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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
% |- S1 `- |- } X8 w3 ~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.html9 R5 Y# A+ G. `" k" t% K" C3 q& v/ j
* b2 H3 u5 [4 A0 [FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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) e" }& O8 z$ ^' |# LIt is a shame to see Nature — which nearly all scientists, including myself' I+ L* z o$ g8 X/ R
, regard as one of the most prestigious and influential physical-science5 Y& v- c G8 r! O! G
magazines — publish a thinly veiled biased article like this. Granted, this
" {% c8 s' j @6 y' q& |8 |2 x# dis not a peer-reviewed scientific article and did not go through the
: g) V- w: ?+ c, Oscrutiny of picking referees. But to serve as a channel for the general
1 W' v& T$ v/ U' U+ J6 z1 i: [5 Cpopulace to be in touch with and appreciate science, the authors and editors
. H4 w7 l* X+ l" {7 Jshould at least present the readers with facts within the proper context,
1 m3 L" b, S2 V6 [& V9 j, ]' s& mwhich they blatantly failed to do.
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% V$ [9 c& S8 q8 |First, to identify Ye’s performance increase, Ewen Callaway compared her
, T" L* M9 ~7 a }$ [* OOlympic 400-metre IM time with her performance at the World Championships in
+ f. C' q9 k [& I2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “, ]1 g* f& }: Y, P3 G3 L2 a
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous0 t# G8 _0 \& `1 D
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
4 x% y2 s0 D: X/ v2 e1 P. |improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the6 r! s- z* g7 V( x: H. T6 z
difference between the gold and silver medal, I see no reason for 5.38 s to
6 M& G4 F; Z/ dbe treated as 7 s./ c! y C/ N* B8 _5 U
4 Q1 m& Q: I: J" SSecond, as previously pointed out, Ye is only 16 years old and her body is& I9 I" [. A& ^/ H1 |0 t& o
still developing. Bettering oneself by 5 seconds over two years may seem
' O; y% w6 Q/ ~; a- Z Eimpossible for an adult swimmer, but it certainly happens among youngsters.! s9 z1 q7 g( W# H$ O
An interview with Australian gold medallist Ian Thorpe revealed that his 400
T2 I; K' c( R- n$ ?- {-metre freestyle time improved by 5 seconds between the ages of 15 and 16.2 S* ^7 A/ }% i% o
For regular people, including Callaway, it may be hard to imagine what an5 T9 @ Q/ x( I% ?- K0 ?
elite swimmer can achieve as he or she matures and undergoes scientific and1 l2 e7 Q# p. [. Z4 c, R
persistent training. But jumping to the conclusion that it is “anomalous”
! j s5 x c# h. n( v+ dbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.: y+ N* o, \8 j" o* u$ A2 w
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
8 `! A' |6 b8 ^, J* u1 }7 y+ R! Qexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in3 u9 P: A; d6 ~0 Y9 `! S$ G3 @+ P
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so& C9 X' I& k3 W7 b. a- V
he chose not to push himself too hard and to conserve his energy for later
6 ~4 b( i: x2 t5 u0 jevents (whether this conforms to the Olympic spirit and the ‘use one’s
8 f- ~; `4 `3 w7 s/ zbest efforts to win a match’ requirement that the Badminton World
$ D) Q4 e4 ]; Y7 Z; b' N3 pFederation recently invoked to disqualify four badminton pairs is another3 Z k" M2 }$ v6 q
topic worth discussing, though probably not in Nature). Ye, on the other" X' N% d2 W2 V: F$ V
hand, was trailing behind after the first 300 metres and relied on freestyle
; j1 M' [ ]2 j4 g2 x, in which she has an edge, to win the race. Failing to mention this3 U. i, [7 {- b- a1 o' ^3 S
strategic difference, as well as the fact that Lochte is 23.25 seconds
; R! l( r7 X0 Pfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
/ o! D7 B4 T- f( s/ }faster than the best man in the same sport, which sounds impossible. Putting. M! s7 B2 w! B& h$ x
aside the gender argument, I believe this is still a leading question that+ U+ v! G2 m+ M# `5 S& j/ } y# K
implies to the reader that there is something fishy going on.
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# c9 b% D' T* d% \Fourth is another example of cherry-picking. In the same event, there are
9 [3 ~4 R# H/ @0 }: f3 x1 _four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
& |1 \$ N! ` D4 Y4 H* e7 Ws) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s6 I! j/ [+ |# y x5 |
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
& Q' ?$ Q* V3 W! _* sout, if we are just talking about the last 50 metres in a 400-metre IM,
4 v. \" U* k6 \7 _# P) {$ C5 hLochter is not the example I would have used if I were the author. What kind
8 r8 M, M, t3 U6 Pof scientific rigorousness is Callaway trying to demonstrate here? Is it9 e, j- O2 e2 s6 c" N7 Y& m
logical that if Lochter is the champion, we should assume that he leads in
' j6 H; b' |' gevery split? That would be a terrible way to teach the public how science$ C# [* f. l: ^: l
works.
