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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
) a" Y+ j* ?$ ~" \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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' L! ]( q6 n9 G8 u. ^http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html; d) ]' ~& ^3 g, A4 Z& E0 Q
8 ]8 J x* y ?FROM LAI JIANG, Department of Chemistry, University of Pennsylvania! B I* ^2 @, E5 B6 o3 T# s; Q( @# B
4 G" ~+ R. n5 n8 O7 UIt is a shame to see Nature — which nearly all scientists, including myself
* s: ~7 F* @; S. c/ |* h, j1 j, regard as one of the most prestigious and influential physical-science
3 R2 ^1 T6 m3 p4 P- D9 R- xmagazines — publish a thinly veiled biased article like this. Granted, this6 U1 H: @2 u: o5 \+ H8 z/ U
is not a peer-reviewed scientific article and did not go through the
' q+ r0 J0 x/ W6 X; E* bscrutiny of picking referees. But to serve as a channel for the general
6 W7 r$ @; i1 ~; y# G9 \populace to be in touch with and appreciate science, the authors and editors
. n0 M X0 j8 ] ?) C. L* c8 Fshould at least present the readers with facts within the proper context,
/ j+ B: x! w" B0 b7 F( Wwhich they blatantly failed to do.+ M# n1 V' k8 g$ w
+ t2 e8 A, ?/ J1 Z- y" c
First, to identify Ye’s performance increase, Ewen Callaway compared her2 c% ?4 c. w' b
Olympic 400-metre IM time with her performance at the World Championships in
8 B) `. o/ f' e' }$ D, _2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
$ t: O! k& [; q kanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous$ k( i( j* n7 T+ _/ C# l
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
: P p. E3 `( F1 A$ _0 j& A5 simprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ a& `9 [+ u v
difference between the gold and silver medal, I see no reason for 5.38 s to! h! E* a A+ w( e* W" o
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is3 w- z6 N# ~& p& Y
still developing. Bettering oneself by 5 seconds over two years may seem
3 O A J" Q2 F0 R# [1 ]! qimpossible for an adult swimmer, but it certainly happens among youngsters.
7 ?, e$ e/ X$ ?2 r5 O$ [; jAn interview with Australian gold medallist Ian Thorpe revealed that his 400
; b1 \6 `- K3 |' e7 f-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
! M- Y' n' v5 q" M; C6 \For regular people, including Callaway, it may be hard to imagine what an) F) l/ i( t w- _( ~! \9 W
elite swimmer can achieve as he or she matures and undergoes scientific and
5 K% A1 }. [/ fpersistent training. But jumping to the conclusion that it is “anomalous”9 f. q% O4 R5 C& `1 w V7 r; t& i
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.) x( n( B8 W' \' G. @' \
/ @# u( [/ \ m$ j) V8 pThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
2 P0 N/ r; i& x7 c2 h1 e4 m Eexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 g9 M" T2 d S) H$ p
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so7 [' v* n: l, Y+ H5 L! ^; F; u
he chose not to push himself too hard and to conserve his energy for later. n9 F8 g6 a1 o9 `/ a- E) ]
events (whether this conforms to the Olympic spirit and the ‘use one’s
- P7 w8 v# H/ Qbest efforts to win a match’ requirement that the Badminton World
0 v( X' Y# |9 r" FFederation recently invoked to disqualify four badminton pairs is another2 @9 U8 d& N. L% ~6 X7 C
topic worth discussing, though probably not in Nature). Ye, on the other5 r% p7 E! u, Q; b; c
hand, was trailing behind after the first 300 metres and relied on freestyle2 F% q0 S* l8 ~" ]+ X. v
, in which she has an edge, to win the race. Failing to mention this
4 _: t3 m! F9 m0 w# Ystrategic difference, as well as the fact that Lochte is 23.25 seconds
$ [$ S0 u. ?9 K- `( p8 Ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam
# I0 j7 t% \, x; R% k9 [. lfaster than the best man in the same sport, which sounds impossible. Putting
Y3 V/ I! G$ ~. u' W0 K- `aside the gender argument, I believe this is still a leading question that
: ~& @ T* B. P8 h2 d: a% Iimplies to the reader that there is something fishy going on.
