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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/ i: q; g6 l) i7 B a
如果是中国长大的,英语能到这种程度真是很不简单。# ~* B6 B- t% z1 t( R
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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8 t' j, [* `( }+ bFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
7 F% Q! ?5 d8 M% j/ v# I, regard as one of the most prestigious and influential physical-science& E5 }$ T0 b; p+ P0 z5 v
magazines — publish a thinly veiled biased article like this. Granted, this2 E. p& m1 N' ?6 h6 C# T
is not a peer-reviewed scientific article and did not go through the2 m% H6 e l u# d
scrutiny of picking referees. But to serve as a channel for the general
6 {" ^* G' x: Q9 O& Z! hpopulace to be in touch with and appreciate science, the authors and editors: h7 L: r W- c6 ?
should at least present the readers with facts within the proper context,* a* G- c" C) I6 _) M3 j
which they blatantly failed to do.. j B `$ v9 `9 M
# ^& d# ]! @! G! d: ?, PFirst, to identify Ye’s performance increase, Ewen Callaway compared her
2 ]4 X% ]% n4 ZOlympic 400-metre IM time with her performance at the World Championships in8 }$ h; D1 k0 S! R
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “( h* ~/ t" }# T+ Q8 I
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
$ g1 m0 d+ T( m) {personal best was 4:33.79 at the Asian Games in 2010. This leads to an* ?* Y/ H! e8 b! U( V8 O% u
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the: A3 _$ _3 Q+ s
difference between the gold and silver medal, I see no reason for 5.38 s to
, D; V2 ?2 [ k+ t* Tbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is. ?2 Z( J; s1 Z8 E$ B3 [$ c' i
still developing. Bettering oneself by 5 seconds over two years may seem
$ g1 I5 t* t" f$ |impossible for an adult swimmer, but it certainly happens among youngsters.
& {5 K# O$ m/ o6 L& oAn interview with Australian gold medallist Ian Thorpe revealed that his 400/ V) ~! u7 K1 h2 L+ j, e
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
V. ^1 z& ~: N5 wFor regular people, including Callaway, it may be hard to imagine what an/ r) @9 V. T: D2 T9 D$ N
elite swimmer can achieve as he or she matures and undergoes scientific and
: b$ p$ y3 a/ H3 C" upersistent training. But jumping to the conclusion that it is “anomalous”" E+ m3 W- R$ Q% u' s9 D
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.# ?7 O# j8 W+ L/ d
: o' M6 b0 V- _' X4 yThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook0 D' j" ` C4 R& s+ r m: ?
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 j0 R1 { k) t6 W+ @' G: }
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
) q2 }1 B j- e/ b- o, v8 lhe chose not to push himself too hard and to conserve his energy for later. q$ b7 [# W# Y
events (whether this conforms to the Olympic spirit and the ‘use one’s; g8 M0 p* y6 e% M- N: t
best efforts to win a match’ requirement that the Badminton World
! M X: z" b1 P+ I, y# LFederation recently invoked to disqualify four badminton pairs is another
9 N# a! B- F$ a' `, a; W# ktopic worth discussing, though probably not in Nature). Ye, on the other
l2 S: e5 \$ [+ E; Qhand, was trailing behind after the first 300 metres and relied on freestyle' Z ?, N* G$ b, K5 J7 R
, in which she has an edge, to win the race. Failing to mention this% h, Q, W4 A' u3 L, o) @" M
strategic difference, as well as the fact that Lochte is 23.25 seconds) ~7 N- q% K; Z9 t* ?1 s3 o4 g
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
, Z- m2 N: S5 K i0 F+ Tfaster than the best man in the same sport, which sounds impossible. Putting
/ @8 L6 a: F$ V9 w* p. l7 {. Paside the gender argument, I believe this is still a leading question that
2 A7 w* ~+ m: M+ j9 Uimplies to the reader that there is something fishy going on.- W2 v- H' u9 z
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Fourth is another example of cherry-picking. In the same event, there are7 J: y6 A/ y* B
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
5 G/ f, u7 n' G3 H' h/ S' ys) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s9 q3 g+ M% e- e( o- U& [
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
* N1 h4 H- t5 j; zout, if we are just talking about the last 50 metres in a 400-metre IM,! S7 u. ?$ F5 \1 ^; o
Lochter is not the example I would have used if I were the author. What kind
7 j6 c6 m) S6 t' |. x" ]of scientific rigorousness is Callaway trying to demonstrate here? Is it/ X- T! e( H- n4 Q1 c2 U! t; o
logical that if Lochter is the champion, we should assume that he leads in" H4 y& R5 ]* f6 V* ?7 I- j: Q9 e
every split? That would be a terrible way to teach the public how science2 ?+ P9 ^, x7 i
works.1 {- W' ~2 e7 ?7 ]1 J( R" i7 n9 b
H/ u. g/ B W! ?- d* s- AFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