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$ K; e0 g0 |% b; U2 I+ x1 F' a9 QFifth is the issue I oppose the most. Callaway quotes Ross Tucker and* _. m& B9 ^. J/ l
implies that a drug test cannot rule out the possibility of doping. Is this9 @5 B. c# U( ~7 E [
kind of agnosticism what Nature really wants to teach its readers? By that6 `3 o( x/ g+ G' b8 U' _4 u
standard, I estimate that at least half of the peer-reviewed scientific
& X6 N& j9 G* V" j$ n- g9 ^papers in Nature should be retracted. How can one convince the editors and9 ?5 \6 v- O! T% O! q0 _2 }1 R: ^7 h
reviewers that their proposed theory works for every possible case? One
. }( D* `1 A$ `cannot. One chooses to apply the theory to typical examples and to/ P S- ]3 N8 k, W3 s
demonstrate that in (hopefully) all scenarios considered, the theory works7 S' f3 Q) Z4 {0 F7 V$ `9 m( e. F
to a degree, and that that should warrant publication until a counterexample0 p" ^$ {& `+ Q2 ^
is found. I could imagine that Callaway has a sceptical mind, which is
1 R+ g; x4 C! |! Wcrucial to scientific thinking, but that would be put to better use if he6 C4 l% o! Y2 j8 r! V0 Q
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly* @1 C7 h% X' ^
advanced, non-detectable drug that the Chinese have come up with in the
' C4 H) {0 f5 \. _. Lpast 4 years (they obviously did not have it in Beijing, otherwise why not3 n7 y! R% `, [7 \6 x. @+ v/ [6 \
use it and woo the audience at home?), based on data and rational derivation
& u0 }& P/ a0 H: ?3 M. This article, however, can be interpreted as saying that all athletes are6 k4 y/ X" D( g' ?; v) |* i9 w
doping and the authorities are just not good enough to catch them. That may1 D7 _' |. |* I; G* J1 }$ v0 W. H* L) Z
be true, logically, but definitely will not make the case if there is ever a
}6 R0 n; F6 z) U, Thearing by the governing body for water sports, FINA, to determine if Ye3 A/ G) F: ~# G4 V- I9 I
has doped. To ask whether it is possible to obtain a false negative in a, j+ T: W) `, t# J, l) F
drug test looks like a rigged question to me. Of course it is possible:
b$ ^2 H4 X/ r. P" `% Z* Qother than the athlete taking a drug that the test is not designed to detect$ ?1 S1 ^" S1 R
, anyone who has taken quantum 101 will tell you that everything is6 @& I7 b& O8 I% d) _5 m1 k, Q5 A
probabilistic in nature, and so there is a probability that the drug in an% } {9 @; D) {9 v# e- X
athlete’s system could tunnel out right at the moment of the test. A slight
, f8 o+ D' Z- `* J, lchance it may be, but should we disregard all test results because of it?. y/ X z8 W6 d, t4 \8 K
Let’s be practical and reasonable, and accept that the World Anti-Doping
, Y' i2 p# v$ z- }% Sagency (WADA) is competent at its job. Ye’s urine sample will be stored for
7 @) p( |1 }* b( P! ^' weight years after the contest for future testing as technology advances.
" j7 z l T Y# ~) e+ r% C, CInnocent until proven guilty, shouldn’t it be?
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0 M& S' }8 l2 J, I" A3 iSixth, and the last point I would like to make, is that the out-of-
2 G9 ~4 `. x6 ^! Y& F) bcompetition drug test is already in effect, which Callaway failed to mention8 D6 D- M( Q& r/ o X% K0 |
. As noted in the president of WADA’s press release, drug testing for
% P$ N" G$ b4 o9 m3 N8 kOlympians began at least six months before the opening of the London6 r1 B \% _2 j8 w1 F. u3 ^# E
Olympics. Furthermore, 107 athletes have been banned from this Olympics for! v( i5 m' I6 }( A) R8 w! `+ P9 }
doping. That may be the reason that “everyone will pass at the Olympic D$ ~* ?" F6 k! n
games. Hardly anyone fails in competition testing” — those who did dope0 P8 A& O8 ]$ k% U/ H' s4 ~8 K
have already been caught and sanctioned. Callaway is free to suggest that a' F2 _$ t) T' f
player could have doped beforehand and fooled the test at the game, but this
# M( @5 K7 G# k3 q! t$ q" Dpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
* g9 z6 G' m9 H. Hintentionally or not) cherry-pick data that, in my view, are far too
& [( J; u# e- f& V1 y. T" Zsuggestive to be fair and unbiased. If you want to cover a story of a
- t3 \ ]; v7 w% w4 P5 Osuspected doping from a scientific point of view, be impartial and provide& R$ P8 a' W5 [0 _3 A
all the facts for the reader to judge. You are entitled to your
- D2 | ]. G" b! Xinterpretation of the facts, and the expression thereof in your piece,9 p1 Z K4 k: i. u1 p
explicitly or otherwise, but showing only evidence that favours your1 Q! g) r$ ^: ]! M; @1 H8 i1 z
argument is hardly good science or journalism. Such an article in a journal* ^' p5 e$ Y/ g8 s& q% L
such as Nature is not an appropriate example of how scientific research or0 ^' u8 L( G9 D! R8 r( N
reporting should be done. |
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