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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
0 d% p9 R3 A& J如果是中国长大的,英语能到这种程度真是很不简单。. U) e r8 A7 j/ S
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html. P8 C+ W- e/ M8 Y& l
; s* ^/ X6 ~( h' D! E BFROM 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
" k; x; {' k7 L. @( B) x' d, regard as one of the most prestigious and influential physical-science
! R* ^' s l. a; d X. P2 w; l- jmagazines — publish a thinly veiled biased article like this. Granted, this
4 i- i x- \- L0 _9 {9 i) Yis not a peer-reviewed scientific article and did not go through the X4 l5 H* Z& L: o8 p4 O
scrutiny of picking referees. But to serve as a channel for the general
* b# a) M6 W I% ~populace to be in touch with and appreciate science, the authors and editors
; i9 b3 ^4 L8 J! O9 N. \should at least present the readers with facts within the proper context,9 J0 {& P. n9 e
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her4 P4 d% S) D/ y, ?
Olympic 400-metre IM time with her performance at the World Championships in; h$ M1 F+ } Z- d# u" s9 v
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
; D( a* i2 z/ Fanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
5 o7 w. a9 D( H. y$ s: k/ Npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an/ ?+ k9 H! D) o' x- y" L- N, X
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the' D" Z# X! J9 a" ^7 c
difference between the gold and silver medal, I see no reason for 5.38 s to
% f, P. n6 w- X' [- ybe treated as 7 s. Q; `2 X* i5 t* Z
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Second, as previously pointed out, Ye is only 16 years old and her body is: a3 {5 X1 O% X- e$ e& Q0 _
still developing. Bettering oneself by 5 seconds over two years may seem P$ p9 C* K+ V, A5 F
impossible for an adult swimmer, but it certainly happens among youngsters.6 }# H5 B$ h, t% N% e- o, k; C! P
An interview with Australian gold medallist Ian Thorpe revealed that his 400- S8 L/ G/ z! Z( Z
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
( Z' z9 _1 k9 NFor regular people, including Callaway, it may be hard to imagine what an6 i/ j& {! Y3 B2 P) D) C; K, G
elite swimmer can achieve as he or she matures and undergoes scientific and
: I' s1 J% l# o! i( Q& S, }) B5 O4 O R/ Y; Hpersistent training. But jumping to the conclusion that it is “anomalous”
+ e3 g2 u+ \7 K4 a5 P9 k' K4 C9 [based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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0 c5 E0 B9 p( e# N3 v/ y" q1 RThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook4 {4 p' Q; K; C& R. _$ T
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in1 b4 v. H) ]9 c3 S! \ c
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so/ j$ h8 R% e4 F `- E+ `
he chose not to push himself too hard and to conserve his energy for later
) L" M3 y- Q* q% b1 [' ievents (whether this conforms to the Olympic spirit and the ‘use one’s
+ G8 \: y! U8 N" qbest efforts to win a match’ requirement that the Badminton World( f" |$ X& F. p( p6 q
Federation recently invoked to disqualify four badminton pairs is another" ?0 h: R# i! }3 K
topic worth discussing, though probably not in Nature). Ye, on the other- }7 F+ f( K6 C5 H- l
hand, was trailing behind after the first 300 metres and relied on freestyle
8 A0 p: V2 }2 ~" M# A) K, in which she has an edge, to win the race. Failing to mention this8 Z9 T# J: N6 A0 r
strategic difference, as well as the fact that Lochte is 23.25 seconds
2 f1 y: [+ m5 j1 @- o( ]faster (4:05.18) than Ye overall, creates the illusion that a woman swam/ s3 M& i- A" |% W1 N( j% g1 H
faster than the best man in the same sport, which sounds impossible. Putting
1 A8 K' G/ {( @' b; baside the gender argument, I believe this is still a leading question that
# L8 a# J3 b9 n1 c/ c8 ximplies 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. q6 ^! Z2 a5 ]) j! ^( E4 C
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
; f6 q7 q$ ~/ o" }s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
* f8 B5 X i" T) |2 p% h), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
, |; S, E- I" b- ^4 h& t5 Mout, if we are just talking about the last 50 metres in a 400-metre IM,, B9 Q1 J, l. G5 e4 Z: z7 g* q
Lochter is not the example I would have used if I were the author. What kind
2 ~9 r- S$ B# w2 c$ B+ oof scientific rigorousness is Callaway trying to demonstrate here? Is it& Q c8 c1 W1 H
logical that if Lochter is the champion, we should assume that he leads in
( o* s8 Y( J G, r! J9 X( Cevery split? That would be a terrible way to teach the public how science
* d2 i$ d# M" v, \' ^5 ~, i# pworks.) {9 u; q- _# L; y; a7 q
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and/ P- c3 ^% O1 k& X" w6 X
