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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 JIANG2 w) {. x+ C% W" |3 r* D, {
如果是中国长大的,英语能到这种程度真是很不简单。, { Z0 f6 k3 P% I% ]+ j
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html# j; f3 ?9 J5 f4 _2 u+ V3 G6 j
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
: c5 \8 c# y4 N1 |7 n% ^5 m, regard as one of the most prestigious and influential physical-science
3 H8 C( v0 e2 p3 n- ~magazines — publish a thinly veiled biased article like this. Granted, this: A4 \3 B# w& E# E/ k* v
is not a peer-reviewed scientific article and did not go through the
- s' N/ l) \/ m7 Yscrutiny of picking referees. But to serve as a channel for the general
$ ~& X$ ]- V0 b0 }4 L; j8 \% [populace to be in touch with and appreciate science, the authors and editors9 r, g1 B/ m H
should at least present the readers with facts within the proper context,
, {# e% x( b# o9 Z7 N; s6 twhich they blatantly failed to do.9 z4 X0 C! s: O* @1 O7 v
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First, to identify Ye’s performance increase, Ewen Callaway compared her) h* Y j+ n3 S( J# _
Olympic 400-metre IM time with her performance at the World Championships in
8 y; [% _: T+ ^$ G( [4 E2 n( U2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “0 M1 |. T& b7 z: K
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
' z r/ d& l* Rpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an9 \, Y0 V9 s& D
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
: \( P: \9 d( }; \difference between the gold and silver medal, I see no reason for 5.38 s to
6 l4 ?! e) W! F/ O" W, obe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is3 y7 b4 b! Y& X. I+ p
still developing. Bettering oneself by 5 seconds over two years may seem8 @9 I* O; X6 |& Q' M8 b9 C
impossible for an adult swimmer, but it certainly happens among youngsters.7 f+ D7 Q4 L+ @3 `( F7 s( K
An interview with Australian gold medallist Ian Thorpe revealed that his 400! S: O2 F4 U, }& V. a9 Q4 N1 e
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
: C' l1 o. @- c! M/ ?! bFor regular people, including Callaway, it may be hard to imagine what an4 n& }7 J# l5 C7 }! ^
elite swimmer can achieve as he or she matures and undergoes scientific and7 C, [8 e+ j! k- T7 U; d
persistent training. But jumping to the conclusion that it is “anomalous”2 \& Y* E" a+ a @. I
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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; I( S/ G" X# E3 Z. _Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
) `% w- x6 V; g8 x9 Lexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in4 O$ a7 r8 c- Z E
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so# o4 Q. F3 m% R& v
he chose not to push himself too hard and to conserve his energy for later
$ o/ |, D6 d) B: G# s8 R; X$ eevents (whether this conforms to the Olympic spirit and the ‘use one’s& Q$ _7 i1 B! n( x6 |* F/ r
best efforts to win a match’ requirement that the Badminton World
5 w: C* i9 K0 k$ SFederation recently invoked to disqualify four badminton pairs is another
2 }1 J% }2 A. y0 btopic worth discussing, though probably not in Nature). Ye, on the other
* B( q- {# t& J+ x" t$ p- l. c5 F Phand, was trailing behind after the first 300 metres and relied on freestyle( s7 K. {, |: X+ D$ x. d
, in which she has an edge, to win the race. Failing to mention this! Z( @* l' q6 D% r' u
strategic difference, as well as the fact that Lochte is 23.25 seconds
0 _' A* x$ u4 @6 A" ?/ T$ r- x% Lfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
) ~7 h }% F/ Y+ w5 Tfaster than the best man in the same sport, which sounds impossible. Putting
% Z( n/ w8 H$ daside the gender argument, I believe this is still a leading question that
8 D% G b, Z: v6 Z# D1 V% limplies to the reader that there is something fishy going on. C, v# ?4 h3 W2 c/ x/ e/ B
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Fourth is another example of cherry-picking. In the same event, there are9 q! o( h% w3 q) l+ J7 z! m' O
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
" P! |6 \8 F* Q; s x5 t0 Fs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
5 H! h4 R. C4 a# H2 q), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns+ O& U7 |1 n0 @* r$ g8 K3 E
out, if we are just talking about the last 50 metres in a 400-metre IM,! _# D9 f6 D1 x! V
Lochter is not the example I would have used if I were the author. What kind
, m4 W. I9 }& Y8 R8 n: w' I* @3 Cof scientific rigorousness is Callaway trying to demonstrate here? Is it- H) n3 }4 n1 N3 Q
logical that if Lochter is the champion, we should assume that he leads in
9 L' T' n% R' V4 ~: @7 a; u5 Y- Uevery split? That would be a terrible way to teach the public how science1 U. {7 s0 U6 C" {3 S. Z
works.