" K$ e& t" O% u, ?: H; zimplies that a drug test cannot rule out the possibility of doping. Is this9 ^" Q9 j5 p+ E
kind of agnosticism what Nature really wants to teach its readers? By that( z) E# O2 K7 I* h# r% y
standard, I estimate that at least half of the peer-reviewed scientific/ U( B" l* y) S; b+ ^
papers in Nature should be retracted. How can one convince the editors and
* z! x$ ~# P9 \0 n+ treviewers that their proposed theory works for every possible case? One' Q( V8 u& ?% O6 Y9 W) t3 w2 q
cannot. One chooses to apply the theory to typical examples and to) P' d9 n' l) v C3 |
demonstrate that in (hopefully) all scenarios considered, the theory works: f H8 M1 K z) u; f; w9 H3 [
to a degree, and that that should warrant publication until a counterexample" \7 @4 a; S' i$ C* F2 ~2 _6 E
is found. I could imagine that Callaway has a sceptical mind, which is4 u6 j, a4 G, F
crucial to scientific thinking, but that would be put to better use if he
2 ~1 B, c5 s; _3 J3 V, ?% xwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: K C' E2 ^% m3 ?' o3 D k- g0 gadvanced, non-detectable drug that the Chinese have come up with in the- ]0 t+ ]& g# t( A6 ]2 a) f9 B
past 4 years (they obviously did not have it in Beijing, otherwise why not C/ n. J) p5 j8 }) Z
use it and woo the audience at home?), based on data and rational derivation/ w7 b# l T) R* x
. This article, however, can be interpreted as saying that all athletes are
! G* F* K# u1 ldoping and the authorities are just not good enough to catch them. That may
. D$ e2 s% a) p6 C1 o ~: Lbe true, logically, but definitely will not make the case if there is ever a
s: Y+ | N; [/ }. R+ xhearing by the governing body for water sports, FINA, to determine if Ye
! l, Q2 N4 K1 H h4 ]* h* j* zhas doped. To ask whether it is possible to obtain a false negative in a9 f1 P. S. a5 }% u; V% t
drug test looks like a rigged question to me. Of course it is possible:
( V$ W' z/ k2 hother than the athlete taking a drug that the test is not designed to detect
" M, ?8 q3 N& P, anyone who has taken quantum 101 will tell you that everything is1 ]5 _- v# c2 V! B
probabilistic in nature, and so there is a probability that the drug in an
4 @+ Q& r" J+ G ^* p( vathlete’s system could tunnel out right at the moment of the test. A slight
3 g' ?* O o- w- P) h2 Y0 qchance it may be, but should we disregard all test results because of it?
# a. N. v5 b! k! }8 f) yLet’s be practical and reasonable, and accept that the World Anti-Doping
6 y0 ^% K7 e8 ?; E. x: \agency (WADA) is competent at its job. Ye’s urine sample will be stored for, j7 R4 p- B5 u7 ~; r4 q' ^
eight years after the contest for future testing as technology advances.4 v3 `; [! n* O6 @6 j) ]+ d
Innocent until proven guilty, shouldn’t it be?
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& b8 Y+ f" s5 y8 L/ s2 dSixth, and the last point I would like to make, is that the out-of-4 m3 M8 n, Q/ Y1 G
competition drug test is already in effect, which Callaway failed to mention% o- O& t$ o. u: H1 ?" \
. As noted in the president of WADA’s press release, drug testing for( ?* D& o5 R( K1 D
Olympians began at least six months before the opening of the London
7 V7 y2 i+ W( ]) e# l" }Olympics. Furthermore, 107 athletes have been banned from this Olympics for# N' f P" b4 k* @" j' j; G
doping. That may be the reason that “everyone will pass at the Olympic
8 Z9 [' `7 d9 T0 c- f7 R% \games. Hardly anyone fails in competition testing” — those who did dope
9 W3 b% L9 e1 z7 _7 s5 ]0 lhave already been caught and sanctioned. Callaway is free to suggest that a3 S1 q8 `0 G" r* ~* y$ u" F/ l) Q' i
player could have doped beforehand and fooled the test at the game, but this5 ^' |- c* U0 o
possibility is certainly ruled out for Ye.* i6 {( N- F! J6 N& f; ~9 r9 {5 p
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Over all, even though Callaway did not falsify any data, he did (; S# X2 k1 T1 [" D
intentionally or not) cherry-pick data that, in my view, are far too
: G* F* [+ H) C8 ]9 S. O0 h/ tsuggestive to be fair and unbiased. If you want to cover a story of a
: ~# |5 R9 L. b- }9 `4 s, }suspected doping from a scientific point of view, be impartial and provide
r) }( j9 ^3 `4 B, U. Kall the facts for the reader to judge. You are entitled to your
/ L1 L2 m! I3 R1 }8 L; b8 Y" Binterpretation of the facts, and the expression thereof in your piece,
- p5 M, v8 y- j l. `4 L$ ?explicitly or otherwise, but showing only evidence that favours your8 e! b0 G3 ~7 \# ? c5 B0 |! A
argument is hardly good science or journalism. Such an article in a journal
6 S% l! m, a9 I- G4 fsuch as Nature is not an appropriate example of how scientific research or
; E9 H* _% J' f9 ?0 K6 P& ~reporting should be done. |
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