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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
& ]* K4 ]. N+ i' a- g- g& l9 d/ |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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8 R! m" Q8 c: Y! dhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania% x; F7 ^( M( L2 e/ t4 n! w
. y; c! D/ H) S0 MIt is a shame to see Nature — which nearly all scientists, including myself* D1 `+ ^/ p: Z: l/ C
, regard as one of the most prestigious and influential physical-science
7 I2 l' s; M$ ?4 `# X% c* o) f" Tmagazines — publish a thinly veiled biased article like this. Granted, this
6 j1 n3 c# ]( @. X4 M. Jis not a peer-reviewed scientific article and did not go through the
( W5 t! }0 u5 D. Hscrutiny of picking referees. But to serve as a channel for the general& T. J0 l9 ?2 N6 K+ c" E8 \: a
populace to be in touch with and appreciate science, the authors and editors
$ Z# W, N# ?; q U; k6 Q9 o% @should at least present the readers with facts within the proper context,& X0 M3 |" A/ _ {+ L
which they blatantly failed to do.: q2 f) Z& Y5 o) d
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First, to identify Ye’s performance increase, Ewen Callaway compared her7 }1 J+ B6 N/ G \ M
Olympic 400-metre IM time with her performance at the World Championships in
4 e" E/ I" w3 \/ d3 z2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
2 f' b: [! ^: h- j! v2 _% q# aanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous# b& ~* O' h# @* f% x* Q
personal best was 4:33.79 at the Asian Games in 2010. This leads to an2 b0 e4 m0 _" ?6 y( W$ d
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
: {$ S3 D" E. x9 R0 v2 q0 \5 p jdifference between the gold and silver medal, I see no reason for 5.38 s to$ ^$ J$ u2 V' w* R6 g6 D
be treated as 7 s.& C( ]) a! |& e! T' R* ]% O
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Second, as previously pointed out, Ye is only 16 years old and her body is# i4 V( r( \6 ^
still developing. Bettering oneself by 5 seconds over two years may seem5 @3 L- o t2 ]! H
impossible for an adult swimmer, but it certainly happens among youngsters.
+ q3 ?, R, Y! o7 W+ m8 nAn interview with Australian gold medallist Ian Thorpe revealed that his 400
h7 ?3 R( p, d1 A4 } R-metre freestyle time improved by 5 seconds between the ages of 15 and 16./ |8 o+ \ X/ }* M9 U9 E
For regular people, including Callaway, it may be hard to imagine what an
% \4 T" O# U2 O) G7 H+ ^7 `6 {elite swimmer can achieve as he or she matures and undergoes scientific and1 t# D8 ?; i) m" d$ L" a$ k2 h
persistent training. But jumping to the conclusion that it is “anomalous”
. P/ |3 f& H$ l4 Q) m& Cbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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: |& H M$ G: y5 i/ |Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook/ a) X- J. N: D* f/ C5 |
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 ^: K" \, t) }& D
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so, n0 E% j3 l+ l7 R
he chose not to push himself too hard and to conserve his energy for later8 o( Y: w& b4 g) M W2 }: ?% g
events (whether this conforms to the Olympic spirit and the ‘use one’s
: @7 h5 ~% g+ Z" W' @) L( k6 Sbest efforts to win a match’ requirement that the Badminton World
% h0 ~2 K' q: K' Z5 u7 ZFederation recently invoked to disqualify four badminton pairs is another
( c! `. K1 b$ A% m. U D' r4 _topic worth discussing, though probably not in Nature). Ye, on the other2 ?. X& ]0 c) H+ L( f: z
hand, was trailing behind after the first 300 metres and relied on freestyle w: r( \% @8 t+ x' u& u
, in which she has an edge, to win the race. Failing to mention this& L: s) u8 ~; a2 e
strategic difference, as well as the fact that Lochte is 23.25 seconds
/ s2 k }- _8 N1 U }% |( ^faster (4:05.18) than Ye overall, creates the illusion that a woman swam
% k6 P' H2 ^$ c& p1 a! F% ^faster than the best man in the same sport, which sounds impossible. Putting& V0 x* U& J; X! Y/ e
aside the gender argument, I believe this is still a leading question that: h: q5 t0 w" }$ b2 e. ]7 {
implies to the reader that there is something fishy going on.* S Y- X6 Z1 E8 m
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Fourth is another example of cherry-picking. In the same event, there are* }! o7 o- Z3 G' A$ X. ]
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) L1 I& k4 z+ {9 [! ]
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s+ L# \- k1 p% \9 {
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% U8 _4 v! F$ `- C4 b1 zout, if we are just talking about the last 50 metres in a 400-metre IM,8 z8 u( n+ H2 m8 @; g3 ~+ V
Lochter is not the example I would have used if I were the author. What kind3 b" t) X: O% ]+ a- L/ ]1 S
of scientific rigorousness is Callaway trying to demonstrate here? Is it
- ]6 ~) l$ i1 z4 W; P- zlogical that if Lochter is the champion, we should assume that he leads in& S$ ?' v" ?. b/ G. o: H3 n. h
