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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& j8 M0 g! U( g
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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" W" k& O/ X0 B& j/ Yhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html$ v! {1 I7 ]# {: a' O" a) H/ [
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania. `+ e& V8 \' v* I" v- F
* [( Y. n. v" Y5 j: l, l8 rIt is a shame to see Nature — which nearly all scientists, including myself2 o; }: h: N) R7 B+ q3 L- K* t
, regard as one of the most prestigious and influential physical-science
0 a- a+ R; S) b& H `magazines — publish a thinly veiled biased article like this. Granted, this
3 k' |6 e8 w, N4 x+ e- o4 J, Y3 Ais not a peer-reviewed scientific article and did not go through the- B% w1 R6 }, w6 W- H r* W
scrutiny of picking referees. But to serve as a channel for the general, G4 ^& c0 w: ^* b; R9 K
populace to be in touch with and appreciate science, the authors and editors
3 A$ O. a2 o- bshould at least present the readers with facts within the proper context,
3 L# j1 H: U! X Iwhich they blatantly failed to do.. Q) X7 g5 Y1 x$ e& V, E
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First, to identify Ye’s performance increase, Ewen Callaway compared her8 f @& \. m/ P2 t
Olympic 400-metre IM time with her performance at the World Championships in
. L. J ]: @# |# d/ y+ p2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “3 ?; Z$ s/ V) v0 k
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
) c" a$ c2 |# H$ n* A" Npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an" i# h4 [& {/ T2 x5 j5 y
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the4 B' ~7 J6 C# X; P# A
difference between the gold and silver medal, I see no reason for 5.38 s to5 s% ~% k+ `( e! P& t
be treated as 7 s.
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. F$ @5 ~9 h! t" p% ^) USecond, as previously pointed out, Ye is only 16 years old and her body is
+ E8 h( ~, F9 S$ o. a8 Pstill developing. Bettering oneself by 5 seconds over two years may seem6 `7 q* W' O4 I* G& ~1 ^/ `& K
impossible for an adult swimmer, but it certainly happens among youngsters.
2 f3 D% q/ W2 n3 o/ T9 JAn interview with Australian gold medallist Ian Thorpe revealed that his 400
- |8 @) T1 k; N6 M/ l) N-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
+ T1 M" N: {! h- |8 ^& hFor regular people, including Callaway, it may be hard to imagine what an
/ R2 t% G- s8 b8 F& F8 K9 Kelite swimmer can achieve as he or she matures and undergoes scientific and; M+ n0 L$ S$ B. l9 S6 O, m
persistent training. But jumping to the conclusion that it is “anomalous”: o) g& h* N- _, j
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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8 b, J! b% n. ?7 v+ L* }Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
7 A5 l) P8 u# ?" J& E8 m, }example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
, ~" N+ P& s( c, h* ?the last 50 metres, but Lochte had a huge lead in the first 300 metres, so. _4 S" t: H0 I
he chose not to push himself too hard and to conserve his energy for later; k9 v1 z- p& I' y, h
events (whether this conforms to the Olympic spirit and the ‘use one’s
4 A0 r* s# I/ g: _0 \* ibest efforts to win a match’ requirement that the Badminton World. V: m' f. a/ ?7 v4 G
Federation recently invoked to disqualify four badminton pairs is another
6 l* I G% Z$ C5 S* Otopic worth discussing, though probably not in Nature). Ye, on the other9 j7 t1 ?, K" w8 @) {4 [2 g( }
hand, was trailing behind after the first 300 metres and relied on freestyle
1 u3 a K" v- r7 k) {$ C+ O! T% l, in which she has an edge, to win the race. Failing to mention this9 e8 m: H0 ]7 i$ _; B3 Q# l, a
strategic difference, as well as the fact that Lochte is 23.25 seconds
8 L% m. E/ Z( |1 o: ]faster (4:05.18) than Ye overall, creates the illusion that a woman swam7 W0 q, {; G# S& h' G& r7 i$ m
faster than the best man in the same sport, which sounds impossible. Putting3 `' \6 ?8 U% a. @5 E. Y8 |
aside the gender argument, I believe this is still a leading question that
! ?" L7 G. z q [implies 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% G/ |5 P H- r, L2 a
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
' l( Y/ U7 z, E+ m5 W+ {, [s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s4 [2 J6 e* m' T" L/ c& E5 D8 s
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
+ F) C: b/ e- O9 R& Qout, if we are just talking about the last 50 metres in a 400-metre IM,
3 R/ _3 R( L1 j5 `Lochter is not the example I would have used if I were the author. What kind
9 `; @0 D. u+ N- Q* e0 g# Kof scientific rigorousness is Callaway trying to demonstrate here? Is it
, `% p# \8 ?7 y% y6 |; ological that if Lochter is the champion, we should assume that he leads in9 x4 e" f% G D9 O7 D! Q
every split? That would be a terrible way to teach the public how science; B% w; B+ H2 |* @! ~% I3 }% w
works.
