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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
; f: e7 s% h% L3 E# Q如果是中国长大的,英语能到这种程度真是很不简单。4 M" o2 M" W) V. Z3 Z
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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: }/ \4 R. P# V' I1 H kFROM LAI JIANG, Department of Chemistry, University of Pennsylvania9 n8 ` N$ [) M
. F! u* E* N/ |" ?It is a shame to see Nature — which nearly all scientists, including myself
. D4 R- [5 i8 i2 z, regard as one of the most prestigious and influential physical-science/ x7 L. y f, z, ~& ~6 S: w+ c
magazines — publish a thinly veiled biased article like this. Granted, this
9 W2 t3 b; Q' _ R4 uis not a peer-reviewed scientific article and did not go through the. o; h- n- ^( j, S9 g' h
scrutiny of picking referees. But to serve as a channel for the general3 b1 h; T. {* }" E, @
populace to be in touch with and appreciate science, the authors and editors- Y% T ?" N+ {$ p6 p
should at least present the readers with facts within the proper context,
( \1 C4 P4 _3 A; F$ Y, ywhich they blatantly failed to do.
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0 H- q) t" L; y) NFirst, to identify Ye’s performance increase, Ewen Callaway compared her
3 X" z$ k5 ^6 d# @$ E' |Olympic 400-metre IM time with her performance at the World Championships in, t# i$ C; X6 w( Y# a- U
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
7 h% h! z: V- M. qanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous8 E; w1 O4 n3 p0 i7 `) U
personal best was 4:33.79 at the Asian Games in 2010. This leads to an, @6 G" t" \& ^9 V8 @9 F" _' y4 v
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
/ ?# r5 Q, p* b9 T$ X- d3 K8 p3 Cdifference between the gold and silver medal, I see no reason for 5.38 s to0 l# y$ L! h& {6 t T. `
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is5 p- P8 G. k4 k# b7 C8 |! E! h
still developing. Bettering oneself by 5 seconds over two years may seem
$ P) G& M& n1 A- {% M# U% l5 Pimpossible for an adult swimmer, but it certainly happens among youngsters.
Y, M- }9 e: [2 D' v+ W8 s* HAn interview with Australian gold medallist Ian Thorpe revealed that his 400* n/ [3 Z5 D d! t `! c+ A
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
. `# S& w% @. U7 X% d7 V e8 ^$ CFor regular people, including Callaway, it may be hard to imagine what an: C+ T2 m7 m; Q1 O
elite swimmer can achieve as he or she matures and undergoes scientific and
) ~: W/ l$ _6 d, [persistent training. But jumping to the conclusion that it is “anomalous”
, P& \: i! ?5 Lbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.7 ]) q( \# K1 o6 f( s
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
* s4 H/ ]9 F7 p; N$ ]' v- P* b$ jexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
A- [3 H( N, v1 uthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 m& | E5 I1 D6 f, R5 Lhe chose not to push himself too hard and to conserve his energy for later9 C) ?$ i* y6 O9 ]
events (whether this conforms to the Olympic spirit and the ‘use one’s
/ X9 k4 h, U0 c9 C, W7 p9 F, {best efforts to win a match’ requirement that the Badminton World
& W4 Q4 _3 ]# w0 B9 uFederation recently invoked to disqualify four badminton pairs is another
7 D9 _( w3 ^: J+ v" Utopic worth discussing, though probably not in Nature). Ye, on the other4 T$ F ~9 ~5 P5 F4 ^
hand, was trailing behind after the first 300 metres and relied on freestyle- h7 M" V1 b6 G( W& s
, in which she has an edge, to win the race. Failing to mention this' Q1 V- }+ l# J' v$ ]( s
strategic difference, as well as the fact that Lochte is 23.25 seconds; K% y4 }- z; s& L
faster (4:05.18) than Ye overall, creates the illusion that a woman swam7 b6 l$ Q# Y9 K6 G
faster than the best man in the same sport, which sounds impossible. Putting, w' ?- N- Y3 \' D+ |
aside the gender argument, I believe this is still a leading question that
% a: }) q' Z: V) i4 {. c4 Limplies 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* y: T) o8 p( |/ W
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
s- B+ ?1 ], e+ n2 q7 Ts) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s/ n$ X/ g$ r- T! w/ f: `# v
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns. K0 E) u$ j5 m0 F& e- L
out, if we are just talking about the last 50 metres in a 400-metre IM,% O+ y j v. z, N1 i+ L1 p& H
Lochter is not the example I would have used if I were the author. What kind
0 f* i- T P0 R* Cof scientific rigorousness is Callaway trying to demonstrate here? Is it
. j3 k0 l2 m1 c' R9 Y1 P) klogical that if Lochter is the champion, we should assume that he leads in
: \. F# ?5 D) R0 c1 g J _every split? That would be a terrible way to teach the public how science
$ x, A. o7 D7 U+ |) Y# W, Q( S0 `works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
