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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 ?/ X: F. P0 G/ {7 }
如果是中国长大的,英语能到这种程度真是很不简单。+ Y& u0 k* s8 T4 ^
# P3 C5 I+ b4 Thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html2 P( N& E- v8 z: N5 Z% ^" \5 @2 s
2 g7 A3 ~8 V4 ~6 DFROM LAI JIANG, Department of Chemistry, University of Pennsylvania. K5 t7 L' n1 K$ R& d
9 c. L5 [. i4 Q* e+ W3 ^It is a shame to see Nature — which nearly all scientists, including myself! e' T* G! w. |; |7 K b) f
, regard as one of the most prestigious and influential physical-science# I% P7 `" i6 p4 c4 H' S
magazines — publish a thinly veiled biased article like this. Granted, this
2 |" a P4 O T' t) T. uis not a peer-reviewed scientific article and did not go through the7 a. }, h- m2 |2 e* E2 h
scrutiny of picking referees. But to serve as a channel for the general% l0 e8 m: t) K
populace to be in touch with and appreciate science, the authors and editors
1 F8 y$ P9 q0 Oshould at least present the readers with facts within the proper context,
- ~' Z2 Q4 j( p l. Ewhich they blatantly failed to do.
- j7 x: b7 x& e/ e
* E5 [ E4 O, H) I: z: NFirst, to identify Ye’s performance increase, Ewen Callaway compared her) F4 ]9 [& g8 L/ h
Olympic 400-metre IM time with her performance at the World Championships in: T) J( H z+ x6 x+ q9 n! Q
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
( K6 e# W# H: u1 _, X) a& lanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- B5 e: l1 _# s3 A! L6 epersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
- O* M2 Z1 O& zimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
8 ^5 R# I E. [6 b4 M1 e% x2 tdifference between the gold and silver medal, I see no reason for 5.38 s to# M' A; ?: d5 s B
be treated as 7 s.
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# k6 I/ |1 o! Q2 [3 j j& `Second, as previously pointed out, Ye is only 16 years old and her body is" m3 a3 x5 E, O0 L6 B5 b
still developing. Bettering oneself by 5 seconds over two years may seem, O( ?" X9 c# [- W+ S
impossible for an adult swimmer, but it certainly happens among youngsters.
1 u4 @+ |1 ]3 ~$ zAn interview with Australian gold medallist Ian Thorpe revealed that his 400, G' I) c. b& p* ?! i& \% K- d
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
% Z1 Y7 m% w% j. zFor regular people, including Callaway, it may be hard to imagine what an: _4 m, O0 r7 ~& R* p8 Y; e3 {" D
elite swimmer can achieve as he or she matures and undergoes scientific and
" A( K9 d& q7 K( Z Spersistent training. But jumping to the conclusion that it is “anomalous”" f1 F F& V# \6 ?7 l( \/ d
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
& b$ c4 N3 Y Q& f, O% H# ^
" Z% }; e9 w' K1 ?, Q7 rThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
. K# w4 B* h+ E/ I; Z/ ^example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
+ \ Z, Y& P# Y5 d8 X3 ?* P7 qthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so0 X# K2 t/ k$ X; A
he chose not to push himself too hard and to conserve his energy for later9 e' z% q* I* Z$ ]+ r
events (whether this conforms to the Olympic spirit and the ‘use one’s" } ^, e4 [1 F& `# Q4 k* a
best efforts to win a match’ requirement that the Badminton World
2 W* o) s* q* }2 i' PFederation recently invoked to disqualify four badminton pairs is another. a! I/ X2 j' w5 @
topic worth discussing, though probably not in Nature). Ye, on the other" Q* C" `- |+ n. ^1 I0 m* {
hand, was trailing behind after the first 300 metres and relied on freestyle
a4 ]. F% }' ^, in which she has an edge, to win the race. Failing to mention this
' d! A( t7 |1 c1 D5 D$ x) ?strategic difference, as well as the fact that Lochte is 23.25 seconds4 F% w. O* C* r4 ]
faster (4:05.18) than Ye overall, creates the illusion that a woman swam" K# I( ?1 _3 e5 k7 r4 L
faster than the best man in the same sport, which sounds impossible. Putting
( x! t" R, T$ X- v6 U4 H+ t* `- Xaside the gender argument, I believe this is still a leading question that
6 t/ d1 H3 N% w2 ^implies to the reader that there is something fishy going on.) V u' p5 y) [
3 {2 Z3 Y" s' I' }, l. W- U6 u
Fourth is another example of cherry-picking. In the same event, there are
M+ M; w8 }3 Q( `four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
0 {' C% T$ F* l; S5 C% l: Q* }! @s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
5 q4 Y6 h3 R! i0 E& k), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
* B6 G4 h' G9 G& I3 q: R' `out, if we are just talking about the last 50 metres in a 400-metre IM,, ^) ?- C& J, j# T% T. @' H% G
Lochter is not the example I would have used if I were the author. What kind- c" N0 A, F: l. F
of scientific rigorousness is Callaway trying to demonstrate here? Is it
b. @: v5 g) w- Tlogical that if Lochter is the champion, we should assume that he leads in; W5 ?: C; y! A- U C R& s6 m
