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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
- [1 P8 r3 ^- p% ~# P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
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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
8 Q% I2 y# f! Q6 u0 n, regard as one of the most prestigious and influential physical-science
5 g3 Z* q6 |1 R* O9 qmagazines — publish a thinly veiled biased article like this. Granted, this( N n( A7 b# `2 K" o! \+ R+ u% ?$ h
is not a peer-reviewed scientific article and did not go through the
: i; K9 j* X* s9 Z5 e4 Z& rscrutiny of picking referees. But to serve as a channel for the general
6 @! c+ W# d a5 d: @7 rpopulace to be in touch with and appreciate science, the authors and editors
1 W) a+ Z5 x% Xshould at least present the readers with facts within the proper context,6 {4 F2 G/ _, F5 S- |
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her! K' X: B: r: A) ^
Olympic 400-metre IM time with her performance at the World Championships in
) A; Q4 _: }: G3 t2 ]1 i3 W2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
3 X$ O# b. A. Q6 P& F$ p. Ianomalous” improvement of around 7 seconds (6.72 s). In fact, her previous- C0 d4 I" H: a, o& b* a
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
0 A: L& g' R3 yimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
0 v4 l+ j& z! s/ Zdifference between the gold and silver medal, I see no reason for 5.38 s to
( b$ h8 o' E! l8 v( ?! k6 ^be treated as 7 s. ~( L$ J- g; C6 g* Q* l
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Second, as previously pointed out, Ye is only 16 years old and her body is
. t3 c8 t, Z3 E8 m, S4 j+ E: [still developing. Bettering oneself by 5 seconds over two years may seem% }' ?5 O* A% W/ @4 G
impossible for an adult swimmer, but it certainly happens among youngsters.5 c$ Y d3 q# g+ h n: I+ l# W
An interview with Australian gold medallist Ian Thorpe revealed that his 4008 g4 i5 y2 d X" |( C: A: k
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.5 d1 m6 k& {9 y9 g
For regular people, including Callaway, it may be hard to imagine what an
; J. Y0 q+ n/ K- Belite swimmer can achieve as he or she matures and undergoes scientific and
\, [: B' k1 d7 R7 _6 k( Kpersistent training. But jumping to the conclusion that it is “anomalous” l( a! m6 c [3 P
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound." q0 [8 A6 s( a6 u4 f0 s
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
* K: v+ w1 Q B$ Kexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
" B$ I( b3 m' ^# ` p* Uthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
/ ?1 }7 C+ p0 r, S& Xhe chose not to push himself too hard and to conserve his energy for later
- O& _. B. ]* g" T; J9 I9 r! _3 Jevents (whether this conforms to the Olympic spirit and the ‘use one’s
) x, L4 k1 Q: t- n0 hbest efforts to win a match’ requirement that the Badminton World
- M$ g& N, v( ]) HFederation recently invoked to disqualify four badminton pairs is another1 F% ?- u' r% N% D
topic worth discussing, though probably not in Nature). Ye, on the other
1 `7 z3 Q5 V9 ]; Zhand, was trailing behind after the first 300 metres and relied on freestyle
, Z |! I/ q, b3 S# O, in which she has an edge, to win the race. Failing to mention this' k1 G; W! B$ I
strategic difference, as well as the fact that Lochte is 23.25 seconds
" o. V5 X( }* O0 T1 ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam
# Y0 H& o' p. }# L: ]faster than the best man in the same sport, which sounds impossible. Putting9 e4 b# H* h$ i! [
aside the gender argument, I believe this is still a leading question that
0 h2 J/ x1 g. n6 i$ F8 I+ Nimplies 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& r$ m6 b3 v6 @0 { l- ^
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93% ]+ H: n( r/ k- \+ T* }
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s: Z: m& s2 G! N/ J/ Z
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
8 b% G3 w! w. S& E& Iout, if we are just talking about the last 50 metres in a 400-metre IM,
, a7 ]: e# P' v" dLochter is not the example I would have used if I were the author. What kind
3 U! j2 V, k6 P8 u4 O4 B$ F% B* ~/ |of scientific rigorousness is Callaway trying to demonstrate here? Is it) a: T; Y( A* y
logical that if Lochter is the champion, we should assume that he leads in
1 C" S. l( ]0 B; |& F! wevery split? That would be a terrible way to teach the public how science
0 v1 n. a) e$ Y i4 U5 l5 u. Zworks.
