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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- a3 t0 U! ], Z2 b$ Y! S
如果是中国长大的,英语能到这种程度真是很不简单。& l; D5 n/ g: S( f+ |! A9 h
3 N5 F, K% D' R% ~. e* ~$ |http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html u- x& u9 J o" ^: P1 H# p# E |5 ~
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania% W# ?# n( _6 Q" y- i
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It is a shame to see Nature — which nearly all scientists, including myself
- I, s9 T1 J' n, regard as one of the most prestigious and influential physical-science
- t L, J3 V) \3 k9 }& g* K) q# qmagazines — publish a thinly veiled biased article like this. Granted, this9 T6 j j! I3 d) P$ F
is not a peer-reviewed scientific article and did not go through the Y. i @7 ^$ e
scrutiny of picking referees. But to serve as a channel for the general
, M" u: _5 n4 j" I% l9 d9 b$ Bpopulace to be in touch with and appreciate science, the authors and editors
5 g4 L( e- K7 l- xshould at least present the readers with facts within the proper context, [/ x f& `5 _) ?: {9 Q
which they blatantly failed to do.% ]) E/ L; @7 d- x$ W; |1 r3 N
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First, to identify Ye’s performance increase, Ewen Callaway compared her
, l: R" s/ B( MOlympic 400-metre IM time with her performance at the World Championships in
# m2 ^/ v5 b/ U3 E2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
0 R- c5 S$ D4 S& b" \! j7 hanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
* R1 g+ T4 A# v: Dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an- |: {; \ ^6 h g. g0 Q, B/ ?
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the5 a8 \* E0 h4 z, i9 S* D
difference between the gold and silver medal, I see no reason for 5.38 s to
/ A2 P6 U. b7 ~+ o* b- Obe treated as 7 s.
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( ~7 f5 Z+ t! y4 }3 qSecond, as previously pointed out, Ye is only 16 years old and her body is2 e) \# O9 i0 i5 Y/ o5 L5 Z+ f7 {& V
still developing. Bettering oneself by 5 seconds over two years may seem
! c( x& A. f" Z' w: m a1 cimpossible for an adult swimmer, but it certainly happens among youngsters.
% L* e2 }( ]9 E5 dAn interview with Australian gold medallist Ian Thorpe revealed that his 400
0 f, `4 C/ S; w; P! m8 u) v-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
$ ]4 C7 @, c9 aFor regular people, including Callaway, it may be hard to imagine what an% s# H) M* Y. _; B" t# o9 m3 g l
elite swimmer can achieve as he or she matures and undergoes scientific and
4 P5 Z Y9 N& m2 Wpersistent training. But jumping to the conclusion that it is “anomalous”( w, F) q1 `( Z& S! O
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound. m6 p" b3 u1 v( b8 G o8 |5 }) u
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
" J0 R' v5 A! g' s1 P _example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
. x% x' e$ z! E$ i/ N2 j7 S: Qthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so5 }. t) D" [/ U' B6 {
he chose not to push himself too hard and to conserve his energy for later% g- `2 t+ @$ z5 m1 N
events (whether this conforms to the Olympic spirit and the ‘use one’s
7 k+ l, H. c( ?best efforts to win a match’ requirement that the Badminton World
_2 v) `1 w# ^' SFederation recently invoked to disqualify four badminton pairs is another, j% z2 j9 b$ B1 m! W' T. n7 D- y% S
topic worth discussing, though probably not in Nature). Ye, on the other; f L2 B" _& t8 g: T
hand, was trailing behind after the first 300 metres and relied on freestyle
7 k& a2 T* g* s8 @) e: O: R, in which she has an edge, to win the race. Failing to mention this3 r4 p4 Y0 T; x8 v5 q
strategic difference, as well as the fact that Lochte is 23.25 seconds
9 w, h2 Z. e6 M) y1 x3 ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam) I' v5 z8 |: G( {4 u
faster than the best man in the same sport, which sounds impossible. Putting
; F' \& `& I) [* f% S8 _aside the gender argument, I believe this is still a leading question that
5 P' X, W H! ^ Wimplies 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
+ m! k! l3 S, j7 v9 c( f7 Kfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
3 v; A. y6 r, m8 q$ z9 k Z* K( cs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s8 N" V3 F9 ~ Q1 P
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns9 F! O# y1 ~1 x
out, if we are just talking about the last 50 metres in a 400-metre IM,& M* L8 T3 r9 u2 b, h; Z2 V5 C
Lochter is not the example I would have used if I were the author. What kind
% I- u$ V& ~+ w5 |8 \% U5 f) Pof scientific rigorousness is Callaway trying to demonstrate here? Is it: {) Y* k7 F! u/ L
logical that if Lochter is the champion, we should assume that he leads in- p7 \7 y7 p. A( L. ^
every split? That would be a terrible way to teach the public how science$ V$ J) V' Q3 l N
works.
