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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
. ?5 i9 `: w5 t6 G" K如果是中国长大的,英语能到这种程度真是很不简单。9 z; {1 w/ S4 U3 _* \/ v
( D# i4 G C) \8 m* t, k9 ]* xhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html. {$ U9 V4 j& z- v
: `$ ~% e# U, m* P v1 x9 vFROM 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 L+ c( `' p# t* q& C# B' j
, regard as one of the most prestigious and influential physical-science- W, k% y8 v1 F: N5 s
magazines — publish a thinly veiled biased article like this. Granted, this
* p# I1 q. g/ i: R, r; p& Pis not a peer-reviewed scientific article and did not go through the
2 V9 }! S/ L/ jscrutiny of picking referees. But to serve as a channel for the general
) b2 f- j. |: P! |! e3 Zpopulace to be in touch with and appreciate science, the authors and editors
; j2 B# [% m# d; l7 G% nshould at least present the readers with facts within the proper context,
# ^- W4 `9 r) a4 \$ H% \# Awhich they blatantly failed to do.- \# p- u* k" a% q
. ~" O- |0 b7 ]. z0 E) m* MFirst, to identify Ye’s performance increase, Ewen Callaway compared her
! p( a( J3 F. B J5 p l$ wOlympic 400-metre IM time with her performance at the World Championships in# }- p" D) f5 e+ z7 U
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “. L w. q- M: ]% ]# \: @
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
$ t% T) I9 R- S+ Ipersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
$ }. N5 P5 P: P3 |5 u3 {3 `improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the+ D- Z7 S. r* P( D/ H7 I( T
difference between the gold and silver medal, I see no reason for 5.38 s to r* x0 ~: g2 c7 g% E
be treated as 7 s.1 \, h O* \/ T& T) ]2 V2 s
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Second, as previously pointed out, Ye is only 16 years old and her body is1 |- K% T- b! o. x) z. o c
still developing. Bettering oneself by 5 seconds over two years may seem! z w+ \- v. C0 S" d: E
impossible for an adult swimmer, but it certainly happens among youngsters.5 o( |2 k0 ]' G1 ~$ `1 Y
An interview with Australian gold medallist Ian Thorpe revealed that his 400
/ i& Z1 Z8 t2 V8 p8 L& U* _& z, z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.$ T! N! u$ n5 l o; m9 q
For regular people, including Callaway, it may be hard to imagine what an
+ x" `* p: B5 N7 M+ H2 Eelite swimmer can achieve as he or she matures and undergoes scientific and# _- O& R* b9 m5 b- ^3 |" h4 I
persistent training. But jumping to the conclusion that it is “anomalous”2 ]5 t0 Y1 [ H) p3 q
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook; B3 l6 h- N$ j7 Y+ g$ A" @
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in" v3 C! ~. k8 v _- E- y* X
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
: ~, \/ e7 V1 lhe chose not to push himself too hard and to conserve his energy for later+ a: ~# k+ a6 H7 ~
events (whether this conforms to the Olympic spirit and the ‘use one’s
3 b9 B8 z: Q- _4 ^! U( q" ubest efforts to win a match’ requirement that the Badminton World. |9 T! ?$ p$ p
Federation recently invoked to disqualify four badminton pairs is another; |$ ~% }9 m4 ~9 w: }! k7 O( R$ j
topic worth discussing, though probably not in Nature). Ye, on the other
5 ^ D9 M. Y' z5 @/ u) m6 E( X% e2 bhand, was trailing behind after the first 300 metres and relied on freestyle
& F6 O' K' b4 [, in which she has an edge, to win the race. Failing to mention this
* @# _* M/ @& o: O M! m0 ]1 F& Fstrategic difference, as well as the fact that Lochte is 23.25 seconds
. c4 K. _5 _1 g. d+ a3 S5 n9 ~6 S/ H/ Ofaster (4:05.18) than Ye overall, creates the illusion that a woman swam) D% T1 W2 w7 f+ e1 ~8 n* K
faster than the best man in the same sport, which sounds impossible. Putting5 a0 F! q- z( [' y3 M+ `( m" ?
aside the gender argument, I believe this is still a leading question that8 _: U3 q z7 `/ O4 P6 A
implies to the reader that there is something fishy going on.: Z$ a1 w; j1 d7 B4 J& E7 u8 S( n
h+ \1 w$ [ A. b( `% P
Fourth is another example of cherry-picking. In the same event, there are( H0 M2 b5 |# }
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
U7 w. ], v7 H" t1 D3 `s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
. |2 @/ ?* ]( |( @$ l; O Z, R), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
) G; B; k# q/ K0 F& ^1 |7 J7 Nout, if we are just talking about the last 50 metres in a 400-metre IM,! D* q& ^( w0 \4 V: W
Lochter is not the example I would have used if I were the author. What kind
7 S; i; S l6 Z1 T2 F r2 \of scientific rigorousness is Callaway trying to demonstrate here? Is it
, j; i5 o) C& I3 k k9 |0 S6 |( alogical that if Lochter is the champion, we should assume that he leads in
6 R0 u- V; v0 L+ k/ Yevery split? That would be a terrible way to teach the public how science
0 f: @! X( C% [* O( E. F- i, T, Gworks.5 L: k! a- G+ ]& |" T. @& O) v- C
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
9 n, I$ q" ?$ e2 A P" o2 rimplies that a drug test cannot rule out the possibility of doping. Is this/ w" C3 x5 L0 _2 k1 y. k
kind of agnosticism what Nature really wants to teach its readers? By that
4 i u+ N8 T+ e9 E( ]) D) H- J8 Lstandard, I estimate that at least half of the peer-reviewed scientific' h7 P6 J' O7 o' r5 G
papers in Nature should be retracted. How can one convince the editors and! z" V% H- w( }3 ^
reviewers that their proposed theory works for every possible case? One
$ g8 }, X4 P; e+ Y6 A! N/ ]9 `cannot. One chooses to apply the theory to typical examples and to
- L3 M- @/ \$ X: Jdemonstrate that in (hopefully) all scenarios considered, the theory works
( W* [+ l- D- b! ]5 ito a degree, and that that should warrant publication until a counterexample% I# f, r) Q- C
is found. I could imagine that Callaway has a sceptical mind, which is& Q' L4 ~& j) C. o( E8 ]2 ?
