p! c! [0 _, C4 y# K0 SOver all, even though Callaway did not falsify any data, he did (
& @, U1 X/ M' |4 ^' t" V/ T: L: e* [intentionally or not) cherry-pick data that, in my view, are far too
- _ k: k! F$ |/ k7 d% Q' t4 Ksuggestive to be fair and unbiased. If you want to cover a story of a
6 M8 X, D2 ~0 I, s2 I' m4 }+ e( asuspected doping from a scientific point of view, be impartial and provide/ H* a* ]4 s o
all the facts for the reader to judge. You are entitled to your+ A1 N$ ]$ q3 \9 D& C8 D
interpretation of the facts, and the expression thereof in your piece,
) M3 A0 I1 {; s& T( Vexplicitly or otherwise, but showing only evidence that favours your: c, z3 m) Q3 a4 t/ u3 L. H- W
argument is hardly good science or journalism. Such an article in a journal
- @# T4 {6 I$ I% Q7 Msuch as Nature is not an appropriate example of how scientific research or5 Y' h* X+ V5 o5 ^, m2 S8 y
reporting should be done. |
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