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3 s, J5 S5 G: ]4 Z6 O. K& h0 g! R2 _Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
& l! b# |& a0 _4 [implies that a drug test cannot rule out the possibility of doping. Is this, C5 G: [& k3 o
kind of agnosticism what Nature really wants to teach its readers? By that: a' J1 v# }7 i1 P
standard, I estimate that at least half of the peer-reviewed scientific
7 ]5 y, T9 ?) w; `* W9 K x e$ epapers in Nature should be retracted. How can one convince the editors and
9 C) m9 d5 u3 ?: n' q/ R$ a( T% ?reviewers that their proposed theory works for every possible case? One
n$ w- l* {* ]7 S5 a9 ]/ ]) Kcannot. One chooses to apply the theory to typical examples and to( n* u% J6 N. t! t/ Y% e. C
demonstrate that in (hopefully) all scenarios considered, the theory works
+ ?. C( D! S5 G6 Bto a degree, and that that should warrant publication until a counterexample
) F; O! T9 f! l8 G! ?is found. I could imagine that Callaway has a sceptical mind, which is
3 j0 i! j1 }0 ^8 Ncrucial to scientific thinking, but that would be put to better use if he
# t7 |. b8 n( ]+ f- Mwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) N4 W1 v- Q% t/ |
advanced, non-detectable drug that the Chinese have come up with in the5 D1 U; p3 O' c; A
past 4 years (they obviously did not have it in Beijing, otherwise why not
' T/ X! j. T" [0 D0 C% [8 v. Q) Xuse it and woo the audience at home?), based on data and rational derivation6 h0 O2 E. K2 D7 X: W. d
. This article, however, can be interpreted as saying that all athletes are
" Z A. ]7 P, X+ Y8 Z$ jdoping and the authorities are just not good enough to catch them. That may" \/ t" v s9 A1 D3 N4 V( o8 z
be true, logically, but definitely will not make the case if there is ever a
* ~% B; M9 v" n+ X3 G: Dhearing by the governing body for water sports, FINA, to determine if Ye
3 [, c. n! B7 D3 \; Dhas doped. To ask whether it is possible to obtain a false negative in a) w. c2 R% _) u) E
drug test looks like a rigged question to me. Of course it is possible:
) N! z5 ]/ n3 d: W$ b, yother than the athlete taking a drug that the test is not designed to detect+ p& F0 ~: }4 C0 P2 f! b0 ^& x
, anyone who has taken quantum 101 will tell you that everything is
- o$ Q, H+ ?% u4 z6 n$ a% x1 {probabilistic in nature, and so there is a probability that the drug in an
* r6 N0 t+ V* [5 yathlete’s system could tunnel out right at the moment of the test. A slight
/ r3 e$ g- m9 F; Jchance it may be, but should we disregard all test results because of it?1 O3 Y2 p( {3 b2 g
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 ^6 U* X- w% R. a" z6 magency (WADA) is competent at its job. Ye’s urine sample will be stored for+ Y% }, d' O/ M0 ~% g6 @& u
eight years after the contest for future testing as technology advances.3 U3 Z4 a1 w) _
Innocent until proven guilty, shouldn’t it be?
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2 G' z3 r) `1 J) c4 N2 @0 TSixth, and the last point I would like to make, is that the out-of-1 g/ X! r( I9 b Y0 |
competition drug test is already in effect, which Callaway failed to mention
' {; R' L4 C6 l+ C( S/ d7 t+ o. As noted in the president of WADA’s press release, drug testing for
3 z( S/ L7 e# X8 eOlympians began at least six months before the opening of the London7 w: ]. k" K6 l* R. m
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
- J2 A; l3 t6 Idoping. That may be the reason that “everyone will pass at the Olympic- n6 ]1 T# ]) O/ P/ X
games. Hardly anyone fails in competition testing” — those who did dope
/ j) s. B S$ Q* W& A$ Thave already been caught and sanctioned. Callaway is free to suggest that a
9 D' f/ Q9 ^4 Qplayer could have doped beforehand and fooled the test at the game, but this
" k7 o7 H, S4 u/ z; Z. Ppossibility is certainly ruled out for Ye. N6 s& b: d) V; o2 r
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Over all, even though Callaway did not falsify any data, he did (
# q: L Q/ ?2 }) tintentionally or not) cherry-pick data that, in my view, are far too
8 A3 R, z9 f5 B# {2 p5 Vsuggestive to be fair and unbiased. If you want to cover a story of a) E6 {' T6 e" N6 E* y6 v
suspected doping from a scientific point of view, be impartial and provide
/ L" U- d6 r% @all the facts for the reader to judge. You are entitled to your
7 N5 ~; U- e- v+ y. a; dinterpretation of the facts, and the expression thereof in your piece,+ g0 n I' ^0 m+ u
explicitly or otherwise, but showing only evidence that favours your4 a L; O0 ^# _1 X3 ^. _
argument is hardly good science or journalism. Such an article in a journal
, C- a! i6 |9 R, _! U& h& }, ]5 ?such as Nature is not an appropriate example of how scientific research or
7 G1 z& f* T# L: r9 e0 C, Creporting should be done. |
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