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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, P7 \2 Z5 F. t& T& S) @: X5 n
如果是中国长大的,英语能到这种程度真是很不简单。 K' R: u8 F% u& d1 x: P
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html4 t: x. j! m( r# @
0 J0 c7 i9 R: s% z8 z9 g/ ]+ sFROM LAI JIANG, Department of Chemistry, University of Pennsylvania U3 j5 p2 H, ?
( B8 z5 K4 O. O1 @8 ]It is a shame to see Nature — which nearly all scientists, including myself# }) X% o3 W% I- ~/ e6 g3 t( g
, regard as one of the most prestigious and influential physical-science
3 d, S) u7 q1 ^4 k5 e+ P/ jmagazines — publish a thinly veiled biased article like this. Granted, this
# C0 H# v% v. G* y: Dis not a peer-reviewed scientific article and did not go through the
( |* e7 r! V: \3 P. kscrutiny of picking referees. But to serve as a channel for the general! Y- k. e2 j/ p7 D8 @
populace to be in touch with and appreciate science, the authors and editors" q4 Q. J3 z/ y5 q5 X" s
should at least present the readers with facts within the proper context,! F7 D, @$ [/ K( ^; I! j
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her( f- ?! t r+ E0 x" y
Olympic 400-metre IM time with her performance at the World Championships in
, F, r0 M/ p' t+ y! P8 W: d2 ?+ o2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “) B0 g3 \4 i3 W8 i- C) R k& a6 d
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
4 x) m; R" _( H. t* wpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an! M. G5 Q. j; Z, o' g; i
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the' k2 }/ p% E; ? a3 [
difference between the gold and silver medal, I see no reason for 5.38 s to
7 t& {: t8 b4 e! r+ w' }9 |, T7 fbe treated as 7 s.( I4 K3 j1 b4 F! s. U; x
) h8 o. Y4 j9 H2 ~3 _: nSecond, as previously pointed out, Ye is only 16 years old and her body is
, K( b. l" n1 q- e: Kstill developing. Bettering oneself by 5 seconds over two years may seem
* l6 j* C" Z. \impossible for an adult swimmer, but it certainly happens among youngsters., |/ R X! [+ W
An interview with Australian gold medallist Ian Thorpe revealed that his 400
- P- A& s8 o0 d! b9 ?; D. ]! g5 r+ d-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 F' e9 R* {- ^2 a8 EFor regular people, including Callaway, it may be hard to imagine what an1 Z w l$ T1 V9 `" a& J
elite swimmer can achieve as he or she matures and undergoes scientific and
5 q* H% w) C6 S$ Mpersistent training. But jumping to the conclusion that it is “anomalous”0 \: R" S. H1 y8 R ]/ d
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook$ u; Z) e, ?* a- U, ~: c
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in* D j; Y% d: a) K
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
@, n5 o/ G' q1 x8 X! b; z" X8 g. khe chose not to push himself too hard and to conserve his energy for later
) \. }: g$ f* n' xevents (whether this conforms to the Olympic spirit and the ‘use one’s
7 h0 r! A% q% S1 t, ^& @% Mbest efforts to win a match’ requirement that the Badminton World9 D0 n1 j* E/ K0 I
Federation recently invoked to disqualify four badminton pairs is another
* z( I* m6 X6 i3 i8 h4 z qtopic worth discussing, though probably not in Nature). Ye, on the other7 B% t1 D; \7 L2 ~- y& {
hand, was trailing behind after the first 300 metres and relied on freestyle- D! M1 E8 n' O
, in which she has an edge, to win the race. Failing to mention this
+ t/ Y. y% e/ x. X8 dstrategic difference, as well as the fact that Lochte is 23.25 seconds/ l6 _4 S0 [3 K
faster (4:05.18) than Ye overall, creates the illusion that a woman swam$ p% P2 ~7 {3 r
faster than the best man in the same sport, which sounds impossible. Putting8 E) R3 @9 N7 @, ]
aside the gender argument, I believe this is still a leading question that; `5 E5 _! B* B# O+ H4 n4 d* l
implies to the reader that there is something fishy going on.7 G+ I6 ` _. I& X: U
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Fourth is another example of cherry-picking. In the same event, there are
# O* `+ a: Z, E7 x7 m( p" u: ?1 O2 Lfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
5 d3 y/ o& z# ~; m9 E! Cs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
6 e. T& l/ p6 f# J- _), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
2 C2 O( O/ ]- s1 q, M+ @out, if we are just talking about the last 50 metres in a 400-metre IM,: M) b, F* |7 n3 O' G$ `
Lochter is not the example I would have used if I were the author. What kind0 [! S- Y$ {$ E. @
of scientific rigorousness is Callaway trying to demonstrate here? Is it+ p4 g( j, p/ e: A0 V
logical that if Lochter is the champion, we should assume that he leads in% ~' E: G5 m0 s% k& M" A
every split? That would be a terrible way to teach the public how science
6 [& ^$ t' ~. H# Rworks.0 v. E- Y9 k6 d" }& z3 y
