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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
- D1 y, q9 W7 U* Z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.html% Q7 u- E% B( D0 F5 v. j, s9 m
+ D. k& r! @8 I+ W5 pFROM LAI JIANG, Department of Chemistry, University of Pennsylvania; M( a: C8 H7 k, f* q% w" M
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It is a shame to see Nature — which nearly all scientists, including myself& _) n8 J/ f* O! A3 K. [& } |
, regard as one of the most prestigious and influential physical-science9 D: _ F8 Q# I+ K
magazines — publish a thinly veiled biased article like this. Granted, this: ~% X* @" m/ |& y# i
is not a peer-reviewed scientific article and did not go through the
S% _' T+ R' q3 d9 \, R6 |3 Rscrutiny of picking referees. But to serve as a channel for the general" y% A) \1 i1 I8 s" ^2 K- p
populace to be in touch with and appreciate science, the authors and editors
5 G$ J+ G% F/ Q% S( wshould at least present the readers with facts within the proper context,
! L0 P! h) L+ _3 q3 {! U7 Xwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
- \. V$ d2 \9 d3 G3 [" q: U' }Olympic 400-metre IM time with her performance at the World Championships in
. ?+ C1 g4 i8 C" n# M' a, Y2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
9 o5 [* m. r2 C% x2 _( \anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous6 }/ {2 V6 v. D* S: e1 Z. G& n' H
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
, h- ]- z1 L& ]% himprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' L$ X" K: B) u* Ddifference between the gold and silver medal, I see no reason for 5.38 s to( s( u; j4 `! m$ H9 O Y$ n4 F/ ?
be treated as 7 s.3 _* }6 @0 f# n0 l* c* ]( f
1 E! V. [2 i TSecond, as previously pointed out, Ye is only 16 years old and her body is
& |5 H7 m' b# S g+ Istill developing. Bettering oneself by 5 seconds over two years may seem: m6 Z& ~6 |" ~
impossible for an adult swimmer, but it certainly happens among youngsters.
# H6 W# e6 ^. u8 K; j0 w1 WAn interview with Australian gold medallist Ian Thorpe revealed that his 400( g2 R' }1 F1 b7 Z" y; P8 y, E- \
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.* }2 p6 b( c/ F- w
For regular people, including Callaway, it may be hard to imagine what an
0 z4 p8 h( Y8 k9 X: b9 Q9 n" T& eelite swimmer can achieve as he or she matures and undergoes scientific and
3 b9 e+ N+ h. M F# @5 y0 Jpersistent training. But jumping to the conclusion that it is “anomalous”
; b* E5 m' ^* b9 q* h% rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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- D3 ]/ A6 n8 D& {/ f0 pThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 O/ g* w: K: v' I) k3 \example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in: x/ V- D& S) A
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
1 P8 S+ R: [1 {- \9 [+ The chose not to push himself too hard and to conserve his energy for later& }+ P$ t. G1 s% u2 [4 p
events (whether this conforms to the Olympic spirit and the ‘use one’s6 c: Z3 U. o4 h
best efforts to win a match’ requirement that the Badminton World3 _9 j0 J: I! B4 F$ k2 n7 U; G
Federation recently invoked to disqualify four badminton pairs is another1 w0 r1 M0 T" S
topic worth discussing, though probably not in Nature). Ye, on the other7 \% R9 ?' o& N t" f/ X
hand, was trailing behind after the first 300 metres and relied on freestyle
! o) U4 Z6 I0 H0 j* {! O2 S8 b, in which she has an edge, to win the race. Failing to mention this
5 t! e6 j Q" j: ystrategic difference, as well as the fact that Lochte is 23.25 seconds
. V+ P+ v( M, E9 B0 K% pfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
+ b' @% f m7 `7 e# P; L2 J1 ~faster than the best man in the same sport, which sounds impossible. Putting
% O" _& s6 e5 Vaside the gender argument, I believe this is still a leading question that$ S# S. c2 ]! k2 F
implies to the reader that there is something fishy going on.