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& u, r) \/ M1 {9 cFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
# Z- {, |( d# n& A! cimplies that a drug test cannot rule out the possibility of doping. Is this
9 |3 ~. y+ v& }- R' i: rkind of agnosticism what Nature really wants to teach its readers? By that
' a4 Q0 r: h/ b8 o( ]standard, I estimate that at least half of the peer-reviewed scientific5 y( E7 q- B& [/ {0 l$ @1 D% t
papers in Nature should be retracted. How can one convince the editors and1 Q7 V" U- o5 D4 \% N/ _/ o0 |- }0 G
reviewers that their proposed theory works for every possible case? One
4 L; d% }. P) q$ {" ?9 N! ]$ q. ccannot. One chooses to apply the theory to typical examples and to2 y9 V: L* s0 s9 e' i) h* O2 Z
demonstrate that in (hopefully) all scenarios considered, the theory works
5 }4 T' e6 N O1 @2 {' `* Fto a degree, and that that should warrant publication until a counterexample4 v& N# _" T: e1 d, Q S* X$ _9 o, ]7 g
is found. I could imagine that Callaway has a sceptical mind, which is) W2 d9 E3 y+ b) ~2 K1 l0 [
crucial to scientific thinking, but that would be put to better use if he
2 N% ~7 d3 W0 A. Nwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
* O: y4 b6 a) [0 r" {* qadvanced, non-detectable drug that the Chinese have come up with in the7 s- Q( J( U8 u1 T! t/ w
past 4 years (they obviously did not have it in Beijing, otherwise why not, m7 ~" e9 d/ a& O" e) t) P
use it and woo the audience at home?), based on data and rational derivation
9 n' q2 _, r/ w2 b% e: Z* N8 B. This article, however, can be interpreted as saying that all athletes are7 G7 a4 | Z, S# `' `- D
doping and the authorities are just not good enough to catch them. That may6 p- p/ s2 _ |1 x6 B" x
be true, logically, but definitely will not make the case if there is ever a
# A0 L1 o% _# {$ Xhearing by the governing body for water sports, FINA, to determine if Ye! H2 P8 c5 n9 e& n) T
has doped. To ask whether it is possible to obtain a false negative in a7 o" K/ d s3 o6 R
drug test looks like a rigged question to me. Of course it is possible:% r$ n, U8 I, e0 Z# c1 D( E4 b% E: B
other than the athlete taking a drug that the test is not designed to detect- z5 y& f! j; i
, anyone who has taken quantum 101 will tell you that everything is9 {/ q: L: h; e/ g7 q
probabilistic in nature, and so there is a probability that the drug in an% J( s) V7 \8 ?% b
athlete’s system could tunnel out right at the moment of the test. A slight8 x0 n3 ~0 k# z2 K
chance it may be, but should we disregard all test results because of it?9 e& i1 d# R- i9 {9 P
Let’s be practical and reasonable, and accept that the World Anti-Doping2 i8 ]& w/ p) U3 ^ }
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
, B$ U8 c* X i8 ^/ aeight years after the contest for future testing as technology advances.& E# M1 v2 o7 u0 {. F
Innocent until proven guilty, shouldn’t it be?
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3 e' V8 X6 x& f* h8 E6 C0 p2 m9 USixth, and the last point I would like to make, is that the out-of-
4 L. q2 G: W/ b' h* Wcompetition drug test is already in effect, which Callaway failed to mention ]7 C) C, e; O1 c8 [ j b3 I
. As noted in the president of WADA’s press release, drug testing for. Q: Z6 Z1 n. y& g: B4 S) F" X
Olympians began at least six months before the opening of the London7 z+ {: C! P" _! s2 G
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
& V( ]2 V6 @0 L" o$ s7 [doping. That may be the reason that “everyone will pass at the Olympic3 u& C9 \. @: \! A) } w* b! |4 ?
games. Hardly anyone fails in competition testing” — those who did dope
7 G6 F. T7 D$ \8 D( Hhave already been caught and sanctioned. Callaway is free to suggest that a
" k- i w$ {- V: [$ n6 _player could have doped beforehand and fooled the test at the game, but this
0 c$ t) e2 Z' |# _ j+ Rpossibility is certainly ruled out for Ye." ^/ M/ n) A5 \* C' p: H+ a
, O; m/ |" J, ]& o( `" [Over all, even though Callaway did not falsify any data, he did (
7 s) n1 A K$ K/ g3 ~ f' L/ Nintentionally or not) cherry-pick data that, in my view, are far too
4 ^/ k; T1 W* z6 e* o( c5 S" {5 r# Msuggestive to be fair and unbiased. If you want to cover a story of a$ A: P; e! x0 I, ]! O
suspected doping from a scientific point of view, be impartial and provide
& ]7 I+ D R" }3 ]0 Vall the facts for the reader to judge. You are entitled to your/ X! r: }. v t9 E/ J7 D
interpretation of the facts, and the expression thereof in your piece, T& v$ G5 }$ s
explicitly or otherwise, but showing only evidence that favours your- P4 ~$ `0 v, m8 X3 l. S2 I0 U$ h4 {
argument is hardly good science or journalism. Such an article in a journal
) ?! o5 L* p. b6 X5 Y f+ p% K& psuch as Nature is not an appropriate example of how scientific research or8 L: l% M2 G5 E9 `, `
reporting should be done. |
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