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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
]: \* _+ G9 Z- X# S5 v! l2 [如果是中国长大的,英语能到这种程度真是很不简单。! i6 W8 h/ b" s5 G- |
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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. `% ^$ g6 R$ eFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself7 m6 G- I' ]3 z3 t% S2 y
, regard as one of the most prestigious and influential physical-science% m( |# q2 l/ ]9 T/ o
magazines — publish a thinly veiled biased article like this. Granted, this8 j) M% C; W# |7 c; M! ?# D
is not a peer-reviewed scientific article and did not go through the
2 }, C, ~+ h/ c V- Wscrutiny of picking referees. But to serve as a channel for the general% B7 h; h5 z8 j$ W
populace to be in touch with and appreciate science, the authors and editors
& Z& L4 \7 Y( u' \7 U: ?should at least present the readers with facts within the proper context,9 c0 Z2 E' G7 S. z
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
2 r6 e4 @) h" pOlympic 400-metre IM time with her performance at the World Championships in% J) B- y* ], G( q7 M
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “% s* r# z* `) D- D2 p3 n# |
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
+ ?% h+ d/ M" R+ I& P/ l Jpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
; m1 R( g$ P9 L2 x, f3 himprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the4 D* h, o* K& z4 j) A( D. E' ~- D
difference between the gold and silver medal, I see no reason for 5.38 s to& l0 z8 {' ?4 O# W& t
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
6 k) N. k8 W( u3 l4 Lstill developing. Bettering oneself by 5 seconds over two years may seem$ M4 q m9 f, i. F3 }
impossible for an adult swimmer, but it certainly happens among youngsters.
1 D+ j0 v5 |9 x8 T7 uAn interview with Australian gold medallist Ian Thorpe revealed that his 4008 x$ q! \8 P9 M# M
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.8 O% Q, D9 \( _
For regular people, including Callaway, it may be hard to imagine what an' B3 Y# r9 Q! {2 g+ x. s& Q/ M
elite swimmer can achieve as he or she matures and undergoes scientific and
3 }/ k1 V! L6 o3 _3 s: b0 V9 `' mpersistent training. But jumping to the conclusion that it is “anomalous”
$ i* T' O& I& g+ l' M( {6 Dbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.1 k$ N# i) w* E& u
( _8 L. z) s) B1 `Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
- ~- {7 ~+ {( f Dexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
% a5 `' |0 y. |. j d+ \the last 50 metres, but Lochte had a huge lead in the first 300 metres, so$ D; s. ]2 D: u1 R" ?
he chose not to push himself too hard and to conserve his energy for later) `& \, |: ?3 A+ k
events (whether this conforms to the Olympic spirit and the ‘use one’s
x$ z( l" a# @: D6 zbest efforts to win a match’ requirement that the Badminton World. f3 `' I, |* U% F, \* U& d
Federation recently invoked to disqualify four badminton pairs is another
! l7 \) \6 R" R# m# C" d4 Ltopic worth discussing, though probably not in Nature). Ye, on the other
' {. A3 ?6 c. T( n. F8 r1 u2 rhand, was trailing behind after the first 300 metres and relied on freestyle
N" d/ y5 l6 Q& F* m8 Z, in which she has an edge, to win the race. Failing to mention this
: n; i% n2 B$ e4 S6 kstrategic difference, as well as the fact that Lochte is 23.25 seconds0 ^& G: T6 c/ b, e
faster (4:05.18) than Ye overall, creates the illusion that a woman swam+ `, Q1 ?$ S* O: S1 j
faster than the best man in the same sport, which sounds impossible. Putting% G$ b$ r0 t7 n$ H6 }/ e
aside the gender argument, I believe this is still a leading question that
( E8 d& i: U% m, r nimplies to the reader that there is something fishy going on.
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4 Q V7 [0 w/ x( gFourth is another example of cherry-picking. In the same event, there are) x4 j0 }( a$ Z. z3 ]- k' a
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93( P! I% k) z4 N1 i
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s" Y% F: C' Y* f. J; e' n
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns' R$ p2 w5 k1 H
out, if we are just talking about the last 50 metres in a 400-metre IM,- v1 \* j! @) E5 u
Lochter is not the example I would have used if I were the author. What kind
/ S8 [0 I- e Z' X1 V/ L8 [of scientific rigorousness is Callaway trying to demonstrate here? Is it; V0 _8 h5 C& o; ~! H
logical that if Lochter is the champion, we should assume that he leads in. j/ Y) k) }& W$ q, h
every split? That would be a terrible way to teach the public how science! U% r% U. E, |. ]
works.
