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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: y1 {& E/ L8 B( N. }9 s
如果是中国长大的,英语能到这种程度真是很不简单。* N1 h( U; o% a- C
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html4 b" Y. c% r7 M, l! I7 h8 N- y9 k' W
# E% j5 E: X/ k2 R P8 `FROM LAI JIANG, Department of Chemistry, University of Pennsylvania! t. n5 G6 J( a. _4 D' m9 O
: N9 x& l- |( @2 D qIt is a shame to see Nature — which nearly all scientists, including myself( Y# l1 _/ l4 x8 S! s
, regard as one of the most prestigious and influential physical-science
# t) @3 O# r7 k+ _; F: a1 B+ Y0 pmagazines — publish a thinly veiled biased article like this. Granted, this/ T, E$ ] ]1 o
is not a peer-reviewed scientific article and did not go through the0 P, Y3 }. n! V g! h9 s
scrutiny of picking referees. But to serve as a channel for the general( c4 b/ ~4 j9 ~! E& X( e
populace to be in touch with and appreciate science, the authors and editors9 Q+ _% H! b0 @# ^* U8 E
should at least present the readers with facts within the proper context,( b& t- x$ g l6 R& `) ^/ P
which they blatantly failed to do.. W4 S2 U1 i$ }. Q- d8 o1 K
& @! m" K9 L+ z2 {$ Z' VFirst, to identify Ye’s performance increase, Ewen Callaway compared her
3 g5 w5 f+ I2 v: H2 r4 Q3 XOlympic 400-metre IM time with her performance at the World Championships in& ?6 z$ V, c1 w3 Q6 E
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “$ B5 u& h" [* S+ y2 _9 {6 u
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous( n* a* P' |, X4 s8 b( @, C0 I7 J
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
2 \1 X5 K$ t7 b" k! yimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
$ P% @4 Z4 W8 o" y+ R) x6 g4 idifference between the gold and silver medal, I see no reason for 5.38 s to
9 w# Q7 r5 d. G; g. h- ~be treated as 7 s.
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3 M- B2 ~6 p# u$ ]Second, as previously pointed out, Ye is only 16 years old and her body is0 B' r( G( Y2 S/ S
still developing. Bettering oneself by 5 seconds over two years may seem
- l+ P* r( p) T7 y8 fimpossible for an adult swimmer, but it certainly happens among youngsters.
9 q3 E4 g; w% C" c6 j% G9 WAn interview with Australian gold medallist Ian Thorpe revealed that his 400
8 Z6 F; A5 J; r5 S5 J5 g9 Z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
4 G* L1 Q- S; [- V, t% uFor regular people, including Callaway, it may be hard to imagine what an; k( ~7 ]4 x% }6 m8 r, a0 q+ y1 t
elite swimmer can achieve as he or she matures and undergoes scientific and
8 f' S: c4 Z/ Zpersistent training. But jumping to the conclusion that it is “anomalous”' N5 \$ \& F' O
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.4 f" E0 r! f1 V c1 n$ w
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook1 B! o5 C, R& c& F5 |( `+ o
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in' \( h# J: N: E* {* x3 a1 |
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so% t1 P2 h4 u; c8 c/ h
he chose not to push himself too hard and to conserve his energy for later- A, T3 o. w( K+ f/ e+ B2 R
events (whether this conforms to the Olympic spirit and the ‘use one’s
: {4 W9 H+ v/ Y. _+ z' B2 ~2 Y- R# c' ebest efforts to win a match’ requirement that the Badminton World
) t1 v8 Y- x5 i1 M/ l- sFederation recently invoked to disqualify four badminton pairs is another0 Q7 v u% i7 m4 _3 M
topic worth discussing, though probably not in Nature). Ye, on the other
- ?% ~; z$ s0 w" n: k3 Bhand, was trailing behind after the first 300 metres and relied on freestyle
" N' S1 d9 ]- N, in which she has an edge, to win the race. Failing to mention this
: s/ R7 M, p1 S u) xstrategic difference, as well as the fact that Lochte is 23.25 seconds6 D7 o" L/ t; \
faster (4:05.18) than Ye overall, creates the illusion that a woman swam, h' y A- f& H
faster than the best man in the same sport, which sounds impossible. Putting
, D7 S2 s' J7 Z: r' g3 }0 M$ x- Xaside the gender argument, I believe this is still a leading question that4 p4 B+ |( \, n U' A8 I+ |1 \( n
implies to the reader that there is something fishy going on.! i5 F2 q9 D7 G. n; A
, j& _- U& P2 Z/ W/ N" P/ @. M
Fourth is another example of cherry-picking. In the same event, there are; W, v; Y8 M6 t' `/ r
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
/ N- h7 A5 J- b8 @$ d2 W5 ^( Os) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s* |; P/ O; e; K6 P' d0 X2 s
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
$ T6 ~, @- G( e: J) C0 Hout, if we are just talking about the last 50 metres in a 400-metre IM,' U% x" j, l8 w8 @. M
Lochter is not the example I would have used if I were the author. What kind/ x$ f! A" [" r5 }% K
of scientific rigorousness is Callaway trying to demonstrate here? Is it; d- M2 ?6 Y; e$ I
logical that if Lochter is the champion, we should assume that he leads in" U5 b# d% @& x* x6 K7 p' `
