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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
6 n. ~8 V& E2 `9 O如果是中国长大的,英语能到这种程度真是很不简单。, E3 g \, l, [1 _5 L
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html0 `7 Z0 n2 b1 ^, y8 e; S/ y3 d
; W+ |$ w D2 U, \$ n9 W7 ?! L" AFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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: r3 w# A% d" e- o+ ]4 Q, sIt is a shame to see Nature — which nearly all scientists, including myself
6 T- s; A- r, |1 }+ h) Y, regard as one of the most prestigious and influential physical-science+ }" i j% P }$ {+ ?; b+ K
magazines — publish a thinly veiled biased article like this. Granted, this
$ u( R1 C7 [- c5 A. C2 y6 _9 ^: t; xis not a peer-reviewed scientific article and did not go through the
; n, R: y. g" x# k6 M/ rscrutiny of picking referees. But to serve as a channel for the general
2 @( | r" C7 {: }1 \populace to be in touch with and appreciate science, the authors and editors8 M% {! j. h4 }1 Z9 M$ ]
should at least present the readers with facts within the proper context,2 A( V' F# T& Q! a1 {
which they blatantly failed to do. U8 l1 S3 P- C, z$ E
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First, to identify Ye’s performance increase, Ewen Callaway compared her
8 Z3 g, K0 y9 } @$ DOlympic 400-metre IM time with her performance at the World Championships in
y& d! J$ @' w) a* Z w( y6 K2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
h$ g" \& R. O, d( O) Zanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
% b2 Z) i$ |4 S5 C+ P# dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
5 ]& @$ A0 q) U* V" y* [5 R8 Aimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
. y+ [, W" W+ ydifference between the gold and silver medal, I see no reason for 5.38 s to, d, P% G) m2 }& i0 x( P a
be treated as 7 s.
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/ n7 h8 _# c' f' ~% j& `Second, as previously pointed out, Ye is only 16 years old and her body is+ `0 Z0 a1 w& Y/ d9 U
still developing. Bettering oneself by 5 seconds over two years may seem
, S# i9 K+ k: \0 cimpossible for an adult swimmer, but it certainly happens among youngsters.6 ?2 G* z( k9 P# T0 g
An interview with Australian gold medallist Ian Thorpe revealed that his 400
. ?& D% W: D r% z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
% F" V/ V$ C o2 e3 eFor regular people, including Callaway, it may be hard to imagine what an/ i8 @) @9 g1 Y* B+ d+ O
elite swimmer can achieve as he or she matures and undergoes scientific and3 \! n* b! R B! c! Q' L+ k# I% {' b0 u
persistent training. But jumping to the conclusion that it is “anomalous”
, L/ Q$ r' e: rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.3 n3 K- M1 q! `, H" I2 h& ]' T2 H
H' q0 c! _& }Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
3 V& l0 B" |7 Texample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in7 H; [8 k8 C# A7 P- t$ @2 c
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 Z6 M, ^8 w) p1 E( s9 L
he chose not to push himself too hard and to conserve his energy for later
9 P+ m+ p# L. c9 A/ revents (whether this conforms to the Olympic spirit and the ‘use one’s0 ?/ `7 _9 f7 n6 E" P
best efforts to win a match’ requirement that the Badminton World
1 }6 @ f8 ~, kFederation recently invoked to disqualify four badminton pairs is another
1 K# T" J3 ]$ j# o* _topic worth discussing, though probably not in Nature). Ye, on the other
+ w2 Y9 ?0 ]( i. H5 }- `hand, was trailing behind after the first 300 metres and relied on freestyle
# i# m3 ^- | q, l; `4 c, in which she has an edge, to win the race. Failing to mention this
2 ?9 F* @8 [) s6 Sstrategic difference, as well as the fact that Lochte is 23.25 seconds; k& h1 y! A' U+ X: ^/ I$ p/ j' K$ d
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
7 F# R& L" Y- E X6 D! kfaster than the best man in the same sport, which sounds impossible. Putting$ X3 A, D g) c, C- \
aside the gender argument, I believe this is still a leading question that/ t+ U! l& p8 A$ B4 }* p8 J: M
implies to the reader that there is something fishy going on.0 `0 W0 V2 ]" n& p& g
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Fourth is another example of cherry-picking. In the same event, there are
7 |: C' ]4 Y& F/ {, |- h! q/ Xfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 h+ V. d/ s6 G! }s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) c' j3 n( p0 [! L# @3 V- b: Q), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns. d4 |6 m* }$ a- n n
out, if we are just talking about the last 50 metres in a 400-metre IM,
1 {! B3 E1 i5 [. m& P8 M; Q/ [6 aLochter is not the example I would have used if I were the author. What kind1 @# v7 Y5 _$ A- J& G
of scientific rigorousness is Callaway trying to demonstrate here? Is it6 B' _* O0 v3 U) N: b
logical that if Lochter is the champion, we should assume that he leads in1 z8 W' R. C1 L8 j
every split? That would be a terrible way to teach the public how science
) [# i$ H* N; k6 f2 tworks.