every split? That would be a terrible way to teach the public how science
. n3 O: e2 J0 T( O# t# Uworks.* |0 p1 T& Z( @
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
, a+ f$ D9 p" C( P6 z$ K0 f2 Y# Mimplies that a drug test cannot rule out the possibility of doping. Is this
! g4 z$ L8 b3 zkind of agnosticism what Nature really wants to teach its readers? By that& n# g/ B% L W2 P0 k
standard, I estimate that at least half of the peer-reviewed scientific
T+ x4 ^+ S/ N+ h; ^; O4 S6 {papers in Nature should be retracted. How can one convince the editors and7 B5 w* ^3 }( n$ N2 q/ V
reviewers that their proposed theory works for every possible case? One$ A0 Y, ^2 k6 n
cannot. One chooses to apply the theory to typical examples and to* D, {- w0 |! x8 O1 j4 d
demonstrate that in (hopefully) all scenarios considered, the theory works. s. ~/ d: R' }# Z' n- ]+ H0 ^7 x
to a degree, and that that should warrant publication until a counterexample
~' [5 `& X0 t6 C1 ?is found. I could imagine that Callaway has a sceptical mind, which is
: B7 }& d. b; f+ W6 Zcrucial to scientific thinking, but that would be put to better use if he
/ B+ E0 {5 q6 e8 e; {2 ?& owrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
" O6 H" F+ Z, |) o) |advanced, non-detectable drug that the Chinese have come up with in the
. W* G6 G0 g& ^* B; i& Npast 4 years (they obviously did not have it in Beijing, otherwise why not9 v' Q8 g# k5 D& A" i
use it and woo the audience at home?), based on data and rational derivation
6 e! x9 r7 N/ {& i% x- r. This article, however, can be interpreted as saying that all athletes are* _# }( H) t" a, c; l) h
doping and the authorities are just not good enough to catch them. That may$ ~+ ^3 x- @4 J9 k: I) ]- r% z z; B6 R
be true, logically, but definitely will not make the case if there is ever a
" l; h4 H0 e, T% |9 w( E% n" ohearing by the governing body for water sports, FINA, to determine if Ye
( o: S; ~/ c4 b* @% F4 z2 ]has doped. To ask whether it is possible to obtain a false negative in a
5 Q) A6 C/ e* j1 @* t3 }drug test looks like a rigged question to me. Of course it is possible:: f) R# ], G+ R( i
other than the athlete taking a drug that the test is not designed to detect
/ M2 p1 }' J$ X4 \) @, D, anyone who has taken quantum 101 will tell you that everything is' b; P: T0 H" o k; w5 g% a
probabilistic in nature, and so there is a probability that the drug in an
, x. l* h& b: mathlete’s system could tunnel out right at the moment of the test. A slight
" |: C/ J! N5 h( Qchance it may be, but should we disregard all test results because of it?2 P. ^# i2 R3 S) K4 G$ p. J P% S
Let’s be practical and reasonable, and accept that the World Anti-Doping
4 C0 ?- L) Z+ t1 d: w$ n+ xagency (WADA) is competent at its job. Ye’s urine sample will be stored for8 A( }5 g7 ~. C' Z+ j
eight years after the contest for future testing as technology advances.
6 `8 V! Y4 H+ k) @Innocent until proven guilty, shouldn’t it be?' n& g3 c: v, R6 n3 L! p2 L
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Sixth, and the last point I would like to make, is that the out-of-
0 z; y9 a$ w7 d5 Kcompetition drug test is already in effect, which Callaway failed to mention( T- U9 k- `0 U. ?# X
. As noted in the president of WADA’s press release, drug testing for
. l6 Q3 \( T, B! Z0 U! p3 E8 @Olympians began at least six months before the opening of the London
3 A5 _9 H/ M) b# ?! P2 s3 zOlympics. Furthermore, 107 athletes have been banned from this Olympics for
+ a2 v' M7 S7 pdoping. That may be the reason that “everyone will pass at the Olympic; k% Y0 U* j' P- p+ A0 S, I+ g
games. Hardly anyone fails in competition testing” — those who did dope& F) m6 d Q8 }! F
have already been caught and sanctioned. Callaway is free to suggest that a
' o8 }# P: d4 \6 L( `# C: ^player could have doped beforehand and fooled the test at the game, but this
6 e, L5 `0 \4 ]% P1 r; S1 N5 Epossibility is certainly ruled out for Ye.
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' [6 N8 M+ s N9 u9 j0 ~' F+ JOver all, even though Callaway did not falsify any data, he did (
1 b- O6 u% g- ?% Eintentionally or not) cherry-pick data that, in my view, are far too
1 _# H( S1 Q6 H% P1 @ ]suggestive to be fair and unbiased. If you want to cover a story of a# Z; N' Z8 ]+ _1 j' A
suspected doping from a scientific point of view, be impartial and provide
9 K( w J* L; t3 m: s+ rall the facts for the reader to judge. You are entitled to your
, c+ p1 U8 s: R* n5 _( M, N5 {interpretation of the facts, and the expression thereof in your piece,
2 ^+ i- _! w8 [& S vexplicitly or otherwise, but showing only evidence that favours your3 E+ d d `% V& H, v# R( A
argument is hardly good science or journalism. Such an article in a journal
) H& f0 O# C9 a$ b5 Bsuch as Nature is not an appropriate example of how scientific research or1 J. u& h; W6 c& W; l
reporting should be done. |
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