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p. b: T; `/ [) S- Y: EFourth is another example of cherry-picking. In the same event, there are0 c" K0 k, ~$ o- z4 b3 f
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
! u6 ^" N# J. W+ ^* C0 f5 cs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
4 n Y5 `7 t; A0 y+ \9 r) U), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns+ O% B+ q$ w, K* `- ^' |& M4 ^
out, if we are just talking about the last 50 metres in a 400-metre IM,: ~* E* Q; S, o. c5 W' b
Lochter is not the example I would have used if I were the author. What kind8 ^ U! h7 w2 C/ U# H
of scientific rigorousness is Callaway trying to demonstrate here? Is it
! i2 R5 k! i' S4 ?7 q7 ~1 Ilogical that if Lochter is the champion, we should assume that he leads in& ?# Q" h: _1 ^; ]( u/ V
every split? That would be a terrible way to teach the public how science
( A0 Y7 V6 j/ ]; F) Gworks.; a9 l( A: X! A# d7 h" M
/ g' R' A% J2 z- H# _7 jFifth is the issue I oppose the most. Callaway quotes Ross Tucker and( q5 Z+ L7 `- S# V" ?$ H
implies that a drug test cannot rule out the possibility of doping. Is this
9 y4 Z, S" e; C1 A2 p; a2 Akind of agnosticism what Nature really wants to teach its readers? By that0 [2 |* t3 M, x/ x
standard, I estimate that at least half of the peer-reviewed scientific8 k9 t$ d6 E$ p7 W2 P0 h& b
papers in Nature should be retracted. How can one convince the editors and; T# n/ R/ ~( d5 C
reviewers that their proposed theory works for every possible case? One
, `! _* w; u7 T# U4 Acannot. One chooses to apply the theory to typical examples and to
5 `6 S: l% [3 \* ddemonstrate that in (hopefully) all scenarios considered, the theory works6 |# ~0 @: z* O$ l$ X
to a degree, and that that should warrant publication until a counterexample7 A/ d2 E' q; p) G. E$ U- y; r
is found. I could imagine that Callaway has a sceptical mind, which is7 I# b9 d0 O8 ] u# w7 m+ x
crucial to scientific thinking, but that would be put to better use if he
, ]' `0 d( L4 _5 a2 A4 uwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
1 k3 E6 |' W2 C5 ^advanced, non-detectable drug that the Chinese have come up with in the. y" y5 V& W9 U' ~
past 4 years (they obviously did not have it in Beijing, otherwise why not
: F$ I4 G s8 V) O0 N* x% yuse it and woo the audience at home?), based on data and rational derivation
; P9 c$ C; t" f/ t( c0 ]2 G. This article, however, can be interpreted as saying that all athletes are0 x4 q4 Y! S' o1 Y4 N" O
doping and the authorities are just not good enough to catch them. That may5 ^5 ]/ _; _8 V3 y
be true, logically, but definitely will not make the case if there is ever a
, ^6 R: d* \' J1 hhearing by the governing body for water sports, FINA, to determine if Ye, R M0 D* ~# e. d: B
has doped. To ask whether it is possible to obtain a false negative in a$ k% ^! v4 u( t
drug test looks like a rigged question to me. Of course it is possible:6 [' L- C7 X3 E0 d
other than the athlete taking a drug that the test is not designed to detect
: P, ~5 u( W a1 j+ K2 i, m$ ?) h# l, anyone who has taken quantum 101 will tell you that everything is! ]/ ]1 R) _6 T+ N! W
probabilistic in nature, and so there is a probability that the drug in an
% q7 k/ }6 \) p8 u1 tathlete’s system could tunnel out right at the moment of the test. A slight2 ?9 K5 C( D6 ^. D
chance it may be, but should we disregard all test results because of it?; t& |0 Y: d1 V- K" ~1 q1 m
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 u# B% ^% ? D* Q1 fagency (WADA) is competent at its job. Ye’s urine sample will be stored for
1 t) X& Q* J. K0 u6 g5 @& H) H5 Zeight years after the contest for future testing as technology advances.7 J4 z: R P0 e Y6 o7 M
Innocent until proven guilty, shouldn’t it be?* g; \9 s; {! X1 E4 b7 N# q
8 }5 E2 H' x4 R2 tSixth, and the last point I would like to make, is that the out-of-
; i$ Z6 w7 s3 Z- W( xcompetition drug test is already in effect, which Callaway failed to mention' b+ [% I4 |( |$ u& r+ I; C! S( s6 D. y
. As noted in the president of WADA’s press release, drug testing for
9 X5 E6 X. c: \) A2 l- R# c" c* _) eOlympians began at least six months before the opening of the London
5 L% r" w0 d* A- F& f+ j rOlympics. Furthermore, 107 athletes have been banned from this Olympics for+ s+ F/ Q0 x' E( z- u; E
doping. That may be the reason that “everyone will pass at the Olympic8 ?0 _- u$ [! d8 y# Y
games. Hardly anyone fails in competition testing” — those who did dope
# P" Q# s/ \7 O( O, P5 lhave already been caught and sanctioned. Callaway is free to suggest that a
3 f2 x4 V# |9 Z1 R+ t0 Pplayer could have doped beforehand and fooled the test at the game, but this
% J$ p5 m! [" Epossibility is certainly ruled out for Ye.& e7 v! `+ h1 M
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Over all, even though Callaway did not falsify any data, he did (
- D1 k& [- M3 J( Pintentionally or not) cherry-pick data that, in my view, are far too8 x, Z3 _8 l3 T7 u u, w
suggestive to be fair and unbiased. If you want to cover a story of a
1 n4 S6 r6 T: u, l$ Qsuspected doping from a scientific point of view, be impartial and provide3 S4 C8 x" p; v# b
all the facts for the reader to judge. You are entitled to your# u5 U( ^& m& R" r* [
interpretation of the facts, and the expression thereof in your piece,2 y% \5 r, w4 a8 Q& u
explicitly or otherwise, but showing only evidence that favours your
9 _6 y; @) c, C( \ d, Sargument is hardly good science or journalism. Such an article in a journal9 E7 \+ R5 M; j8 J9 ~( j9 S
such as Nature is not an appropriate example of how scientific research or& S5 Z) N& ~& c& E. E
reporting should be done. |
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