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* _0 z% ~4 R# S* sFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
; H. d) }9 l3 w5 b( n- Limplies that a drug test cannot rule out the possibility of doping. Is this
9 [; T8 J8 P1 E* Ekind of agnosticism what Nature really wants to teach its readers? By that. B" }: ]2 n+ q+ t+ w- [8 o, e6 Q
standard, I estimate that at least half of the peer-reviewed scientific
+ y+ K& F* A/ Z0 M. hpapers in Nature should be retracted. How can one convince the editors and$ @: n* ^, n9 x, ^$ w3 I! |: p$ N
reviewers that their proposed theory works for every possible case? One/ D1 w! w1 f [3 p; T2 ?
cannot. One chooses to apply the theory to typical examples and to1 a6 S' R3 I9 h% h; O2 M
demonstrate that in (hopefully) all scenarios considered, the theory works
. o7 o9 S n+ ^1 K( I( A, ~to a degree, and that that should warrant publication until a counterexample
1 M% m3 a( _ w4 R/ P$ l- qis found. I could imagine that Callaway has a sceptical mind, which is
+ k6 [" s# D0 {& @crucial to scientific thinking, but that would be put to better use if he
% k1 o4 {4 T: d6 P# i: [wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly6 r& G% W+ d" A( m3 l: M, P P
advanced, non-detectable drug that the Chinese have come up with in the6 y* f2 B9 v- ]9 J6 O7 I
past 4 years (they obviously did not have it in Beijing, otherwise why not
7 h: q g- G5 m4 _# B0 puse it and woo the audience at home?), based on data and rational derivation+ m7 Z9 M$ u$ [" ]" R9 Z8 T
. This article, however, can be interpreted as saying that all athletes are- d1 |8 O9 e' U& K% D8 r
doping and the authorities are just not good enough to catch them. That may
7 A- @% O o8 E! b# h# [3 s, e7 ^0 H- |be true, logically, but definitely will not make the case if there is ever a: h" |7 c/ _3 R u+ m' r
hearing by the governing body for water sports, FINA, to determine if Ye3 {! w: {+ f; o
has doped. To ask whether it is possible to obtain a false negative in a
/ r! s7 V- b$ Z2 S3 u' K7 ndrug test looks like a rigged question to me. Of course it is possible:
# h" }7 W. T4 c9 D4 Tother than the athlete taking a drug that the test is not designed to detect. i( P; K0 R4 o! N0 \& Z
, anyone who has taken quantum 101 will tell you that everything is$ j+ `! o( G7 _
probabilistic in nature, and so there is a probability that the drug in an1 M1 W7 {7 a# z. M( h C
athlete’s system could tunnel out right at the moment of the test. A slight Z9 x, D+ v, Y1 Y# d
chance it may be, but should we disregard all test results because of it?) n5 \! p+ @7 X' W/ S
Let’s be practical and reasonable, and accept that the World Anti-Doping
; f, o" W5 M2 \' @! |agency (WADA) is competent at its job. Ye’s urine sample will be stored for. l3 d$ i" s9 t( s O
eight years after the contest for future testing as technology advances.8 k( H9 U2 ?3 W
Innocent until proven guilty, shouldn’t it be?8 b# E2 v* s7 u9 i l. ^8 j8 f
$ O. R, B. b* r) H6 O \7 bSixth, and the last point I would like to make, is that the out-of-
3 w$ M: g. s% n2 V7 Ecompetition drug test is already in effect, which Callaway failed to mention
, Y4 m0 ~" b. W/ L. As noted in the president of WADA’s press release, drug testing for
2 e8 W) B3 ~' P* x1 lOlympians began at least six months before the opening of the London
+ ]' }* [ S8 OOlympics. Furthermore, 107 athletes have been banned from this Olympics for
1 u. u) E+ |5 w* l5 ~; t# wdoping. That may be the reason that “everyone will pass at the Olympic
# Q+ w5 L" h1 n% Zgames. Hardly anyone fails in competition testing” — those who did dope
8 q' \# g: E, h# o% S& t C+ u/ xhave already been caught and sanctioned. Callaway is free to suggest that a3 f+ O- e9 j. e* ^5 G
player could have doped beforehand and fooled the test at the game, but this" q/ F, y- [7 f, |. ]" V/ M/ U. s& E8 Q
possibility is certainly ruled out for Ye.
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/ Z: m4 } a# C1 YOver all, even though Callaway did not falsify any data, he did (' y" |& c# ~+ n; E. f
intentionally or not) cherry-pick data that, in my view, are far too ^' ~- \8 e" R# R
suggestive to be fair and unbiased. If you want to cover a story of a! o: j* j3 _" x
suspected doping from a scientific point of view, be impartial and provide4 }; `* s g- t& x6 y5 C
all the facts for the reader to judge. You are entitled to your
4 k5 `( l8 X' b! w$ Einterpretation of the facts, and the expression thereof in your piece,
3 }$ x. T+ c* M" |5 Yexplicitly or otherwise, but showing only evidence that favours your% O! F9 A9 L) ?& s Z
argument is hardly good science or journalism. Such an article in a journal
# u- G5 W2 A5 p$ q' p( E5 lsuch as Nature is not an appropriate example of how scientific research or# f1 {+ b" e- D" o1 H
reporting should be done. |
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