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6 M# w% J2 B! f! V* _+ Z& n$ M9 `Fourth is another example of cherry-picking. In the same event, there are. K, w5 s! d1 l0 r* D6 i/ S
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93& N% J5 R% x, N: W. n7 f. |; D0 Z
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
g+ I. T1 R9 M; ?3 |! t9 P), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns7 g% H- y2 z* C+ e b
out, if we are just talking about the last 50 metres in a 400-metre IM,2 I. M" O) s6 L* J- `8 L% R& M8 e
Lochter is not the example I would have used if I were the author. What kind
/ p3 Z" k' U" _) ^3 fof scientific rigorousness is Callaway trying to demonstrate here? Is it
7 w; Z4 [% j$ I$ r; Ological that if Lochter is the champion, we should assume that he leads in6 x2 b. R% V; N& k( F. t, O
every split? That would be a terrible way to teach the public how science5 r% C _: U+ v" J( U
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and' y6 d: U9 }( K
implies that a drug test cannot rule out the possibility of doping. Is this
3 _2 v5 j; M( S6 d( R1 r, Bkind of agnosticism what Nature really wants to teach its readers? By that
" R( [8 n$ ^$ V$ ?( g: U) K( |standard, I estimate that at least half of the peer-reviewed scientific
6 M5 s' U+ b- E/ [6 p6 |# fpapers in Nature should be retracted. How can one convince the editors and
. Y# ^1 N X5 k5 Previewers that their proposed theory works for every possible case? One9 o# e' A' b& h y& k( T P
cannot. One chooses to apply the theory to typical examples and to9 b, h0 v9 q5 y) _9 i$ [; Q3 G$ d4 D9 s
demonstrate that in (hopefully) all scenarios considered, the theory works( x" v7 ~3 C9 Z4 N8 O. s: R
to a degree, and that that should warrant publication until a counterexample
; A7 k3 a( m8 B3 S e1 Y' y: \9 uis found. I could imagine that Callaway has a sceptical mind, which is
* a* @) S, V8 ?8 a7 vcrucial to scientific thinking, but that would be put to better use if he0 \4 T$ K- ?; r9 J7 w
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly- C# M& u' ~2 C$ Z9 F1 h# R
advanced, non-detectable drug that the Chinese have come up with in the
( Q! P N8 z% y2 B' Ypast 4 years (they obviously did not have it in Beijing, otherwise why not
% G, S3 \: P& O7 \' @1 L2 A8 Juse it and woo the audience at home?), based on data and rational derivation
6 t) J! M# A: N$ c" ^. This article, however, can be interpreted as saying that all athletes are
: T D+ y& W) F( Udoping and the authorities are just not good enough to catch them. That may3 `. W3 Z% |7 e; T
be true, logically, but definitely will not make the case if there is ever a
/ z- v4 {' |! `5 e' d+ @hearing by the governing body for water sports, FINA, to determine if Ye7 n r# @( H3 d5 m1 `
has doped. To ask whether it is possible to obtain a false negative in a0 }6 x9 ]0 L X) e+ i2 k! e
drug test looks like a rigged question to me. Of course it is possible:* P$ \+ y% r$ b' R
other than the athlete taking a drug that the test is not designed to detect# D, ~4 V0 P. [( N
, anyone who has taken quantum 101 will tell you that everything is
" I1 }! z5 B4 j, Kprobabilistic in nature, and so there is a probability that the drug in an2 j' G9 ?, h- H6 i5 ~1 E
athlete’s system could tunnel out right at the moment of the test. A slight
; Z& F$ b& b8 }; y0 M; nchance it may be, but should we disregard all test results because of it?7 F5 h- K0 e F5 N; Q
Let’s be practical and reasonable, and accept that the World Anti-Doping8 j7 m& W; `! Y5 n* q6 I
agency (WADA) is competent at its job. Ye’s urine sample will be stored for ~# N- P1 v# y2 M
eight years after the contest for future testing as technology advances.
6 C' h1 A7 h" r& K3 [' {% VInnocent until proven guilty, shouldn’t it be? d; c, Y5 D2 ^8 k0 M
+ C" t! Z' y {. X1 e$ J! ^2 nSixth, and the last point I would like to make, is that the out-of-' I8 k" w: }: W8 |5 u4 m6 }6 i! F' j
competition drug test is already in effect, which Callaway failed to mention
) Q. v$ r3 g8 X9 F7 [1 r. As noted in the president of WADA’s press release, drug testing for
7 U- {/ L' v+ X4 `Olympians began at least six months before the opening of the London
+ @7 X) W6 y2 [Olympics. Furthermore, 107 athletes have been banned from this Olympics for
2 D5 i, U a+ P& h1 X! ]( x2 sdoping. That may be the reason that “everyone will pass at the Olympic1 {% s# K% U& O& q
games. Hardly anyone fails in competition testing” — those who did dope N/ N1 q8 i* x+ r7 }8 A k
have already been caught and sanctioned. Callaway is free to suggest that a
# y' l3 {/ I- \player could have doped beforehand and fooled the test at the game, but this- J+ N% w" u# h. F9 g! a
possibility is certainly ruled out for Ye.
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9 e9 r$ e3 ~4 ZOver all, even though Callaway did not falsify any data, he did (
0 T, l; y' b L: ointentionally or not) cherry-pick data that, in my view, are far too
" C7 ^ d' A, |" bsuggestive to be fair and unbiased. If you want to cover a story of a
k2 R9 Q2 b; U6 c4 `: A Xsuspected doping from a scientific point of view, be impartial and provide9 i3 s; {4 y: e$ _
all the facts for the reader to judge. You are entitled to your# P1 s7 ~. k& d9 t
interpretation of the facts, and the expression thereof in your piece,& g+ l7 c' N7 D; x ], I
explicitly or otherwise, but showing only evidence that favours your
; k$ T, g4 |# n* G$ J# l: eargument is hardly good science or journalism. Such an article in a journal. L) s% v# Y; n/ b& w0 |
such as Nature is not an appropriate example of how scientific research or
' O6 E, Q. _3 d; K. o4 s. k8 Lreporting should be done. |
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