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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 JIANG4 n' V+ s' `4 l/ |
如果是中国长大的,英语能到这种程度真是很不简单。1 }* [, J W& W
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html: ]" w! ]" E( ~2 t" B* X0 \7 `
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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
6 v. H# t' P2 I, regard as one of the most prestigious and influential physical-science
% _! D8 q" A$ L# J) X+ @+ b+ u$ ~magazines — publish a thinly veiled biased article like this. Granted, this
5 ]2 ~8 Y) P4 g. `( |is not a peer-reviewed scientific article and did not go through the
" ~+ {( [# Z% u* X/ {* l' `scrutiny of picking referees. But to serve as a channel for the general
" \) d1 l( d: y3 t% S% \populace to be in touch with and appreciate science, the authors and editors
- p, h* _" {$ s/ }& h6 @9 D2 j Ushould at least present the readers with facts within the proper context,; t# b6 `9 o% Z1 c/ y" ^+ ^
which they blatantly failed to do.4 s$ c2 V; K& G6 z
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First, to identify Ye’s performance increase, Ewen Callaway compared her
" Y) M: J9 I( t" z: d) i( I1 r4 XOlympic 400-metre IM time with her performance at the World Championships in
0 }5 U/ [5 N( @' l) i2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “" h: z7 D& l# b
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous! I# X ^, a& _ m! |! F' G. ?
personal best was 4:33.79 at the Asian Games in 2010. This leads to an/ t. T* L9 n9 C P) s8 q
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the* c0 }7 I4 g3 G) J5 U. v- r4 d
difference between the gold and silver medal, I see no reason for 5.38 s to
) h3 ^% J* a9 h6 n) j& Lbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is( B9 B7 e0 l& u% n, }
still developing. Bettering oneself by 5 seconds over two years may seem& [" i* Q( f k9 Y, Q
impossible for an adult swimmer, but it certainly happens among youngsters., w: B4 J" O6 M E# i+ ?) O3 @
An interview with Australian gold medallist Ian Thorpe revealed that his 400
5 j5 C+ P9 q# y9 u9 m-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
, L8 K( p' Q" ZFor regular people, including Callaway, it may be hard to imagine what an
# j! n1 r+ _5 | E% L5 V( ^elite swimmer can achieve as he or she matures and undergoes scientific and
2 W; E& Y( U. u. M. Zpersistent training. But jumping to the conclusion that it is “anomalous”
3 m9 h# [5 u$ S' D1 obased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.* |5 x3 P0 u" Q3 m" D& R" {
& F5 h# Q" u& eThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
) @; Y7 y1 @7 D, Y# P/ U7 Yexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
`. p H, P- \9 j1 n& e! Zthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so3 ?& e4 _+ n! {; P( I1 D. _
he chose not to push himself too hard and to conserve his energy for later
! K2 I5 R8 w- j% s4 Vevents (whether this conforms to the Olympic spirit and the ‘use one’s
6 T) k4 c9 P0 sbest efforts to win a match’ requirement that the Badminton World
; ~5 E R# a/ O7 d5 lFederation recently invoked to disqualify four badminton pairs is another
) z* ]5 _3 R: vtopic worth discussing, though probably not in Nature). Ye, on the other
% `5 k& N0 r5 M* v9 A8 i5 Uhand, was trailing behind after the first 300 metres and relied on freestyle
& l3 y" Z2 M/ Y+ }3 x' S$ j# A* p, in which she has an edge, to win the race. Failing to mention this
" Y; e* S# b# ?strategic difference, as well as the fact that Lochte is 23.25 seconds
' Y7 y" Z/ E8 q2 c3 mfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
" I% e& f( n6 q% T# `% D0 }faster than the best man in the same sport, which sounds impossible. Putting$ h0 ^7 i ^9 g% w) X# ?3 h
aside the gender argument, I believe this is still a leading question that( b# [. ^# }; X) h; v3 F2 { F
implies to the reader that there is something fishy going on.6 K0 h% {8 q! X" U
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Fourth is another example of cherry-picking. In the same event, there are+ M6 d ~" w1 I8 E, z/ v+ E5 M
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93! n B6 k$ ~3 B% B* p
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s7 ?+ v, J, b5 S0 E j% p3 W5 f) N* @
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% P% f2 Y8 x, [( @7 V5 I" @# d4 R& Tout, if we are just talking about the last 50 metres in a 400-metre IM,
' E+ |. w9 `5 o: M8 L9 YLochter is not the example I would have used if I were the author. What kind
0 T: K8 _* I6 }$ W8 u' oof scientific rigorousness is Callaway trying to demonstrate here? Is it
3 y( _3 ?; k) b1 r* N, Xlogical that if Lochter is the champion, we should assume that he leads in$ c3 Y/ A7 H0 _* @' J
