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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 h; X8 z/ M; j/ P
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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+ O# T/ `' v! m- Ehttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html4 F6 h' m& G" c# I. ~1 }0 t! d
% g D; W% [8 d* lFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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5 A* v$ S K( B! q h2 `It is a shame to see Nature — which nearly all scientists, including myself4 |/ ^6 r( R, A& U
, regard as one of the most prestigious and influential physical-science' g; F) V1 x$ n
magazines — publish a thinly veiled biased article like this. Granted, this
# X) n( p4 e$ R% Y& Qis not a peer-reviewed scientific article and did not go through the
5 j( f& c1 J. Z4 N; {scrutiny of picking referees. But to serve as a channel for the general
" U4 l& I2 `" vpopulace to be in touch with and appreciate science, the authors and editors% _* i) w6 ?" s+ W2 g( `
should at least present the readers with facts within the proper context,1 K" {+ d( ]7 P+ d/ x
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her3 z) y" r E1 A3 A5 m& a" O. U
Olympic 400-metre IM time with her performance at the World Championships in& W& h* O- s1 k
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
' Y, J- \. T& k) w8 R1 }anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous+ Q% [: b- f, p
personal best was 4:33.79 at the Asian Games in 2010. This leads to an9 Q9 @- n5 x @- \
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the: @# t5 D! v* [
difference between the gold and silver medal, I see no reason for 5.38 s to9 K" Q7 L! I4 Y& N
be treated as 7 s.
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( O( P2 M) y5 |7 l, @Second, as previously pointed out, Ye is only 16 years old and her body is
! W4 z8 {8 j' A6 X+ j8 }& ?' Tstill developing. Bettering oneself by 5 seconds over two years may seem# a* h J" s% d# m* M9 D
impossible for an adult swimmer, but it certainly happens among youngsters., `- r; V* \, G) b0 B5 O
An interview with Australian gold medallist Ian Thorpe revealed that his 400) z4 `4 H( Y5 v
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
% {( c6 {2 X8 T8 J2 |For regular people, including Callaway, it may be hard to imagine what an
$ z. H+ ~8 q& m9 _$ \; N( Celite swimmer can achieve as he or she matures and undergoes scientific and
5 L v2 l) ]* \! ^persistent training. But jumping to the conclusion that it is “anomalous”
8 l2 B' Q4 M/ k0 d# A3 @: k& _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: @, x8 E- T, G* `+ ]
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in8 x/ Z2 ?1 X5 Q) X& y2 C7 k: o6 d5 [0 i
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
& r( O1 H4 ^8 N% R/ b8 she chose not to push himself too hard and to conserve his energy for later+ B$ ^9 v! U' j' O3 @
events (whether this conforms to the Olympic spirit and the ‘use one’s% z& m0 v' N0 H- @: B$ S2 w. J
best efforts to win a match’ requirement that the Badminton World
) O& h6 K; w/ f9 Z/ hFederation recently invoked to disqualify four badminton pairs is another' E/ F8 O4 P5 B% X; m1 O0 ~% X
topic worth discussing, though probably not in Nature). Ye, on the other
4 x3 X6 o% H- k# q) B5 I! xhand, was trailing behind after the first 300 metres and relied on freestyle2 C) R" n5 n4 j* C3 R. |6 z
, in which she has an edge, to win the race. Failing to mention this
8 P* w: L1 ]# z, P! Ustrategic difference, as well as the fact that Lochte is 23.25 seconds
c! W; ?, E! F/ b3 @4 I! jfaster (4:05.18) than Ye overall, creates the illusion that a woman swam( b F) ^4 j8 b, ?
faster than the best man in the same sport, which sounds impossible. Putting9 \' D- k8 p. g+ Y+ d% U
aside the gender argument, I believe this is still a leading question that. ~( G5 P" S1 z9 _8 X
implies to the reader that there is something fishy going on.
