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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: L- D5 U4 I0 N W3 l/ W- n7 e
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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html( ]5 l. Y0 C9 A1 t3 N) U/ i
- X m( A- d6 V( r3 hFROM LAI JIANG, Department of Chemistry, University of Pennsylvania+ ~6 ]% ^, Z' k0 e9 h% }
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It is a shame to see Nature — which nearly all scientists, including myself$ G) G1 d$ d& q- ^
, regard as one of the most prestigious and influential physical-science" J- G5 e1 `2 v1 j
magazines — publish a thinly veiled biased article like this. Granted, this* Y( [6 O8 b9 c8 `* z' l! w
is not a peer-reviewed scientific article and did not go through the
; L* ~! Z9 |9 c% F8 y3 p. ?scrutiny of picking referees. But to serve as a channel for the general7 _2 P, ~3 q9 s6 D! w4 L U4 X
populace to be in touch with and appreciate science, the authors and editors
( t8 [1 Q$ b$ I) ? Q9 D: E: z; U: bshould at least present the readers with facts within the proper context,' p1 ?8 v" u' M$ g$ {. y5 T/ u
which they blatantly failed to do./ d3 ]7 _. M( e# `
8 I- {7 }9 ]/ r2 {) [. k( wFirst, to identify Ye’s performance increase, Ewen Callaway compared her6 Q; c9 j. u1 i. n
Olympic 400-metre IM time with her performance at the World Championships in
* B3 z+ R0 R* c1 k( O6 |2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “% N: q* [; r5 a
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous6 d( h/ q L8 j4 H; U
personal best was 4:33.79 at the Asian Games in 2010. This leads to an: W5 {7 _1 A. D9 n; Z' ~
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
8 G. k7 i+ t! z7 I: i! m# @/ i( sdifference between the gold and silver medal, I see no reason for 5.38 s to
- T9 e% T; y) O2 `7 Xbe treated as 7 s.4 b3 `6 |* C" E, n. t
4 w1 Y/ m; W* ?+ i- e" g7 Z$ Q1 wSecond, as previously pointed out, Ye is only 16 years old and her body is
$ q$ e+ T! c# L t U4 X+ Wstill developing. Bettering oneself by 5 seconds over two years may seem3 E& }( s* n% H$ p* R; {
impossible for an adult swimmer, but it certainly happens among youngsters./ @. E$ s5 z$ {
An interview with Australian gold medallist Ian Thorpe revealed that his 400. ~ q- N/ e9 W" g" M) ~
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.; R( Y. @6 J( T2 L# O7 @
For regular people, including Callaway, it may be hard to imagine what an: {" u E3 o) s6 y- e
elite swimmer can achieve as he or she matures and undergoes scientific and! D) B, y( j- w' O% E1 a. i. k/ F
persistent training. But jumping to the conclusion that it is “anomalous”5 h/ G& G/ _ O$ n8 |. b
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound." p3 m L& ~7 Y# _" C5 C
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook+ l* w/ k( e( |
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in& j+ u! ?1 L% b# s5 W) f5 X7 k2 A
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
4 B6 K4 x, g& r5 a3 V: nhe chose not to push himself too hard and to conserve his energy for later5 R' F) ~. o+ R( P
events (whether this conforms to the Olympic spirit and the ‘use one’s
8 N/ j t x& E. Q% r( e8 h% H7 h3 ubest efforts to win a match’ requirement that the Badminton World
3 ^$ a5 S: w& O1 Q F- jFederation recently invoked to disqualify four badminton pairs is another
1 y7 [! B; j2 W$ P( ^2 ^" vtopic worth discussing, though probably not in Nature). Ye, on the other
6 Z1 P8 B4 V; x; vhand, was trailing behind after the first 300 metres and relied on freestyle! L" T5 e |4 Z
, in which she has an edge, to win the race. Failing to mention this
6 R9 t- d% g/ C+ Y3 @, I: l* }strategic difference, as well as the fact that Lochte is 23.25 seconds$ U9 ^4 h6 T! W1 p4 n! P: g' {
faster (4:05.18) than Ye overall, creates the illusion that a woman swam+ Y7 ?! r* [8 @4 c
faster than the best man in the same sport, which sounds impossible. Putting
& E6 V2 }" s7 p/ E; easide the gender argument, I believe this is still a leading question that- w1 T# m! |4 E. M k; t
implies 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) d* N- R% n# h* q5 e
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
/ ~1 K+ O; j7 v8 @9 Os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
& s! S' m; V0 f' p$ L), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns4 m- K [& y# N) h
out, if we are just talking about the last 50 metres in a 400-metre IM,
) t/ F" ^* R5 p' a" P8 `Lochter is not the example I would have used if I were the author. What kind5 C4 K. z7 C% N) e0 X$ q
of scientific rigorousness is Callaway trying to demonstrate here? Is it: m$ k2 P8 j. _9 C
logical that if Lochter is the champion, we should assume that he leads in3 n1 n; T9 a) g% y- r2 P7 o
every split? That would be a terrible way to teach the public how science