every split? That would be a terrible way to teach the public how science
% G3 y9 D( C/ zworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and7 B0 I% @6 W v2 M+ e+ r
implies that a drug test cannot rule out the possibility of doping. Is this8 w6 `* o( U& q- Q) R; M8 \
kind of agnosticism what Nature really wants to teach its readers? By that' R' {; m% q7 I
standard, I estimate that at least half of the peer-reviewed scientific
! L0 q& R& o- K& E, A1 Xpapers in Nature should be retracted. How can one convince the editors and! g% H7 q7 Z' d0 M2 h
reviewers that their proposed theory works for every possible case? One
+ g# o8 T1 @' s5 f) G3 G- B4 Ccannot. One chooses to apply the theory to typical examples and to
! H1 V2 d9 @9 k( q' ]demonstrate that in (hopefully) all scenarios considered, the theory works. t1 r& c3 y5 H4 U/ |
to a degree, and that that should warrant publication until a counterexample
i( P: r3 ~ `. A; eis found. I could imagine that Callaway has a sceptical mind, which is6 T2 [% A& h7 T
crucial to scientific thinking, but that would be put to better use if he
* K8 w @& p9 [/ dwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
" P4 T) a; Y( [advanced, non-detectable drug that the Chinese have come up with in the$ }% u, Y, c" w# k9 c* O0 o2 x9 q
past 4 years (they obviously did not have it in Beijing, otherwise why not
! o& L5 ]- g& y! `9 u5 _use it and woo the audience at home?), based on data and rational derivation# k* D7 [8 p3 N
. This article, however, can be interpreted as saying that all athletes are0 a2 ]& J' _! |- o& A* C
doping and the authorities are just not good enough to catch them. That may8 O& O% |4 b- O2 \1 j
be true, logically, but definitely will not make the case if there is ever a4 x5 ^. L9 W6 Z" R- W2 B
hearing by the governing body for water sports, FINA, to determine if Ye) D2 T' y4 t6 _: q
has doped. To ask whether it is possible to obtain a false negative in a
Y4 @' z# R1 V, hdrug test looks like a rigged question to me. Of course it is possible:
, h, p' c: e9 j8 `other than the athlete taking a drug that the test is not designed to detect
8 D9 Z- u- b0 E% R5 S. j# H, anyone who has taken quantum 101 will tell you that everything is# c4 S+ i& X, c7 n" J" z+ G
probabilistic in nature, and so there is a probability that the drug in an. b4 e: [/ b0 x9 T5 B3 H5 v
athlete’s system could tunnel out right at the moment of the test. A slight) u3 X2 T0 h" \3 O* i
chance it may be, but should we disregard all test results because of it?
, K# H1 U4 o1 p2 Q6 }* pLet’s be practical and reasonable, and accept that the World Anti-Doping
! e5 G5 A9 s0 l1 w( Vagency (WADA) is competent at its job. Ye’s urine sample will be stored for9 d4 w! g. p6 t3 Q( f
eight years after the contest for future testing as technology advances.5 r, S0 o% r4 B/ } i* E' \
Innocent until proven guilty, shouldn’t it be?: u- l& Q0 T1 {, A" i g
$ h& l6 m8 I# w# W6 L% i( JSixth, and the last point I would like to make, is that the out-of-' l5 t/ T% m @& D8 b# m6 v0 `, g2 ^
competition drug test is already in effect, which Callaway failed to mention
* A( T5 Z- t& W) S7 H+ v) Z- h; ~. As noted in the president of WADA’s press release, drug testing for; d& f/ h* w+ ^/ p" K, b$ r3 U) }( K# P
Olympians began at least six months before the opening of the London+ Y5 C+ Z8 Q! Q! [) U
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
5 d/ b7 h5 {: t; Bdoping. That may be the reason that “everyone will pass at the Olympic; s/ L3 z8 t" o% a4 i! i" t: W0 ?* W
games. Hardly anyone fails in competition testing” — those who did dope7 P: Y! q9 j6 h, X
have already been caught and sanctioned. Callaway is free to suggest that a
9 @0 p% K1 B) |9 M* x) p+ _* Rplayer could have doped beforehand and fooled the test at the game, but this
3 P( Y( c) B/ h! n1 gpossibility is certainly ruled out for Ye.% U. K, i% Y( b
+ U$ R ]9 g* W% J
Over all, even though Callaway did not falsify any data, he did (
y5 ], d- p0 M& ]0 Y1 Xintentionally or not) cherry-pick data that, in my view, are far too
* p) P7 R7 f$ a$ T1 c/ F2 U2 L1 bsuggestive to be fair and unbiased. If you want to cover a story of a
! V; I% M! x- n: _+ E$ i& Ususpected doping from a scientific point of view, be impartial and provide
0 ~4 Q/ E. ^. f7 A1 M Kall the facts for the reader to judge. You are entitled to your
2 _/ J! A' N& I3 h& m* l4 winterpretation of the facts, and the expression thereof in your piece,
, }+ |) Y" X. Dexplicitly or otherwise, but showing only evidence that favours your
' n9 o8 X# P6 }" z O- Aargument is hardly good science or journalism. Such an article in a journal
+ t! x* A) I. X. _3 tsuch as Nature is not an appropriate example of how scientific research or- y% k' d9 O+ _% q- ~; s: K: \+ ^
reporting should be done. |
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