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9 m7 M$ }! K& A* J1 n) {- l" N2 {Fourth is another example of cherry-picking. In the same event, there are( Q6 j7 D4 N* B8 \% r3 A" o
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
! `: r6 N) i z' os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
: J2 Y% T3 L6 |), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
5 |- N& O! y- v) `$ _out, if we are just talking about the last 50 metres in a 400-metre IM,
6 q7 X* X( d O" l, B) y: mLochter is not the example I would have used if I were the author. What kind! J+ Q( H# Y, t x" \! _
of scientific rigorousness is Callaway trying to demonstrate here? Is it
( g$ \4 [' s# D7 Y/ G4 k0 Xlogical that if Lochter is the champion, we should assume that he leads in
* Y+ m. Q) @- B8 Zevery split? That would be a terrible way to teach the public how science
; Q8 f7 L4 l, G$ sworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
* f, C0 T& T( a% @! V1 limplies that a drug test cannot rule out the possibility of doping. Is this
1 v2 ]% U: N6 m- L7 G6 s1 w# Pkind of agnosticism what Nature really wants to teach its readers? By that$ [' x6 C8 Z6 e# I% R- [" v
standard, I estimate that at least half of the peer-reviewed scientific2 D) J" n% y6 B: G5 M- r* E
papers in Nature should be retracted. How can one convince the editors and: H' q# u4 S6 d& ~: w
reviewers that their proposed theory works for every possible case? One
) w: w* m7 M7 j1 o0 G0 acannot. One chooses to apply the theory to typical examples and to. V' f7 a) ?! T, p% k1 V: S
demonstrate that in (hopefully) all scenarios considered, the theory works* T, Y4 J0 D- E
to a degree, and that that should warrant publication until a counterexample
1 ^: t+ g# w. f% |$ Vis found. I could imagine that Callaway has a sceptical mind, which is, C0 |- X! r( a! s
crucial to scientific thinking, but that would be put to better use if he
) T" i$ t% u0 ?wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly0 D$ W) K+ x# H6 Y6 C2 a; A
advanced, non-detectable drug that the Chinese have come up with in the- v! k( x8 x0 l5 W# }) e7 G. H
past 4 years (they obviously did not have it in Beijing, otherwise why not
! x& k- d& h# j2 F1 j uuse it and woo the audience at home?), based on data and rational derivation* ^6 H2 {! ^# d6 {
. This article, however, can be interpreted as saying that all athletes are
$ m# e6 I \0 j+ X/ S$ adoping and the authorities are just not good enough to catch them. That may, w; L# r( y2 r9 j! B
be true, logically, but definitely will not make the case if there is ever a6 y5 O# I+ X. a; J
hearing by the governing body for water sports, FINA, to determine if Ye
; f& \: q& H6 V' E- |has doped. To ask whether it is possible to obtain a false negative in a! H. S; j1 {5 ~' `
drug test looks like a rigged question to me. Of course it is possible:
& Z9 d+ l [8 T( @6 A" Sother than the athlete taking a drug that the test is not designed to detect
+ l$ e4 w i, A8 c; w8 }# i5 |* l, anyone who has taken quantum 101 will tell you that everything is
5 A! J% G4 m1 X2 Q% o" iprobabilistic in nature, and so there is a probability that the drug in an: p0 s& I9 B' k8 m
athlete’s system could tunnel out right at the moment of the test. A slight: n* L- i$ t" q* k8 L7 L7 L
chance it may be, but should we disregard all test results because of it?4 j5 r0 ~+ t. u4 ^' C
Let’s be practical and reasonable, and accept that the World Anti-Doping0 q+ m: Q* X( Z6 N
agency (WADA) is competent at its job. Ye’s urine sample will be stored for4 U( o2 S& y% Y" C2 I6 _ i" d
eight years after the contest for future testing as technology advances.
: m3 p- C! n s6 V2 ]Innocent until proven guilty, shouldn’t it be?& p; t( H* Q" i2 h
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Sixth, and the last point I would like to make, is that the out-of-7 I% C1 h! y& t9 U% c3 b5 K; l
competition drug test is already in effect, which Callaway failed to mention6 N( h1 s' C- f/ k& B
. As noted in the president of WADA’s press release, drug testing for1 M6 Y) @# v A* m( j
Olympians began at least six months before the opening of the London5 W% T9 `. ?, n% g9 }
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
/ @5 N D- E+ v9 Kdoping. That may be the reason that “everyone will pass at the Olympic+ ]4 V, t4 I9 P/ X9 R/ c
games. Hardly anyone fails in competition testing” — those who did dope u$ \( ~! y! G5 O" K6 w
have already been caught and sanctioned. Callaway is free to suggest that a
2 ^: @/ w( p0 B, n0 Fplayer could have doped beforehand and fooled the test at the game, but this5 B) |' M: d1 C
possibility is certainly ruled out for Ye.: e5 s. ~1 j$ K
: H9 \; I2 v1 VOver all, even though Callaway did not falsify any data, he did ( {. v4 X2 x2 M9 R9 K; q
intentionally or not) cherry-pick data that, in my view, are far too/ |% i# I2 h# l# b
suggestive to be fair and unbiased. If you want to cover a story of a3 J+ ~) r. i% M
suspected doping from a scientific point of view, be impartial and provide
" L$ t8 [( N& Iall the facts for the reader to judge. You are entitled to your# }1 {8 h8 k4 H+ c& ^4 {
interpretation of the facts, and the expression thereof in your piece,
% {; f; a/ i& X3 M& v' a Sexplicitly or otherwise, but showing only evidence that favours your
* k2 f# Q M* r3 sargument is hardly good science or journalism. Such an article in a journal7 ]- s; M) h+ G4 _& t
such as Nature is not an appropriate example of how scientific research or
2 n6 B+ e) c7 {( {9 \reporting should be done. |
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