8 [7 a9 P! \( k# ]6 E9 Pimplies that a drug test cannot rule out the possibility of doping. Is this p6 o" O4 Q9 w7 {. s4 V0 t
kind of agnosticism what Nature really wants to teach its readers? By that3 R ?. M! Q' q$ M/ N: f8 T6 N0 n
standard, I estimate that at least half of the peer-reviewed scientific/ o: A( a# k4 S. `
papers in Nature should be retracted. How can one convince the editors and, o9 A( e* y0 B1 X+ A# ~
reviewers that their proposed theory works for every possible case? One. J2 n" m; H- ~& q) H; A8 A
cannot. One chooses to apply the theory to typical examples and to
* Q$ `3 Q4 j$ F7 X1 M* \demonstrate that in (hopefully) all scenarios considered, the theory works! {/ _- k7 }2 Z" m5 B" @; |& s
to a degree, and that that should warrant publication until a counterexample
/ K- ^: N, C( ?9 M( ]is found. I could imagine that Callaway has a sceptical mind, which is
9 G1 {) H5 y" g% ecrucial to scientific thinking, but that would be put to better use if he
$ p# ?# {. z/ [wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
; C$ Z- k* L7 s5 I2 b% X$ i* Sadvanced, non-detectable drug that the Chinese have come up with in the9 e4 b3 [2 j. E8 n8 l y
past 4 years (they obviously did not have it in Beijing, otherwise why not4 p+ Q2 r% F3 h1 ~/ e
use it and woo the audience at home?), based on data and rational derivation8 k$ W+ s/ p! z5 k8 [
. This article, however, can be interpreted as saying that all athletes are
0 W1 i3 E4 f7 _* R$ Gdoping and the authorities are just not good enough to catch them. That may7 o: G* ?$ f* k9 G( U0 w3 `
be true, logically, but definitely will not make the case if there is ever a
( \! S( c7 `/ G9 t4 ^hearing by the governing body for water sports, FINA, to determine if Ye9 K8 M% P" s( D$ T
has doped. To ask whether it is possible to obtain a false negative in a
; L! V9 y& L7 Q M, X3 ~. Qdrug test looks like a rigged question to me. Of course it is possible:; ~8 Q2 w e3 ]4 }5 g
other than the athlete taking a drug that the test is not designed to detect
3 W9 O6 y) N* ^4 _, anyone who has taken quantum 101 will tell you that everything is
4 z7 i7 U+ I3 u( h7 wprobabilistic in nature, and so there is a probability that the drug in an
6 z' N8 q) J( m; F4 o5 xathlete’s system could tunnel out right at the moment of the test. A slight
, p5 o1 l& N3 c3 e! N0 m! a6 nchance it may be, but should we disregard all test results because of it? A8 B( ~7 d1 N
Let’s be practical and reasonable, and accept that the World Anti-Doping
- v' `. c5 A/ j9 ^agency (WADA) is competent at its job. Ye’s urine sample will be stored for* _4 L, `3 W; L4 A2 A
eight years after the contest for future testing as technology advances./ {2 A- J5 J2 P- K( g7 h0 g+ Z6 f; U
Innocent until proven guilty, shouldn’t it be?9 b, h( M- t9 i2 d& _8 q: X
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Sixth, and the last point I would like to make, is that the out-of-
2 z# c- m! K: r; ccompetition drug test is already in effect, which Callaway failed to mention
( \( O; |: S4 h7 |: u \. As noted in the president of WADA’s press release, drug testing for" p; \4 K+ D- r0 T) V
Olympians began at least six months before the opening of the London# p! G0 J% k! P+ K+ q. N4 Y
Olympics. Furthermore, 107 athletes have been banned from this Olympics for8 m" [1 [8 f& g" u- X; j% i( _
doping. That may be the reason that “everyone will pass at the Olympic3 ?. X r+ o* b7 q8 L3 k. [* m
games. Hardly anyone fails in competition testing” — those who did dope% }) o% x/ y# p4 O
have already been caught and sanctioned. Callaway is free to suggest that a
% O4 W. D# b; O; lplayer could have doped beforehand and fooled the test at the game, but this
) C8 L/ s, c# ^) g/ l5 a- v9 k3 V+ Qpossibility is certainly ruled out for Ye.8 ? X1 I: z+ X
3 n9 p7 a% ^" G2 iOver all, even though Callaway did not falsify any data, he did (
4 o3 j/ k, B: h5 a- R2 Q* Zintentionally or not) cherry-pick data that, in my view, are far too9 |' C% k; Y S0 Q
suggestive to be fair and unbiased. If you want to cover a story of a
$ R7 c# P% d, {) [1 N7 J, F L/ Zsuspected doping from a scientific point of view, be impartial and provide
5 J# @: [& V: n8 |" k" |" _all the facts for the reader to judge. You are entitled to your9 y- c3 v0 ?( |* j& v( _3 V
interpretation of the facts, and the expression thereof in your piece,
0 g: O9 p9 ~: Y& s$ f4 Aexplicitly or otherwise, but showing only evidence that favours your9 a# ^ k' H9 m
argument is hardly good science or journalism. Such an article in a journal
4 w5 j! c* a/ L. Y& Zsuch as Nature is not an appropriate example of how scientific research or
$ V3 G5 @. _3 a' K/ zreporting should be done. |
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