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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 JIANG4 a2 ]( b, E. K0 b# ]
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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& ^) P: d9 v- J0 y. k$ k3 _; ihttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html0 j: _5 l) j1 s0 o& f2 B2 T
6 ]& Y7 D: E2 B0 q* ?) q- [FROM LAI JIANG, Department of Chemistry, University of Pennsylvania" p7 n7 m4 ?9 m' w( t
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It is a shame to see Nature — which nearly all scientists, including myself+ A4 `* ?- X- P
, regard as one of the most prestigious and influential physical-science
$ e. \: D% g1 x1 B. i" Dmagazines — publish a thinly veiled biased article like this. Granted, this
) [" G. f) O2 f5 `1 vis not a peer-reviewed scientific article and did not go through the
+ ^4 ^/ R( z2 k, Gscrutiny of picking referees. But to serve as a channel for the general
/ _ N1 o2 \, q& epopulace to be in touch with and appreciate science, the authors and editors
. e, }0 }5 f+ W/ L! r! kshould at least present the readers with facts within the proper context,
' E) }! z0 u2 ^which they blatantly failed to do.* @" Z: P5 m9 I6 e
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First, to identify Ye’s performance increase, Ewen Callaway compared her
6 B/ t1 `2 J. q) G8 \* W `4 dOlympic 400-metre IM time with her performance at the World Championships in/ p2 S6 T$ D1 S: x
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “* t4 r& n' O- `) P/ f7 s
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
' n9 [, Q9 D: A, g) _personal best was 4:33.79 at the Asian Games in 2010. This leads to an8 ^7 E; {( Z* _; o- ^+ G, u) I: ]
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
8 w+ B8 [! n$ n; Xdifference between the gold and silver medal, I see no reason for 5.38 s to8 [) Q3 [, d+ L4 r# O
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is7 ~6 H4 c6 K9 w9 @
still developing. Bettering oneself by 5 seconds over two years may seem
" `0 c" t; Z4 Yimpossible for an adult swimmer, but it certainly happens among youngsters.
; |' F9 K* g1 ?: G& a. f8 ~ `$ a9 CAn interview with Australian gold medallist Ian Thorpe revealed that his 400$ c' I- ?7 @% d* d3 ?$ i% `1 R1 {
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
3 D4 s) m- @! GFor regular people, including Callaway, it may be hard to imagine what an. r' f% O' m% P" y! r+ M
elite swimmer can achieve as he or she matures and undergoes scientific and
" [% t% |" G. N4 l2 S. H8 @persistent training. But jumping to the conclusion that it is “anomalous”- V9 N" \+ U7 a; V1 n
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.6 T' }3 L, Q( D" E8 O- t
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
2 @" Q* f6 _: w3 O8 l% }3 M+ Fexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in3 @& f/ m& C( o( q, M& m" b
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
; F$ L0 _( q% m# N, S. Q$ E) I) xhe chose not to push himself too hard and to conserve his energy for later
+ d3 l5 s5 `; O4 Y3 u+ g# qevents (whether this conforms to the Olympic spirit and the ‘use one’s
. ^# j3 H6 e3 b! Hbest efforts to win a match’ requirement that the Badminton World
7 p$ e! z- d1 I, `7 aFederation recently invoked to disqualify four badminton pairs is another
, _1 x* k4 y4 B1 I/ ttopic worth discussing, though probably not in Nature). Ye, on the other e% \0 d6 d* S, S6 n# k
hand, was trailing behind after the first 300 metres and relied on freestyle
# X; [0 Y w6 `9 ^$ \) l, in which she has an edge, to win the race. Failing to mention this
. W4 g$ ^3 y' t5 F jstrategic difference, as well as the fact that Lochte is 23.25 seconds: B3 g+ Z$ U4 b: j1 s( V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
; ~# \* v0 ]7 R9 Z, B: c& Kfaster than the best man in the same sport, which sounds impossible. Putting k. y4 Q4 y6 y
aside the gender argument, I believe this is still a leading question that
7 `) ~9 v* |& f6 @, o+ v" `" g4 Uimplies to the reader that there is something fishy going on.
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* z$ r8 D# J3 _9 i' f. p* \Fourth is another example of cherry-picking. In the same event, there are
& a% a; H8 K% K% N& U. e5 D- K1 Afour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
+ s4 ^% d9 I3 g+ I; _, p9 [4 |( Q, Vs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s9 G: e5 J; y7 t& @# H4 j/ B
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. s, M5 E5 a! M/ sout, if we are just talking about the last 50 metres in a 400-metre IM,! g7 T! I% I8 j5 Q
Lochter is not the example I would have used if I were the author. What kind- I" O4 I7 ^9 n8 {7 @3 d# _1 P
of scientific rigorousness is Callaway trying to demonstrate here? Is it+ i$ {( S* ~+ p4 ?, ^
logical that if Lochter is the champion, we should assume that he leads in
% r5 c T) Y2 |4 yevery split? That would be a terrible way to teach the public how science
, c+ } V* t$ J, P( I& [* u/ B3 {" Iworks.