every split? That would be a terrible way to teach the public how science: S4 d2 [/ Q" h: h) r2 k) x1 F
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
: u6 i7 x' O) ? l* i4 Jimplies that a drug test cannot rule out the possibility of doping. Is this
) h {1 G9 E& A, i1 Tkind of agnosticism what Nature really wants to teach its readers? By that
, f# |/ m2 s3 m/ |" sstandard, I estimate that at least half of the peer-reviewed scientific3 m3 e% @- U; E
papers in Nature should be retracted. How can one convince the editors and
; b* p' i7 b& \reviewers that their proposed theory works for every possible case? One; G$ }1 U z, q" p$ w6 a, m
cannot. One chooses to apply the theory to typical examples and to
6 P# c& L. E3 p1 W% z$ Idemonstrate that in (hopefully) all scenarios considered, the theory works
! ?9 p3 x! V7 W4 G; qto a degree, and that that should warrant publication until a counterexample
+ ]1 z/ g$ f0 L5 G3 Vis found. I could imagine that Callaway has a sceptical mind, which is
7 D; S8 |+ x0 H/ t! @/ t- Mcrucial to scientific thinking, but that would be put to better use if he
+ G: ]* _; j! V! ?* m* t6 P( ]7 \wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
) _; M% X) Y! {% c& W6 m8 kadvanced, non-detectable drug that the Chinese have come up with in the- L: j) `9 G" _4 e
past 4 years (they obviously did not have it in Beijing, otherwise why not
( _' u: T( F2 e9 _6 s( guse it and woo the audience at home?), based on data and rational derivation7 M' ~3 d. h& D, @
. This article, however, can be interpreted as saying that all athletes are0 ?1 A; T1 a2 I7 U1 n
doping and the authorities are just not good enough to catch them. That may. C: g* m4 Q+ l0 O0 p* U7 |
be true, logically, but definitely will not make the case if there is ever a
% n* E4 h6 `6 b& Jhearing by the governing body for water sports, FINA, to determine if Ye1 y& e! ^* n/ y5 F3 N
has doped. To ask whether it is possible to obtain a false negative in a
& s# b/ c4 f" {7 q/ @drug test looks like a rigged question to me. Of course it is possible:
" u/ p( { q: [: i( ~- T# bother than the athlete taking a drug that the test is not designed to detect
& h. [! S o' b+ g7 E, anyone who has taken quantum 101 will tell you that everything is* ?) Q: f0 u+ n) r- ^9 x+ p | G
probabilistic in nature, and so there is a probability that the drug in an2 K9 y. D8 f! _) f) u5 ?
athlete’s system could tunnel out right at the moment of the test. A slight8 Q7 H# A2 R* w' e4 ` i* W0 p7 j
chance it may be, but should we disregard all test results because of it?: X: L5 Q0 z3 v6 C; c6 Y; |1 }
Let’s be practical and reasonable, and accept that the World Anti-Doping
& l$ q5 T' Z' e; Cagency (WADA) is competent at its job. Ye’s urine sample will be stored for
) \" S+ I0 R8 l# O5 w) aeight years after the contest for future testing as technology advances.
, g2 y m* B. h3 f" eInnocent until proven guilty, shouldn’t it be?9 [( g0 ?& E3 B- q7 b9 C
, l5 }- D; T; x4 aSixth, and the last point I would like to make, is that the out-of-
! d q+ z- n) w2 j( V- Vcompetition drug test is already in effect, which Callaway failed to mention( V$ x5 M6 i& t' L
. As noted in the president of WADA’s press release, drug testing for
7 h8 g# N+ z. b: d' }Olympians began at least six months before the opening of the London9 D9 V$ [; z* e& W* ~8 D( g
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
l5 s- M' u9 N/ [* X$ ydoping. That may be the reason that “everyone will pass at the Olympic
" S( k6 C' H( h* ]3 Zgames. Hardly anyone fails in competition testing” — those who did dope; Z% q$ ]" @5 u
have already been caught and sanctioned. Callaway is free to suggest that a
& }' g; c" C+ m9 o. A/ j- mplayer could have doped beforehand and fooled the test at the game, but this
* K$ |6 _) Y Fpossibility is certainly ruled out for Ye.
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" l+ E6 A2 B- q# c8 \+ R( ]" ^+ VOver all, even though Callaway did not falsify any data, he did (. Y9 K2 @7 k# E5 L4 @3 E, Y% g
intentionally or not) cherry-pick data that, in my view, are far too
) V K, c" u: w/ E) z2 y( t- Bsuggestive to be fair and unbiased. If you want to cover a story of a
: Y8 o- s7 s/ l* R* Z3 tsuspected doping from a scientific point of view, be impartial and provide
6 ?7 [5 l, w+ Y" j! eall the facts for the reader to judge. You are entitled to your4 f" j# R8 ~" D& z$ V6 a
interpretation of the facts, and the expression thereof in your piece,
# r4 q4 G& z) W. {2 k* G0 w. E# _explicitly or otherwise, but showing only evidence that favours your8 y8 y( d$ j, G& o; C* G) t
argument is hardly good science or journalism. Such an article in a journal/ `1 q0 D/ r/ H" ?! D
such as Nature is not an appropriate example of how scientific research or+ B" _. U, e2 q) m( I: h1 H
reporting should be done. |
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