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% `& A: ? o- Z3 T9 ?( W, pFifth is the issue I oppose the most. Callaway quotes Ross Tucker and" f7 p3 M) q2 t D8 B! u- k# N
implies that a drug test cannot rule out the possibility of doping. Is this
* K: A9 A; s3 ~! I" ], xkind of agnosticism what Nature really wants to teach its readers? By that" |/ _) T' A3 I5 G0 A
standard, I estimate that at least half of the peer-reviewed scientific; f5 x9 D3 N5 H9 n( x
papers in Nature should be retracted. How can one convince the editors and ], E2 p! g# t1 b2 k. _
reviewers that their proposed theory works for every possible case? One
( p9 r. B5 W, I; Wcannot. One chooses to apply the theory to typical examples and to5 g% ]6 D$ ^/ H+ T0 @
demonstrate that in (hopefully) all scenarios considered, the theory works! d+ _ y% P0 N6 G! Y
to a degree, and that that should warrant publication until a counterexample
5 D+ X, |% Q0 J) y5 [$ fis found. I could imagine that Callaway has a sceptical mind, which is
! S( c f& F. icrucial to scientific thinking, but that would be put to better use if he
( x( E8 S. V! r2 p/ J1 Pwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
2 A, `$ [, ], A' a" w) yadvanced, non-detectable drug that the Chinese have come up with in the% J- b( G" G9 O3 S+ N. y) B6 N
past 4 years (they obviously did not have it in Beijing, otherwise why not
9 V- m" Z; u% l$ F% e: ruse it and woo the audience at home?), based on data and rational derivation3 M* J5 o* S/ _, j$ X: n, @ T* K- S
. This article, however, can be interpreted as saying that all athletes are) \2 I5 {& t! |4 t
doping and the authorities are just not good enough to catch them. That may { }- g0 [- p1 d N2 e
be true, logically, but definitely will not make the case if there is ever a; O1 [3 t) l' l6 G' m1 U+ N
hearing by the governing body for water sports, FINA, to determine if Ye/ X. f0 Y/ | O
has doped. To ask whether it is possible to obtain a false negative in a7 K( J0 M/ e1 o
drug test looks like a rigged question to me. Of course it is possible: ^- v- Y7 P2 R5 _2 I0 X$ L: f' x* x& c
other than the athlete taking a drug that the test is not designed to detect
! v. X2 n( U7 }- | {6 A$ \& y, anyone who has taken quantum 101 will tell you that everything is5 [: O* |$ n3 E- g9 t. C& R
probabilistic in nature, and so there is a probability that the drug in an
8 {3 v1 E7 g$ e+ K6 G" ]1 mathlete’s system could tunnel out right at the moment of the test. A slight. |. T/ O& N+ a" {' A; Y
chance it may be, but should we disregard all test results because of it?2 T; U) |0 y% [* @6 z
Let’s be practical and reasonable, and accept that the World Anti-Doping2 @; I4 ^; p" a
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
/ X! S, H6 E3 S! }( D$ Neight years after the contest for future testing as technology advances.. {! V# q- z- k6 K7 k% @8 d
Innocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-$ A B% w* W7 r0 C+ A
competition drug test is already in effect, which Callaway failed to mention3 R6 A/ U+ t6 d8 s( K- z, ?
. As noted in the president of WADA’s press release, drug testing for
- ^. P7 E2 X9 s& mOlympians began at least six months before the opening of the London
/ N/ P- D& E; F/ u" Z! UOlympics. Furthermore, 107 athletes have been banned from this Olympics for1 q5 ^- P& W2 {% _8 M
doping. That may be the reason that “everyone will pass at the Olympic
: F7 M" y4 z% k0 F3 ~games. Hardly anyone fails in competition testing” — those who did dope
4 u0 w" e/ v0 C* h2 e! u0 ?have already been caught and sanctioned. Callaway is free to suggest that a
/ b: Z# Y7 s: T, m+ k+ l% k- tplayer could have doped beforehand and fooled the test at the game, but this
) m, Y) q B8 ]4 O6 w5 n8 Ppossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did ( B9 |$ Z5 U, p. E- f V
intentionally or not) cherry-pick data that, in my view, are far too
Y# h" ^$ T8 V4 B3 b* ?" B- fsuggestive to be fair and unbiased. If you want to cover a story of a
0 `9 V7 i3 |* \( c2 E/ fsuspected doping from a scientific point of view, be impartial and provide( p$ B/ S7 l: U
all the facts for the reader to judge. You are entitled to your
- n, r7 s, U" T& ]! H sinterpretation of the facts, and the expression thereof in your piece,% I: j( A% Z! Y5 L, h" J9 H
explicitly or otherwise, but showing only evidence that favours your; g' w- H( O- [% _" Q: F
argument is hardly good science or journalism. Such an article in a journal" Q& y( {/ ]. t2 o
such as Nature is not an appropriate example of how scientific research or6 V1 G/ {9 d6 J1 V! S
reporting should be done. |
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