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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
4 ]8 @4 q# k7 a" ]) I: H3 [9 N9 _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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; J( G! C9 ]- r$ c- t/ jhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania1 Q/ B8 Q( m% s. a0 M4 K: P" x
9 P( I( v; Y! o3 @. HIt is a shame to see Nature — which nearly all scientists, including myself
- d8 t1 b0 \5 `* h7 k! t, regard as one of the most prestigious and influential physical-science
( A2 m' k# M4 X5 g' Omagazines — publish a thinly veiled biased article like this. Granted, this
+ x# v. ~! h0 J0 J) P% mis not a peer-reviewed scientific article and did not go through the
# G# ^" Q! G, v& T7 p% ~# Iscrutiny of picking referees. But to serve as a channel for the general. m2 }9 D5 {4 U6 M# Y) }
populace to be in touch with and appreciate science, the authors and editors1 Z9 x" R9 ^7 p
should at least present the readers with facts within the proper context," L( y3 e. ]( e4 G; v% a: k; M
which they blatantly failed to do.: ^# s: ?) c! t+ J8 W
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First, to identify Ye’s performance increase, Ewen Callaway compared her" ~. w& ?# L8 A+ Q0 f6 m, k" Q$ _, g
Olympic 400-metre IM time with her performance at the World Championships in
, i8 @# W# h# ~" D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “$ B7 X. y% m% k8 O7 h O v
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
1 Y9 a& j. k7 A3 I2 P( Q3 Npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
; t. [8 h8 l1 v% wimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
. R8 h# z6 M2 e* k! g) Kdifference between the gold and silver medal, I see no reason for 5.38 s to
/ o8 h/ H4 y b f* B6 ]+ ibe treated as 7 s./ O7 m8 r8 L6 g7 I( \! n, \
1 g& V7 H8 v6 Q+ r' Y: eSecond, as previously pointed out, Ye is only 16 years old and her body is
) i4 w6 O7 K m; A8 C. w |! Mstill developing. Bettering oneself by 5 seconds over two years may seem
. Z. ^4 V& f3 [1 J# Oimpossible for an adult swimmer, but it certainly happens among youngsters." N* b8 l* f3 y, I$ v
An interview with Australian gold medallist Ian Thorpe revealed that his 400
# E3 Q9 z9 Y7 K/ M1 y1 k# d* ]-metre freestyle time improved by 5 seconds between the ages of 15 and 16.) @3 r1 a" @: k. L0 F2 F# ~
For regular people, including Callaway, it may be hard to imagine what an* r; X+ {$ [; K9 ^/ }. G
elite swimmer can achieve as he or she matures and undergoes scientific and, U' Y4 j) Z B# i& V3 ^
persistent training. But jumping to the conclusion that it is “anomalous”* o: T9 r! j; C! z* V% V* X
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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' w9 H ] T( P7 f6 L. s/ A/ mThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook9 O1 u9 b5 K* |6 f( d# @: W
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in1 d7 u! S: `( L( ?( e# B
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
# [$ p1 w. A% jhe chose not to push himself too hard and to conserve his energy for later
* i& n! M% I% V" C& V2 w* Devents (whether this conforms to the Olympic spirit and the ‘use one’s
" D1 D) V) K; x% E+ m( u% N+ ]best efforts to win a match’ requirement that the Badminton World8 b% K/ k3 u3 [; H5 C% h. M
Federation recently invoked to disqualify four badminton pairs is another& ~0 |) ]3 [2 o" v' n) {- C& j/ P
topic worth discussing, though probably not in Nature). Ye, on the other
`& }2 x1 I4 s6 g% e+ mhand, was trailing behind after the first 300 metres and relied on freestyle
& ]& d. J* s+ H, in which she has an edge, to win the race. Failing to mention this3 M: v6 D2 B$ ^8 W0 K
strategic difference, as well as the fact that Lochte is 23.25 seconds
/ Q0 P! B3 s8 P Sfaster (4:05.18) than Ye overall, creates the illusion that a woman swam* S+ C8 p6 u k1 l# T8 ~6 {
faster than the best man in the same sport, which sounds impossible. Putting
, H' o) z6 A5 Baside the gender argument, I believe this is still a leading question that
^ |. A" L. L4 T' V0 yimplies 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
. Z5 H2 `* Y4 W5 C# @four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.932 O1 L4 U- h! Y( z1 d+ v# j
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& a! V$ L. ?; }8 P4 M, S. y
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns* x8 m3 m5 n" [# t+ \* a$ H/ |
out, if we are just talking about the last 50 metres in a 400-metre IM,7 q4 d+ Z) h( b
Lochter is not the example I would have used if I were the author. What kind4 B5 _0 m: z) e8 k( w4 W1 {
of scientific rigorousness is Callaway trying to demonstrate here? Is it8 ]' l$ \4 m3 s' ~
logical that if Lochter is the champion, we should assume that he leads in1 M% ?8 ^8 e6 k9 l2 ^& T/ d) G
every split? That would be a terrible way to teach the public how science