implies that a drug test cannot rule out the possibility of doping. Is this* E" b# f& G& X
kind of agnosticism what Nature really wants to teach its readers? By that- B$ c, c) L" O
standard, I estimate that at least half of the peer-reviewed scientific+ [( r' `% E: p
papers in Nature should be retracted. How can one convince the editors and* |# P- |$ O' N# a+ D9 X+ ~: L0 e: W
reviewers that their proposed theory works for every possible case? One- v6 P, d3 P" ]& {% f! N$ C
cannot. One chooses to apply the theory to typical examples and to
9 B) a: o6 U5 E7 R4 gdemonstrate that in (hopefully) all scenarios considered, the theory works
$ y/ }( C6 C- `/ Zto a degree, and that that should warrant publication until a counterexample
% k0 [- `( u6 g* m. h% x- fis found. I could imagine that Callaway has a sceptical mind, which is
; ]9 P# j# j5 l2 i( E" Icrucial to scientific thinking, but that would be put to better use if he. P* h' }1 @' |" ?+ l/ m* J; w
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly3 B4 C( e) h; ~4 C \
advanced, non-detectable drug that the Chinese have come up with in the
! r: B4 Q( t1 C {- H0 ^- H' S, rpast 4 years (they obviously did not have it in Beijing, otherwise why not% x, H. \( W# O) S& A7 \8 \
use it and woo the audience at home?), based on data and rational derivation
* H2 H2 I; v3 [/ g9 G- y8 e: i% C w" a. This article, however, can be interpreted as saying that all athletes are
2 v0 N3 ?5 z0 ]/ |( h, ]doping and the authorities are just not good enough to catch them. That may* _% G2 s2 |* \) E+ {
be true, logically, but definitely will not make the case if there is ever a
: M, m( W6 g) S; T1 c& B4 lhearing by the governing body for water sports, FINA, to determine if Ye& u4 q7 w: X+ i/ l: i' s
has doped. To ask whether it is possible to obtain a false negative in a
$ V0 Y- ~0 S: ]2 Gdrug test looks like a rigged question to me. Of course it is possible:3 U1 w I/ ]1 m: U* V- X; J
other than the athlete taking a drug that the test is not designed to detect
& ?' k3 j6 _7 H2 r, ^9 T3 F$ z2 e! o, anyone who has taken quantum 101 will tell you that everything is
; X/ F2 i4 N) o: o& r1 F, |$ ]probabilistic in nature, and so there is a probability that the drug in an
# }) y, E" w$ h& D$ B) Bathlete’s system could tunnel out right at the moment of the test. A slight
( F% U5 C% x3 Y f. c4 {& Vchance it may be, but should we disregard all test results because of it?9 ^8 c9 D F6 R5 ]# m, K* z J
Let’s be practical and reasonable, and accept that the World Anti-Doping
0 l: Y# `. X4 T$ B/ kagency (WADA) is competent at its job. Ye’s urine sample will be stored for4 _* p% I: c ^
eight years after the contest for future testing as technology advances.
, R ]+ S* @9 s2 y8 q4 p. XInnocent until proven guilty, shouldn’t it be?) d5 c- W1 X# E6 [
1 d7 F6 N' Y" F9 L" oSixth, and the last point I would like to make, is that the out-of-: K$ G% b- }7 Q6 v# c7 k' x
competition drug test is already in effect, which Callaway failed to mention0 A& T. U* c! f2 d% d
. As noted in the president of WADA’s press release, drug testing for
+ t1 p9 D$ x K" z6 ^% H$ h% P( ]) POlympians began at least six months before the opening of the London4 K2 M7 j7 j/ I8 O
Olympics. Furthermore, 107 athletes have been banned from this Olympics for0 J- [; i9 H4 f2 H, n8 l
doping. That may be the reason that “everyone will pass at the Olympic
5 [1 e; E' ? |! Y2 y" ]games. Hardly anyone fails in competition testing” — those who did dope
9 p7 q# E, J& u( u$ A# x/ e. P( L) Nhave already been caught and sanctioned. Callaway is free to suggest that a
' b+ r( P! z/ x8 k) Bplayer could have doped beforehand and fooled the test at the game, but this
4 X% a! ~& J1 p& {1 j" ?' v' @possibility is certainly ruled out for Ye., i( C( g3 C; a
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Over all, even though Callaway did not falsify any data, he did (
) E# I2 Y2 T( Y k9 [9 Aintentionally or not) cherry-pick data that, in my view, are far too
U( x1 Y/ K5 H x6 I [suggestive to be fair and unbiased. If you want to cover a story of a
: j A4 C* S8 X% w5 o8 ssuspected doping from a scientific point of view, be impartial and provide9 L* l! q8 C+ a$ b( p
all the facts for the reader to judge. You are entitled to your
" J) ~2 w, x- I3 l' x) Z# M% V4 s8 Linterpretation of the facts, and the expression thereof in your piece,9 F4 a' W6 O6 Q, A$ I8 |
explicitly or otherwise, but showing only evidence that favours your7 y# }: w" S$ i) z
argument is hardly good science or journalism. Such an article in a journal9 F6 z6 S$ v* d- z. |9 b$ ~
such as Nature is not an appropriate example of how scientific research or
- V+ J: |/ \9 Q$ S& x- |* n- Wreporting should be done. |
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