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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! @* u5 [; G8 Y8 m9 c0 M9 c
如果是中国长大的,英语能到这种程度真是很不简单。! U) X. l/ ]% q% [
* ] O' [' D4 j6 a, Thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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' `5 ~: U" v& T8 \1 fFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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, d/ V2 ~ [3 WIt is a shame to see Nature — which nearly all scientists, including myself
8 j; X- m1 Z- T- I, regard as one of the most prestigious and influential physical-science
2 B6 ]: H/ @' }5 X7 Wmagazines — publish a thinly veiled biased article like this. Granted, this6 g. k& w2 d$ s1 i2 [) C
is not a peer-reviewed scientific article and did not go through the. H' b+ E3 L2 j0 e' j
scrutiny of picking referees. But to serve as a channel for the general
* D, T2 u: F6 P1 T) [populace to be in touch with and appreciate science, the authors and editors
9 v+ M9 D8 n% F/ oshould at least present the readers with facts within the proper context,* S! M& T" U6 c) Z& d7 e
which they blatantly failed to do.
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1 f3 k: }! v5 a' u. W, HFirst, to identify Ye’s performance increase, Ewen Callaway compared her: N1 a7 I: t) J! {8 a! V9 L
Olympic 400-metre IM time with her performance at the World Championships in$ a2 }+ o& Z+ D3 p& K& S
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
* o D/ z7 s2 Janomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
' x, j, |1 L( f3 e$ k- Bpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an) E* K2 n6 [! [% H) I
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
" h: a, m3 W2 P! n6 o7 N$ m1 O ndifference between the gold and silver medal, I see no reason for 5.38 s to9 U. w% `3 Z! c' E/ F$ p$ N
be treated as 7 s., q! Q3 a. e: _2 D# N
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Second, as previously pointed out, Ye is only 16 years old and her body is2 t. n; K z* N4 |
still developing. Bettering oneself by 5 seconds over two years may seem% t# ^( }1 n/ w) c) m' P
impossible for an adult swimmer, but it certainly happens among youngsters.
# K& d; M, D( `3 S8 p) |An interview with Australian gold medallist Ian Thorpe revealed that his 400: n6 c" z: v0 U! J, O
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
6 k( h5 a7 S) o- W# P4 u' AFor regular people, including Callaway, it may be hard to imagine what an
' L3 m8 j1 L* B* N5 \ gelite swimmer can achieve as he or she matures and undergoes scientific and
$ B' Z+ w5 K9 R5 v/ wpersistent training. But jumping to the conclusion that it is “anomalous”/ N0 P% M# I) [9 E J( ~ ~
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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7 L& u) Y8 P N2 D& V: aThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook4 m7 X- c( c0 ]1 o' R# N
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
7 _6 E7 o; [) N& a, Tthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so! {- R6 C3 I; U
he chose not to push himself too hard and to conserve his energy for later
0 N' m, \8 s; y; [' m4 ievents (whether this conforms to the Olympic spirit and the ‘use one’s
% } `; I+ M7 @3 K' M- X5 Z8 }best efforts to win a match’ requirement that the Badminton World8 d, }0 N) d9 P' ]& [; B
Federation recently invoked to disqualify four badminton pairs is another
; m, m6 j0 f5 c- k7 ^1 `, _topic worth discussing, though probably not in Nature). Ye, on the other
9 c: x: f% s$ n4 x* _' khand, was trailing behind after the first 300 metres and relied on freestyle$ X' x, H9 w$ k4 p$ x- m
, in which she has an edge, to win the race. Failing to mention this3 x% e, m1 z: t6 i7 k
strategic difference, as well as the fact that Lochte is 23.25 seconds
( G3 M% i. r5 t9 I" zfaster (4:05.18) than Ye overall, creates the illusion that a woman swam! ~- m. d' ^# L' E
faster than the best man in the same sport, which sounds impossible. Putting
& _9 d+ i4 z% N7 V8 Uaside the gender argument, I believe this is still a leading question that
/ e4 [3 [2 k( U% L2 E% @, l, nimplies to the reader that there is something fishy going on.1 G' d X) K4 a+ H8 }3 o. \
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Fourth is another example of cherry-picking. In the same event, there are
9 s. v8 m' E; ]+ C# ?& Gfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.931 W7 Z3 M$ i) E& C: c8 H% r! V) J% O
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) `. Y$ G2 _/ T% Q8 v+ ?), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns/ c& h: @: |" h2 i6 b% k; S
out, if we are just talking about the last 50 metres in a 400-metre IM,1 c) J* p: L; W7 [$ g' p( y( A4 s) a