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" b3 V w- @: I* q+ x) JFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
# c \3 i4 |: m; q6 ~* iimplies that a drug test cannot rule out the possibility of doping. Is this$ \+ ^" ^- H! d
kind of agnosticism what Nature really wants to teach its readers? By that
; g8 d2 l+ {/ L6 N: ^9 ~' ]standard, I estimate that at least half of the peer-reviewed scientific
! L, w2 d( {$ mpapers in Nature should be retracted. How can one convince the editors and
. S& `+ |- E' D% b' g( {! `) Freviewers that their proposed theory works for every possible case? One
2 `+ A6 o+ F3 A7 ?: Mcannot. One chooses to apply the theory to typical examples and to
1 s7 | B6 M, `5 |8 ~demonstrate that in (hopefully) all scenarios considered, the theory works* ?1 a7 z `) V* ~+ N- ^8 l; m* E
to a degree, and that that should warrant publication until a counterexample9 @( {; k+ B Z( R
is found. I could imagine that Callaway has a sceptical mind, which is
) O( s! \6 s- m! lcrucial to scientific thinking, but that would be put to better use if he: k0 H0 m$ m4 }# q q
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
/ ]* ]" a7 ~, z+ Tadvanced, non-detectable drug that the Chinese have come up with in the3 v; E: D: F8 Z/ o& h1 c% a3 `
past 4 years (they obviously did not have it in Beijing, otherwise why not
4 o* W: P. d. `7 l4 T muse it and woo the audience at home?), based on data and rational derivation1 M2 X2 J2 ?- i% K7 R4 E
. This article, however, can be interpreted as saying that all athletes are
9 Z6 |% g! |& z4 Gdoping and the authorities are just not good enough to catch them. That may
7 e7 v+ z; @ N9 o2 O" Dbe true, logically, but definitely will not make the case if there is ever a
: D3 \# j6 d1 D5 d, H( v _hearing by the governing body for water sports, FINA, to determine if Ye7 w; i) Y- L, r
has doped. To ask whether it is possible to obtain a false negative in a
" |0 i# x3 z' A& e' T7 c3 sdrug test looks like a rigged question to me. Of course it is possible:
6 Z' D# _' T; K% @ cother than the athlete taking a drug that the test is not designed to detect
% L2 g6 C2 E0 y- U/ a0 m4 H, anyone who has taken quantum 101 will tell you that everything is7 J3 m$ Z# L. Y, n2 H
probabilistic in nature, and so there is a probability that the drug in an
3 G" x" j2 }4 ~# g5 m$ a4 H/ x7 sathlete’s system could tunnel out right at the moment of the test. A slight
4 R2 q' r7 c+ L1 z+ |; Qchance it may be, but should we disregard all test results because of it?
3 Y$ k% P) B' M+ s, u) D% PLet’s be practical and reasonable, and accept that the World Anti-Doping
& t2 A4 u' q; G8 ~/ Ragency (WADA) is competent at its job. Ye’s urine sample will be stored for
' l% e0 d/ a. y. t" Xeight years after the contest for future testing as technology advances.
% X t* G4 e+ }* ^- `Innocent until proven guilty, shouldn’t it be?, r: z" m8 h) ]; Q( H7 ]2 K
8 r. d& p3 C( KSixth, and the last point I would like to make, is that the out-of-- ~- t% v; q( n. l
competition drug test is already in effect, which Callaway failed to mention3 l. {: A5 h0 |5 X
. As noted in the president of WADA’s press release, drug testing for
( d9 ~$ S/ g7 ~/ Y8 ~: X e1 nOlympians began at least six months before the opening of the London
, N- e2 W$ N, Y, E- VOlympics. Furthermore, 107 athletes have been banned from this Olympics for
0 O1 H k; \! G- Bdoping. That may be the reason that “everyone will pass at the Olympic
; q+ `( m$ A5 r- ]0 ygames. Hardly anyone fails in competition testing” — those who did dope
1 l0 w# q6 z% R& S% C* thave already been caught and sanctioned. Callaway is free to suggest that a! [4 s4 i5 `" n4 i2 \
player could have doped beforehand and fooled the test at the game, but this# r& H" v8 N6 V& n, U( p) k Y, Y
possibility is certainly ruled out for Ye.% Y" |% v3 J! [, C5 v; \
; G7 @' S. C" tOver all, even though Callaway did not falsify any data, he did (
" y( I. t: z0 F1 ?- ?1 xintentionally or not) cherry-pick data that, in my view, are far too
9 G9 U9 Q( w3 B( L- m1 P( y* w @6 msuggestive to be fair and unbiased. If you want to cover a story of a8 I. d( ^1 q; V2 ?& h. A$ D7 L% R
suspected doping from a scientific point of view, be impartial and provide
7 o2 F% I9 e, k# U! nall the facts for the reader to judge. You are entitled to your
8 c6 Z. }1 z9 \6 I0 o# J, H8 D% qinterpretation of the facts, and the expression thereof in your piece,
0 ?3 E. X% D! _* uexplicitly or otherwise, but showing only evidence that favours your* N$ i8 f; \4 G- h6 Q
argument is hardly good science or journalism. Such an article in a journal
/ D$ e' E9 ]( C5 \such as Nature is not an appropriate example of how scientific research or
6 T0 V/ r) v! K! S$ ^reporting should be done. |
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