. c# e7 d+ L* ]" J6 u: Q% Qworks." v8 @6 z( U" `1 Z# g
7 w5 c9 q2 p+ a; L; {Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and+ v) m- q T9 X) ~ A8 T
implies that a drug test cannot rule out the possibility of doping. Is this
+ o9 w! U3 P: F) vkind of agnosticism what Nature really wants to teach its readers? By that/ @: E% p5 c$ K4 u$ y
standard, I estimate that at least half of the peer-reviewed scientific
7 S/ [7 {0 n* F& J- [$ {papers in Nature should be retracted. How can one convince the editors and
! ]" x. H! C+ Z+ j' c3 o$ yreviewers that their proposed theory works for every possible case? One* x3 R* f4 S. A0 V! e( Y# A
cannot. One chooses to apply the theory to typical examples and to9 r, `% c+ |" j$ i y' c5 i
demonstrate that in (hopefully) all scenarios considered, the theory works% _1 D" }6 y7 k% p
to a degree, and that that should warrant publication until a counterexample( k" B1 }/ F3 Y4 x
is found. I could imagine that Callaway has a sceptical mind, which is
( |5 Q6 \/ Y, L' U1 `# O$ lcrucial to scientific thinking, but that would be put to better use if he
! Q: _: Y/ w" L* J$ r( ?wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
1 X# o0 M) ?3 P2 H: D5 fadvanced, non-detectable drug that the Chinese have come up with in the3 _! m- U( \6 ^) _4 F: G
past 4 years (they obviously did not have it in Beijing, otherwise why not9 Y6 S2 j) I% v4 n2 e
use it and woo the audience at home?), based on data and rational derivation: d9 b/ B1 S$ @+ J2 g: h, Z1 l* Z
. This article, however, can be interpreted as saying that all athletes are; q( _+ R+ b5 F* F5 u* }1 }
doping and the authorities are just not good enough to catch them. That may
8 z/ s" ]6 G: u) i4 Hbe true, logically, but definitely will not make the case if there is ever a R5 Q6 w5 A7 h6 q. X! C) n
hearing by the governing body for water sports, FINA, to determine if Ye0 [/ Z. t& N; z$ ~
has doped. To ask whether it is possible to obtain a false negative in a" v+ q, r$ E! X1 N
drug test looks like a rigged question to me. Of course it is possible:
% A, L8 m* c# L4 e& l2 pother than the athlete taking a drug that the test is not designed to detect
' m: e2 b5 ]! y |8 d4 `$ U, anyone who has taken quantum 101 will tell you that everything is9 O% l' _) C) M- R; C, w9 l, {
probabilistic in nature, and so there is a probability that the drug in an
7 t& `1 f& f' C0 t! x+ L0 V0 Jathlete’s system could tunnel out right at the moment of the test. A slight
4 L( g) Y* @( {6 ]chance it may be, but should we disregard all test results because of it?$ j8 w0 h6 G X0 T1 D* x( r' ?- G# X) j
Let’s be practical and reasonable, and accept that the World Anti-Doping& s9 R9 H& _% N" ~8 P1 ^
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
; N0 g" ~) V Z- R$ z: F7 C" height years after the contest for future testing as technology advances.
* F A2 Y( a( _) ^ M% XInnocent until proven guilty, shouldn’t it be?( U4 m; g8 A; v# T" j6 ~- o' v2 N
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Sixth, and the last point I would like to make, is that the out-of-0 T0 O) Q" c8 w w1 k* l
competition drug test is already in effect, which Callaway failed to mention0 A2 _% U6 W) c3 Y }
. As noted in the president of WADA’s press release, drug testing for2 g2 ~, N; p+ h4 e+ Y: c4 t6 @0 q# h
Olympians began at least six months before the opening of the London
: S) a! D. p. AOlympics. Furthermore, 107 athletes have been banned from this Olympics for
8 ]6 o' M! h9 A8 Wdoping. That may be the reason that “everyone will pass at the Olympic
6 \, b* M5 g! Y( xgames. Hardly anyone fails in competition testing” — those who did dope$ l4 z8 j7 [. }6 R
have already been caught and sanctioned. Callaway is free to suggest that a
: l& | k4 C3 m$ P* fplayer could have doped beforehand and fooled the test at the game, but this7 Q. p- h, Q. k3 Z8 n! j6 L; r
possibility is certainly ruled out for Ye.% o0 V' O3 i- M, t8 w; Q
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Over all, even though Callaway did not falsify any data, he did (
; \" E! C) r+ W+ |intentionally or not) cherry-pick data that, in my view, are far too
- ~2 A+ d, b0 R/ Y8 gsuggestive to be fair and unbiased. If you want to cover a story of a
8 }: C% l: t! y) Z9 `: {suspected doping from a scientific point of view, be impartial and provide
2 M" j2 l' U0 k+ `" w, ?7 Rall the facts for the reader to judge. You are entitled to your; I6 e d. L% H; C' T( R( ~
interpretation of the facts, and the expression thereof in your piece,0 j3 [. {% O8 O5 ]9 M8 E- _& m% p- `4 P
explicitly or otherwise, but showing only evidence that favours your
6 y6 c* {1 }; Jargument is hardly good science or journalism. Such an article in a journal x! d( t; j4 c Q: l% k
such as Nature is not an appropriate example of how scientific research or0 c# b. C3 r ]; M) E+ B
reporting should be done. |
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