crucial to scientific thinking, but that would be put to better use if he
! r3 H" r# {9 P' m; b" P- Rwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 ]( o; I, j1 H0 h! z
advanced, non-detectable drug that the Chinese have come up with in the
- M2 h' V: M$ k' Z3 o5 ~& g, ^past 4 years (they obviously did not have it in Beijing, otherwise why not* a& R& v |# e6 N6 }
use it and woo the audience at home?), based on data and rational derivation
: k" i) A# T' X% P% D. This article, however, can be interpreted as saying that all athletes are
: B) F8 `$ O9 [; H" | Hdoping and the authorities are just not good enough to catch them. That may. R' [/ Y; U6 G+ |9 s3 s
be true, logically, but definitely will not make the case if there is ever a
1 ^( u* B$ C; a7 l& chearing by the governing body for water sports, FINA, to determine if Ye2 Z/ G' H3 @! m7 g
has doped. To ask whether it is possible to obtain a false negative in a
6 j6 R1 B/ W, e$ Idrug test looks like a rigged question to me. Of course it is possible:
( |5 {0 K$ ]( X1 U; Xother than the athlete taking a drug that the test is not designed to detect
8 M2 I/ Q1 f; U& Q1 `" J, anyone who has taken quantum 101 will tell you that everything is
. `/ h1 Z+ {' m* l1 X9 Gprobabilistic in nature, and so there is a probability that the drug in an3 s2 m* }& P: P6 S( V, [4 S! ]
athlete’s system could tunnel out right at the moment of the test. A slight
6 ]$ ]# C- y3 D3 D) Schance it may be, but should we disregard all test results because of it?
" H3 i7 e: b: d, I/ `1 b+ fLet’s be practical and reasonable, and accept that the World Anti-Doping7 y% u/ A: A3 U* O/ K" |
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
& v' h7 |9 U5 A8 I6 Eeight years after the contest for future testing as technology advances.$ t8 }4 {8 X, \& |* J X
Innocent until proven guilty, shouldn’t it be?
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1 V S% ?3 u6 W6 h3 h/ @Sixth, and the last point I would like to make, is that the out-of-* w# u- Z+ j: E8 o( C
competition drug test is already in effect, which Callaway failed to mention* T1 P- k+ a- S0 f& l- n2 s3 b
. As noted in the president of WADA’s press release, drug testing for) D9 |5 j2 @8 R* A Q, Z0 P
Olympians began at least six months before the opening of the London2 u' s. f$ ?# Y% S* w6 x3 o
Olympics. Furthermore, 107 athletes have been banned from this Olympics for: E& _* j4 m$ k4 f8 u$ b- |+ K, O& H j
doping. That may be the reason that “everyone will pass at the Olympic0 E; D4 B, N: C3 B* K9 g6 l4 B
games. Hardly anyone fails in competition testing” — those who did dope
2 j D. N* t/ }3 z. y8 Mhave already been caught and sanctioned. Callaway is free to suggest that a; Q1 g6 l4 Q9 N" i+ i
player could have doped beforehand and fooled the test at the game, but this! ?4 x6 {( b2 D1 g! q; _$ W% f. O6 H9 _
possibility is certainly ruled out for Ye.4 ?# h- O* k9 z4 B0 B( `
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Over all, even though Callaway did not falsify any data, he did (7 T" X! m, Q" i5 O$ {! h" y1 l
intentionally or not) cherry-pick data that, in my view, are far too
9 D( |2 ?* k, hsuggestive to be fair and unbiased. If you want to cover a story of a2 y3 s$ ^4 K- a$ a; q; H
suspected doping from a scientific point of view, be impartial and provide
* z4 ]5 h( m- ?all the facts for the reader to judge. You are entitled to your
5 @) v4 n0 W5 @1 r# k' Einterpretation of the facts, and the expression thereof in your piece,
9 i- }) {& F L" S' [4 wexplicitly or otherwise, but showing only evidence that favours your I) T8 f+ Y1 r- e8 X+ Q/ r
argument is hardly good science or journalism. Such an article in a journal
, _0 X. a7 l6 ?. Z, ^1 F/ Fsuch as Nature is not an appropriate example of how scientific research or
. @1 |* k# ~, ereporting should be done. |
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