+ g- g& E4 e$ o6 \. c2 `/ pworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
* e: \( p4 ]5 himplies that a drug test cannot rule out the possibility of doping. Is this, V9 t! [) E$ B/ c
kind of agnosticism what Nature really wants to teach its readers? By that2 e6 ] \+ H# Z$ w
standard, I estimate that at least half of the peer-reviewed scientific
9 h: ]" B4 n( w( w# dpapers in Nature should be retracted. How can one convince the editors and8 E6 Q" M7 F0 v* p
reviewers that their proposed theory works for every possible case? One6 i( N' G7 ]( G5 B$ M6 g
cannot. One chooses to apply the theory to typical examples and to
6 s6 S/ l6 b" R$ L, {demonstrate that in (hopefully) all scenarios considered, the theory works7 J( x, ?% L0 Y6 b% p
to a degree, and that that should warrant publication until a counterexample
3 i: C- L, K$ [4 K$ _is found. I could imagine that Callaway has a sceptical mind, which is- i3 ` I/ @% ?% X: b
crucial to scientific thinking, but that would be put to better use if he
- V! }9 u$ M$ ?- Qwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly$ A$ q! r9 g" l9 ~* l J8 t
advanced, non-detectable drug that the Chinese have come up with in the
. x, d2 o6 R* I% b0 N/ rpast 4 years (they obviously did not have it in Beijing, otherwise why not
6 l- j3 M% v: D+ o) ruse it and woo the audience at home?), based on data and rational derivation
6 b4 \; @/ a# ^" X% l5 j P* }. This article, however, can be interpreted as saying that all athletes are
' G. k3 _0 p5 C; W% X% Odoping and the authorities are just not good enough to catch them. That may
' l- _2 ~, a9 U: Y2 e* @, @: Y; [8 xbe true, logically, but definitely will not make the case if there is ever a) U, ]+ a4 g3 B2 |: k/ q
hearing by the governing body for water sports, FINA, to determine if Ye
, p5 z* m$ L$ d9 Z' Z+ I9 jhas doped. To ask whether it is possible to obtain a false negative in a) ]1 ~4 A2 X: y1 i" R! E
drug test looks like a rigged question to me. Of course it is possible:% J' b/ [* [" @7 p! n% u
other than the athlete taking a drug that the test is not designed to detect2 i7 ?6 z: r/ T! o1 A) B
, anyone who has taken quantum 101 will tell you that everything is" w% y; I9 z$ s: c m% z
probabilistic in nature, and so there is a probability that the drug in an
0 e7 G( q3 i* k; o" `7 m6 \2 fathlete’s system could tunnel out right at the moment of the test. A slight
* g$ M! R2 | s, n2 F& Ychance it may be, but should we disregard all test results because of it?
' a* I7 S5 n# `9 s, [9 cLet’s be practical and reasonable, and accept that the World Anti-Doping
& Q( E0 l1 S' D& @) l" Sagency (WADA) is competent at its job. Ye’s urine sample will be stored for
! i% ^: }7 _! m- ?( D% W* ~eight years after the contest for future testing as technology advances.
5 X: c3 f* }9 f9 c4 G2 MInnocent until proven guilty, shouldn’t it be?
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# R: F5 A: \1 q9 F$ z6 HSixth, and the last point I would like to make, is that the out-of-
* H D: W; g* T8 J. C0 a1 A1 a- icompetition drug test is already in effect, which Callaway failed to mention6 {* B& [* ?3 p+ t& W1 T u
. As noted in the president of WADA’s press release, drug testing for
: O% K/ W# Z, D& EOlympians began at least six months before the opening of the London
* [" z; U$ G& a- J8 c" FOlympics. Furthermore, 107 athletes have been banned from this Olympics for
3 [$ y! O5 a) }" r$ jdoping. That may be the reason that “everyone will pass at the Olympic C& f; F) ^) E2 n, a0 Z* B
games. Hardly anyone fails in competition testing” — those who did dope, C/ r' g# ]2 z8 q
have already been caught and sanctioned. Callaway is free to suggest that a5 }& X. B7 \2 |
player could have doped beforehand and fooled the test at the game, but this
+ Q L M$ U# Y7 `, Qpossibility is certainly ruled out for Ye.
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( Q9 J' K: W$ `1 B. D, M' m t& D5 nOver all, even though Callaway did not falsify any data, he did (
% u9 r! E+ j4 ^3 ~& g# s9 p; Q' c' {intentionally or not) cherry-pick data that, in my view, are far too
& m+ f, {: ]* E' msuggestive to be fair and unbiased. If you want to cover a story of a
5 s5 }# t2 E" s# S1 S& |suspected doping from a scientific point of view, be impartial and provide
' \1 h) Z( S; b) Nall the facts for the reader to judge. You are entitled to your- W g; V$ O! F1 t& g- U
interpretation of the facts, and the expression thereof in your piece,+ y- f' B: K3 h& ~
explicitly or otherwise, but showing only evidence that favours your8 ^( M4 o# N1 h2 L
argument is hardly good science or journalism. Such an article in a journal: S! ~# a/ y7 Z1 [9 u: |
such as Nature is not an appropriate example of how scientific research or
4 \- m, |% P) S$ }+ q1 \reporting should be done. |
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