Lochter is not the example I would have used if I were the author. What kind
1 K. n" K9 }& B9 G: w& iof scientific rigorousness is Callaway trying to demonstrate here? Is it! j& X6 l( s0 s! A+ A3 a
logical that if Lochter is the champion, we should assume that he leads in
2 T' @- j& Q- i+ L7 W5 ]every split? That would be a terrible way to teach the public how science
5 J0 ~4 A+ n2 c0 i0 ]2 Uworks.
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6 t+ O9 h( l/ P( m4 nFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( ^- a; C& H5 h; F+ M! [/ Q9 o' kimplies that a drug test cannot rule out the possibility of doping. Is this4 x7 I9 k d9 d* V# R3 `
kind of agnosticism what Nature really wants to teach its readers? By that* `0 ?2 i* }0 s7 c) m
standard, I estimate that at least half of the peer-reviewed scientific
$ Z- A' t7 ]) Q" i- kpapers in Nature should be retracted. How can one convince the editors and
7 h$ X- c# c; F5 I X' V1 creviewers that their proposed theory works for every possible case? One- N: p* z/ H% j
cannot. One chooses to apply the theory to typical examples and to1 i( f; u% ` x% E: p: c7 _
demonstrate that in (hopefully) all scenarios considered, the theory works
. r' L1 M7 o& R4 D* [to a degree, and that that should warrant publication until a counterexample
" y* _- u- ^* q T0 \- U" Uis found. I could imagine that Callaway has a sceptical mind, which is3 u4 o. `5 s9 D5 ?- r0 M u' `8 }
crucial to scientific thinking, but that would be put to better use if he
" f4 J$ a' l! z2 b0 B+ n h* Ewrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
$ R9 F3 k0 e8 j) I2 d1 [& kadvanced, non-detectable drug that the Chinese have come up with in the
& A" j3 e8 d' X, l" J/ q5 Tpast 4 years (they obviously did not have it in Beijing, otherwise why not$ Z3 m. x; g& B/ Y7 ~
use it and woo the audience at home?), based on data and rational derivation$ G* N. p+ }) a$ E* s. v8 r3 ~; s
. This article, however, can be interpreted as saying that all athletes are
5 f$ M# g4 X0 G- Udoping and the authorities are just not good enough to catch them. That may# m! [. l5 n% `0 q7 V/ |
be true, logically, but definitely will not make the case if there is ever a1 e. O3 a2 K |3 k6 [
hearing by the governing body for water sports, FINA, to determine if Ye
9 K5 D& N# X' Qhas doped. To ask whether it is possible to obtain a false negative in a
0 a' I* H. M8 K( h$ f u/ [drug test looks like a rigged question to me. Of course it is possible:+ o9 ?% z+ t- D! ~. z1 c
other than the athlete taking a drug that the test is not designed to detect/ j) t! Q0 x. m" a- m6 i7 `
, anyone who has taken quantum 101 will tell you that everything is
, \$ x U: e4 _, A1 l; [probabilistic in nature, and so there is a probability that the drug in an' s, Z# D5 X. o; i7 d- [9 s5 } m5 w3 _
athlete’s system could tunnel out right at the moment of the test. A slight/ {4 k" E& o: l, A/ l6 o% F
chance it may be, but should we disregard all test results because of it?4 ]8 T# F2 y: Z6 {5 P9 c& ~4 q
Let’s be practical and reasonable, and accept that the World Anti-Doping
# J+ i8 p% ]" q! a$ z2 \+ hagency (WADA) is competent at its job. Ye’s urine sample will be stored for# L8 F5 w& v2 a' i7 t J
eight years after the contest for future testing as technology advances.8 U) I* o6 ]. E1 P6 s
Innocent until proven guilty, shouldn’t it be?0 [. s/ X8 e5 i
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Sixth, and the last point I would like to make, is that the out-of-% J1 d5 _* J1 _: d' y4 @
competition drug test is already in effect, which Callaway failed to mention
2 x0 G) v9 B: M. As noted in the president of WADA’s press release, drug testing for
K5 T* \4 V0 `$ k1 a3 }Olympians began at least six months before the opening of the London
1 O/ C1 `$ q0 r8 c5 DOlympics. Furthermore, 107 athletes have been banned from this Olympics for; B2 N( |: |+ `4 \, d
doping. That may be the reason that “everyone will pass at the Olympic
0 Q8 Y: V: |1 f% Cgames. Hardly anyone fails in competition testing” — those who did dope: q8 z, Y( J& G6 m( a* c
have already been caught and sanctioned. Callaway is free to suggest that a
% @- [' k Z: t: }8 b2 ~player could have doped beforehand and fooled the test at the game, but this& ^" T& Q1 z/ L0 \ f$ B) l: _
possibility is certainly ruled out for Ye.0 z! } o& W; o. H
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Over all, even though Callaway did not falsify any data, he did (
% { Z( U1 O! ^' ~intentionally or not) cherry-pick data that, in my view, are far too6 c( [! Q, }9 S- }
suggestive to be fair and unbiased. If you want to cover a story of a' _" ^) Q: d8 ~
suspected doping from a scientific point of view, be impartial and provide
! E/ w6 q5 P& s! p, I. G/ @all the facts for the reader to judge. You are entitled to your. C3 [" Q2 O8 v' H; _) M0 Q0 N% i
interpretation of the facts, and the expression thereof in your piece,
, ^6 m& r. n+ }$ r' x9 kexplicitly or otherwise, but showing only evidence that favours your
( }; S; m: G8 c" V- n% oargument is hardly good science or journalism. Such an article in a journal
6 v4 E$ }# }+ Asuch as Nature is not an appropriate example of how scientific research or; ], o/ I1 l' L2 J4 ]7 O4 p/ u
reporting should be done. |
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