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4 ]) M- l/ m* N4 C2 lFifth is the issue I oppose the most. Callaway quotes Ross Tucker and3 a. D" I+ H1 c% W) W' j
implies that a drug test cannot rule out the possibility of doping. Is this
' N' Y$ i+ {3 Okind of agnosticism what Nature really wants to teach its readers? By that
- O0 P! w6 i( dstandard, I estimate that at least half of the peer-reviewed scientific$ l( V, {2 \" z8 f b- y2 t \
papers in Nature should be retracted. How can one convince the editors and3 t* C' T% p% ]/ O' T, m6 I) L5 z' \7 l6 [
reviewers that their proposed theory works for every possible case? One
8 ]) f( ]$ Q4 jcannot. One chooses to apply the theory to typical examples and to
1 x1 P" E: R% U1 o! [" B+ B3 P9 U. \demonstrate that in (hopefully) all scenarios considered, the theory works
8 C! }- m5 ^7 C/ p0 Oto a degree, and that that should warrant publication until a counterexample; J0 f# W4 r: f6 s/ R p# n" l
is found. I could imagine that Callaway has a sceptical mind, which is6 t& d- l( d! V
crucial to scientific thinking, but that would be put to better use if he
" }2 i3 B+ X7 ~1 g( D9 jwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
- {& P5 h9 y; o) b9 Z7 ^advanced, non-detectable drug that the Chinese have come up with in the. g1 r! D3 K! [. S, w' z
past 4 years (they obviously did not have it in Beijing, otherwise why not- X( J/ q7 h5 b! t& R; Y
use it and woo the audience at home?), based on data and rational derivation/ o; ~! {3 A! U6 ] n3 P k. N
. This article, however, can be interpreted as saying that all athletes are
) b( J9 x2 Q' C6 n, L6 a. s- qdoping and the authorities are just not good enough to catch them. That may
$ @3 f% Y3 E+ R5 n6 Qbe true, logically, but definitely will not make the case if there is ever a' v# O# x$ t5 X- H. y8 [9 Q5 v# k
hearing by the governing body for water sports, FINA, to determine if Ye
5 d% s/ k1 D4 c7 h8 D, Bhas doped. To ask whether it is possible to obtain a false negative in a9 X# P: A, z( m
drug test looks like a rigged question to me. Of course it is possible:" M8 v# U1 N$ ^" Q l0 |9 T
other than the athlete taking a drug that the test is not designed to detect
. @; d! \% _0 p, anyone who has taken quantum 101 will tell you that everything is0 W' [5 M/ O+ y: L) K4 I& e* a! P& `
probabilistic in nature, and so there is a probability that the drug in an# W% y/ H7 Q! b" K/ m
athlete’s system could tunnel out right at the moment of the test. A slight! n1 f$ I( p, ^6 j( H
chance it may be, but should we disregard all test results because of it?' O" p% z6 o; [" x/ G0 ]( F
Let’s be practical and reasonable, and accept that the World Anti-Doping. _/ K4 y. a" T( T; {
agency (WADA) is competent at its job. Ye’s urine sample will be stored for& J$ ]* b. E* N$ \/ C" t
eight years after the contest for future testing as technology advances.2 q4 {& o) d3 ?# e% ] }- r7 ]
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-, e, G8 a5 ^7 P. k
competition drug test is already in effect, which Callaway failed to mention. h6 S* w4 p6 P/ ]
. As noted in the president of WADA’s press release, drug testing for
6 B8 t; P" p1 S: {$ H7 kOlympians began at least six months before the opening of the London* q) p6 d- y( M' M
Olympics. Furthermore, 107 athletes have been banned from this Olympics for# S" }2 X% [! a2 u' {
doping. That may be the reason that “everyone will pass at the Olympic
% ^2 e6 k4 K. I. G' T( [5 x- x2 lgames. Hardly anyone fails in competition testing” — those who did dope
8 f) y( T: h" T$ V3 {4 C0 H' zhave already been caught and sanctioned. Callaway is free to suggest that a
4 A! M$ F* ]- j" k+ E* gplayer could have doped beforehand and fooled the test at the game, but this( K! w" b6 Z( V+ Q; f
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (( |4 {; ^0 [+ V. z
intentionally or not) cherry-pick data that, in my view, are far too
8 P9 \% J! ]( E0 N6 c) t5 lsuggestive to be fair and unbiased. If you want to cover a story of a
. x# A: X% s% e2 S0 jsuspected doping from a scientific point of view, be impartial and provide# \- _0 i0 r5 I& P u0 O3 [
all the facts for the reader to judge. You are entitled to your
) m% o4 k. q% K7 ^- k7 y; Finterpretation of the facts, and the expression thereof in your piece, z- T" l1 L1 ` N
explicitly or otherwise, but showing only evidence that favours your
8 N* F1 g! A, N- z& H- Z- p0 p, pargument is hardly good science or journalism. Such an article in a journal. A3 H' D- ]: b2 c9 w1 D7 m
such as Nature is not an appropriate example of how scientific research or; U6 p& O) J' C2 h: j
reporting should be done. |
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