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! Z; U8 x& I; I9 }! Q6 z) ?& HFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
" t. f) a, L) Z+ C& dimplies that a drug test cannot rule out the possibility of doping. Is this0 w z% t8 ^6 ^1 }4 M! a
kind of agnosticism what Nature really wants to teach its readers? By that1 Y+ W2 M! B5 y4 ^# K( `
standard, I estimate that at least half of the peer-reviewed scientific
% R0 K8 X& i) ?# m& A( jpapers in Nature should be retracted. How can one convince the editors and
6 e: e* t% ~, C8 X" ^reviewers that their proposed theory works for every possible case? One
0 j1 _( c3 y2 [* g, vcannot. One chooses to apply the theory to typical examples and to- `0 e" s, M# R
demonstrate that in (hopefully) all scenarios considered, the theory works
5 O1 L" r- _# W# ]to a degree, and that that should warrant publication until a counterexample; v5 }! Y6 c& e+ v+ D7 X
is found. I could imagine that Callaway has a sceptical mind, which is, D9 y) f D. [7 X) Z
crucial to scientific thinking, but that would be put to better use if he3 o I9 {$ M& ]; v
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 R" p+ @& S4 G2 X- g
advanced, non-detectable drug that the Chinese have come up with in the
! w9 L% r6 h, W& `! V( ^+ spast 4 years (they obviously did not have it in Beijing, otherwise why not
0 |" }( d# e1 p# u- c: d+ W5 Wuse it and woo the audience at home?), based on data and rational derivation
9 B* s6 Y/ R. z. j% Q. This article, however, can be interpreted as saying that all athletes are
) }0 q% a8 V+ y; ]' \& fdoping and the authorities are just not good enough to catch them. That may7 n# o1 F5 \9 Q4 t) A% @
be true, logically, but definitely will not make the case if there is ever a$ ]9 w. |7 }! ^2 |# S4 r- L
hearing by the governing body for water sports, FINA, to determine if Ye
2 T7 d2 h% l6 [has doped. To ask whether it is possible to obtain a false negative in a2 p! h' ]4 a& x$ T
drug test looks like a rigged question to me. Of course it is possible:! I& |' F" u$ K1 R' K$ J7 }
other than the athlete taking a drug that the test is not designed to detect
/ y2 u; r' b- p, ~2 V7 x' Q, i8 d, anyone who has taken quantum 101 will tell you that everything is+ G% D4 W' Y8 I
probabilistic in nature, and so there is a probability that the drug in an
% o# t% P' s7 y$ p9 L7 y+ ]athlete’s system could tunnel out right at the moment of the test. A slight( o) a! t! u9 j+ h6 w( M
chance it may be, but should we disregard all test results because of it?
; r0 U0 b; L, ~# Z' ?; [+ ^! CLet’s be practical and reasonable, and accept that the World Anti-Doping
3 F* p) T1 {9 G* kagency (WADA) is competent at its job. Ye’s urine sample will be stored for( K9 x8 v" z1 _+ l& d: P
eight years after the contest for future testing as technology advances.
/ N& ]& r* P( XInnocent until proven guilty, shouldn’t it be?
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' }/ K, f- B- g$ Z6 ^Sixth, and the last point I would like to make, is that the out-of-
7 Y4 C5 u. I; I# u; _competition drug test is already in effect, which Callaway failed to mention
+ w4 Z4 W5 M6 x+ Z' b. As noted in the president of WADA’s press release, drug testing for/ R1 ?3 Y% ^" c4 ^7 F1 }0 ~% B
Olympians began at least six months before the opening of the London m7 k% T( _( E3 E. s
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
" w& l! O( }, i$ Y& tdoping. That may be the reason that “everyone will pass at the Olympic0 i$ B4 f4 b% ?5 D& J" r0 W' d
games. Hardly anyone fails in competition testing” — those who did dope
! \9 C; Z+ o1 Q: z' e3 Q5 J, e N1 rhave already been caught and sanctioned. Callaway is free to suggest that a1 Y! }0 @ L( ` u, I& V1 Y2 d: b
player could have doped beforehand and fooled the test at the game, but this
! d+ p0 u+ z+ [' y; Mpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
9 _3 q- C0 m" v% Q4 pintentionally or not) cherry-pick data that, in my view, are far too
( k# Z7 V; S7 I; `9 t: i! Z& T9 `suggestive to be fair and unbiased. If you want to cover a story of a2 ^ T, Z# X& R: m/ V( \1 @/ p! M
suspected doping from a scientific point of view, be impartial and provide% W: P9 @1 [ T. S" l
all the facts for the reader to judge. You are entitled to your& O6 p: g7 g$ S0 `8 ~! K& f
interpretation of the facts, and the expression thereof in your piece,
- N' P; w7 q/ `, z h# K/ Y* O8 l. `" nexplicitly or otherwise, but showing only evidence that favours your) @0 L/ x1 O% E6 y# }/ A9 R. i& T
argument is hardly good science or journalism. Such an article in a journal
( O8 W3 x1 k0 Q# ~2 ^, q6 ?$ F* nsuch as Nature is not an appropriate example of how scientific research or
' l2 c3 m3 a# f6 Qreporting should be done. |
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