8 [. z$ `) v, M' @5 uFifth is the issue I oppose the most. Callaway quotes Ross Tucker and$ V" I; G( ~! E! [8 z" |, K; p- c. |
implies that a drug test cannot rule out the possibility of doping. Is this' F! B6 j* N# M/ d7 O
kind of agnosticism what Nature really wants to teach its readers? By that
2 {, F2 K) {4 Kstandard, I estimate that at least half of the peer-reviewed scientific# R, Y/ \- i% R& ?7 n
papers in Nature should be retracted. How can one convince the editors and8 ^1 m! K& f0 \! m& q2 t1 a
reviewers that their proposed theory works for every possible case? One
/ U) P' y4 d: C l xcannot. One chooses to apply the theory to typical examples and to
' `4 I. _* F- _7 y0 p1 Rdemonstrate that in (hopefully) all scenarios considered, the theory works, ?! @4 S# ]3 O+ T* S/ y
to a degree, and that that should warrant publication until a counterexample6 G: Z2 @5 X, A1 D+ M
is found. I could imagine that Callaway has a sceptical mind, which is
# G) i) _5 c2 \3 Q1 q& C, F4 P7 W. Dcrucial to scientific thinking, but that would be put to better use if he
, c. y; G) l6 M7 h. ^9 q& nwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
% p" D/ q& n. o3 w$ Gadvanced, non-detectable drug that the Chinese have come up with in the; Z4 Y2 Z, \2 x, [8 J8 i
past 4 years (they obviously did not have it in Beijing, otherwise why not
7 F5 `+ |2 f6 d( }. f1 R C% e1 Buse it and woo the audience at home?), based on data and rational derivation6 e5 N8 X9 Y1 P W5 {/ }" q$ R
. This article, however, can be interpreted as saying that all athletes are
' W9 ]! E. x/ Y5 kdoping and the authorities are just not good enough to catch them. That may* q* \4 m0 f' v! }. p6 y* h
be true, logically, but definitely will not make the case if there is ever a
4 R. k# B' F" J; F% r$ R, L. I2 Rhearing by the governing body for water sports, FINA, to determine if Ye: O S- ~# m$ E8 A3 h
has doped. To ask whether it is possible to obtain a false negative in a
8 p% V' F, B% l5 Tdrug test looks like a rigged question to me. Of course it is possible:
2 O3 e7 u' W: q- h k9 r% x; wother than the athlete taking a drug that the test is not designed to detect
+ y9 Q2 T: G% r9 h2 i. t, anyone who has taken quantum 101 will tell you that everything is% g* }; Q$ V0 m5 v7 ]' P
probabilistic in nature, and so there is a probability that the drug in an
. h* Z1 E9 m' R4 e/ D; D8 v" Jathlete’s system could tunnel out right at the moment of the test. A slight
/ k7 x4 v. ~8 z3 O( zchance it may be, but should we disregard all test results because of it?
3 c' c v- j. U: o/ I' P. tLet’s be practical and reasonable, and accept that the World Anti-Doping% d8 d6 p+ h8 |7 z* T
agency (WADA) is competent at its job. Ye’s urine sample will be stored for; Q3 r% n, Q9 {( j' ~- @4 i
eight years after the contest for future testing as technology advances.. j0 _4 G1 Y2 {! d: p
Innocent until proven guilty, shouldn’t it be?9 C4 O9 Q5 H, x' S$ B! U
D+ ~! m7 T; M$ T, {Sixth, and the last point I would like to make, is that the out-of-
$ n' J5 G" \' C( R/ M9 k. S. N6 bcompetition drug test is already in effect, which Callaway failed to mention! q4 E9 X1 X# `$ Z0 h5 B1 p% O
. As noted in the president of WADA’s press release, drug testing for
7 J% c0 W# C0 q# P2 GOlympians began at least six months before the opening of the London
1 }. q; s* O4 J' LOlympics. Furthermore, 107 athletes have been banned from this Olympics for
" \& C4 F2 r: `2 k! R( udoping. That may be the reason that “everyone will pass at the Olympic
# n" C" k3 p9 T4 Jgames. Hardly anyone fails in competition testing” — those who did dope
9 Q2 x4 H2 |4 u& bhave already been caught and sanctioned. Callaway is free to suggest that a
9 U8 A+ E& N- z% S5 y: g ]player could have doped beforehand and fooled the test at the game, but this
! `/ }2 b" N0 s) s: Wpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
! o* k/ c" B* _3 O0 v6 Mintentionally or not) cherry-pick data that, in my view, are far too3 C8 R( v( |1 D
suggestive to be fair and unbiased. If you want to cover a story of a
5 M1 `- ^& Y$ A, |0 ]) osuspected doping from a scientific point of view, be impartial and provide
% Y5 {; `9 k) D3 {# c; w5 O7 E9 Aall the facts for the reader to judge. You are entitled to your
9 n, r) h- x6 S' |# ?; hinterpretation of the facts, and the expression thereof in your piece,
2 f) [0 c, x; f/ G7 cexplicitly or otherwise, but showing only evidence that favours your5 p$ T: X. Q1 [& Y0 x
argument is hardly good science or journalism. Such an article in a journal2 j# [% l3 O) u+ @. C: G
such as Nature is not an appropriate example of how scientific research or
7 f! Z; K% O4 M6 g7 q$ H. S) p8 Q) Sreporting should be done. |
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