every split? That would be a terrible way to teach the public how science
8 ]' X7 v" Z8 w+ D4 F1 ^works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
/ v& J) w+ Q( rimplies that a drug test cannot rule out the possibility of doping. Is this! l9 o9 G+ [& w) j
kind of agnosticism what Nature really wants to teach its readers? By that
7 E3 c; @1 [' I4 r: \! p7 q7 kstandard, I estimate that at least half of the peer-reviewed scientific
0 R2 }4 Y8 J% V4 z5 _5 M, mpapers in Nature should be retracted. How can one convince the editors and
( S+ i) Q- N" Q9 Kreviewers that their proposed theory works for every possible case? One
) n' i6 z: A8 U" A" ?cannot. One chooses to apply the theory to typical examples and to- z% q: w& l* b& O% h) N2 ~( y
demonstrate that in (hopefully) all scenarios considered, the theory works2 i+ R+ w( {$ j5 d, P) k1 ^
to a degree, and that that should warrant publication until a counterexample* V. R( }6 Z- w3 y
is found. I could imagine that Callaway has a sceptical mind, which is
) H- H- J4 w. Wcrucial to scientific thinking, but that would be put to better use if he( h9 i7 @& K4 V% z
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
2 S$ D$ L; a' V S3 \advanced, non-detectable drug that the Chinese have come up with in the1 D: W, ^- a1 A; w( m8 \
past 4 years (they obviously did not have it in Beijing, otherwise why not7 m6 U0 j% t; D
use it and woo the audience at home?), based on data and rational derivation* r" C- \$ K6 b1 A. |9 E
. This article, however, can be interpreted as saying that all athletes are! r* _/ M: y3 H& w' Y" Q( I
doping and the authorities are just not good enough to catch them. That may: Z |( e8 u0 L8 K m3 X) k2 } W" g0 d9 m
be true, logically, but definitely will not make the case if there is ever a
1 h7 `+ G% C3 m$ R4 ohearing by the governing body for water sports, FINA, to determine if Ye
' W! {- g9 m' r0 a0 `has doped. To ask whether it is possible to obtain a false negative in a5 Y; V2 h( ], q& p( a
drug test looks like a rigged question to me. Of course it is possible:
/ t9 Y+ ~* q0 J/ S; Kother than the athlete taking a drug that the test is not designed to detect5 ?6 _0 ?# o5 |7 p' g
, anyone who has taken quantum 101 will tell you that everything is
& I2 e7 U1 o% z# m4 E# i, Nprobabilistic in nature, and so there is a probability that the drug in an
. F, M( \) R) Z2 p8 t: o8 Pathlete’s system could tunnel out right at the moment of the test. A slight
# A) M8 ~% A* e0 f7 K% @. D6 Nchance it may be, but should we disregard all test results because of it?
7 T( r/ m* V' b2 p( K: C( _Let’s be practical and reasonable, and accept that the World Anti-Doping9 d2 x; s9 n3 K
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
3 P0 E. z- L; U% n% z6 |eight years after the contest for future testing as technology advances.4 D+ A' P8 {* {+ r0 K
Innocent until proven guilty, shouldn’t it be?# J, K9 a2 x1 E1 U; b
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Sixth, and the last point I would like to make, is that the out-of-+ \/ M- y, c- y
competition drug test is already in effect, which Callaway failed to mention2 _" T2 K. k; D
. As noted in the president of WADA’s press release, drug testing for
F% a5 ], N" S ~4 c0 d q& cOlympians began at least six months before the opening of the London
4 H& ?, o4 j+ e( Z* [Olympics. Furthermore, 107 athletes have been banned from this Olympics for; F& y H( \% U6 M5 b
doping. That may be the reason that “everyone will pass at the Olympic
6 M( u9 C: |5 E1 g% }/ zgames. Hardly anyone fails in competition testing” — those who did dope
+ s/ G& c: d' X& _2 ahave already been caught and sanctioned. Callaway is free to suggest that a5 C) \3 a8 ~) B( A
player could have doped beforehand and fooled the test at the game, but this
' E: n6 ]) Q: y, R {possibility is certainly ruled out for Ye. N0 W F0 O5 m2 n( z
- |+ Z \, Q0 m0 kOver all, even though Callaway did not falsify any data, he did (# C. }, M2 ^+ T* Q0 d! O
intentionally or not) cherry-pick data that, in my view, are far too
0 z. ^+ @, _: y6 ^# {4 Osuggestive to be fair and unbiased. If you want to cover a story of a2 E; D7 S1 I- {1 h( [( X
suspected doping from a scientific point of view, be impartial and provide @4 P6 ~: A+ P: ^
all the facts for the reader to judge. You are entitled to your
$ A7 T. B' J- Y4 j; Ointerpretation of the facts, and the expression thereof in your piece,. ]6 O4 `, v: g' d, ?
explicitly or otherwise, but showing only evidence that favours your% i1 _& M6 o5 m2 E9 J
argument is hardly good science or journalism. Such an article in a journal0 H) I# V7 x* t
such as Nature is not an appropriate example of how scientific research or" R; {' k+ _ O7 e& b: l
reporting should be done. |
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