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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" _3 Y: P; P1 |8 a; d" N, O2 m
如果是中国长大的,英语能到这种程度真是很不简单。
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html# s+ D; J2 K) U4 w9 u
1 Y0 N% Z9 C$ [ @FROM LAI JIANG, Department of Chemistry, University of Pennsylvania" ^# k) b1 D" c5 u+ S% d0 n- m
- y, e& O4 i$ a3 u B8 `It is a shame to see Nature — which nearly all scientists, including myself0 N7 D. C# Z- K4 e6 Y, d! G
, regard as one of the most prestigious and influential physical-science# i; t" {# Z; H- d5 x4 [
magazines — publish a thinly veiled biased article like this. Granted, this0 v9 W1 s. M, D6 {& u% }( e Y
is not a peer-reviewed scientific article and did not go through the' i8 D# ~' f0 ?7 \* V2 T
scrutiny of picking referees. But to serve as a channel for the general
' Z. [3 j- N0 {, ^populace to be in touch with and appreciate science, the authors and editors. R2 L2 ?% k- ` X+ q
should at least present the readers with facts within the proper context,+ r) {& o- X9 u. ?' w/ b4 N
which they blatantly failed to do.( i) L/ ~5 _" N5 |0 n6 b! x" Q, A
! ]; A" x" N, MFirst, to identify Ye’s performance increase, Ewen Callaway compared her& M2 D6 g, }! @ l6 a
Olympic 400-metre IM time with her performance at the World Championships in
6 M e6 {1 U: F& ^" }& D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “2 g# B5 R% ]6 ]/ ^# n6 V
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous& o3 A2 [2 C1 E$ P) @
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
* F8 S* d+ x$ j/ ^$ ^) ]% y/ Zimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
6 J& X& n, `+ I5 ` E- ] Rdifference between the gold and silver medal, I see no reason for 5.38 s to& H) N- E! y+ \/ F0 [$ S- p
be treated as 7 s.& U9 s& }( W. q. B9 a
5 X' `. S3 N" E, qSecond, as previously pointed out, Ye is only 16 years old and her body is- B0 |4 ?; i V, D0 e" @& e# ^
still developing. Bettering oneself by 5 seconds over two years may seem
) o2 s* j% K$ I z4 @4 t& cimpossible for an adult swimmer, but it certainly happens among youngsters.9 {% o: I- k# ]" s8 r
An interview with Australian gold medallist Ian Thorpe revealed that his 400
1 q0 S: p, Y* U! `) ?4 K8 r7 r-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
3 o" t- t. G$ f- _9 [For regular people, including Callaway, it may be hard to imagine what an
5 e' m- Y5 l- B3 Z+ c3 Jelite swimmer can achieve as he or she matures and undergoes scientific and
8 |& s1 N0 g7 i) c$ f# m, G. rpersistent training. But jumping to the conclusion that it is “anomalous”0 N/ t% G' B+ O% _ ]$ m7 v0 l
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% h% y% T& e Q C# a p1 ` Y$ i5 o
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
+ T! E+ w- _0 ^0 zthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
+ v7 ~# g$ ?6 Y/ R+ ~7 ^he chose not to push himself too hard and to conserve his energy for later7 k% |5 a& Y1 @3 P3 x, F( e2 p
events (whether this conforms to the Olympic spirit and the ‘use one’s
* T* Y* @# |" ^best efforts to win a match’ requirement that the Badminton World: z% b- e6 i5 l' j% t( n
Federation recently invoked to disqualify four badminton pairs is another
B+ m' L& _" _9 I3 Htopic worth discussing, though probably not in Nature). Ye, on the other6 ^0 D; t& F( g
hand, was trailing behind after the first 300 metres and relied on freestyle
. A: }" q! d( {; V$ G# K1 Q, in which she has an edge, to win the race. Failing to mention this) G; n- S j, t
strategic difference, as well as the fact that Lochte is 23.25 seconds
4 O- b) r. E2 {5 W8 f. l3 U1 ufaster (4:05.18) than Ye overall, creates the illusion that a woman swam
- |6 @5 o3 `% u& T# P9 C" U. @9 F. ]& \faster than the best man in the same sport, which sounds impossible. Putting
; L6 w: B9 ?$ ~; e. gaside the gender argument, I believe this is still a leading question that4 W$ l8 @5 K' W: W, q$ ]
implies to the reader that there is something fishy going on." h! G0 Z3 ]- D) A8 |
6 `/ y) N. s2 L8 V; c. q! iFourth is another example of cherry-picking. In the same event, there are
! P; ]; D9 M8 r& |2 ^$ Lfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
$ c. O' l& }; [s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
9 N% b7 N( h, d), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
3 t5 o. _( x, [% u- Vout, if we are just talking about the last 50 metres in a 400-metre IM,
* Q- u* B; R0 N/ V/ p6 o- z! b* ]8 tLochter is not the example I would have used if I were the author. What kind
. e' Z4 v: y, h- cof scientific rigorousness is Callaway trying to demonstrate here? Is it5 b* X" _4 }7 _' O$ C) T T
logical that if Lochter is the champion, we should assume that he leads in& J( z* C8 U* S# o: f
every split? That would be a terrible way to teach the public how science; [; I/ s+ o. M
works.8 O/ S/ \, z' t
( I' M# n$ `0 G" N/ JFifth is the issue I oppose the most. Callaway quotes Ross Tucker and" N8 g+ W r6 ~2 ~, |( Y4 n1 h8 K
implies that a drug test cannot rule out the possibility of doping. Is this" S. W! X1 B! M* ^' ~- h. ]
kind of agnosticism what Nature really wants to teach its readers? By that
I. S' i3 t; [1 _2 Qstandard, I estimate that at least half of the peer-reviewed scientific( R$ W9 ~4 k0 u- i( q' \% F
papers in Nature should be retracted. How can one convince the editors and
+ i5 k! l) v c: U9 ?: K, i3 areviewers that their proposed theory works for every possible case? One, p4 T- Q: r9 ]# y( [/ o x) B
cannot. One chooses to apply the theory to typical examples and to
9 o- J% S9 u) A8 Q7 }demonstrate that in (hopefully) all scenarios considered, the theory works) K2 q9 g# n* @6 p2 @1 w- x
to a degree, and that that should warrant publication until a counterexample
' v+ i7 J6 q" a( pis found. I could imagine that Callaway has a sceptical mind, which is
: D5 t# ?5 V5 c! ecrucial to scientific thinking, but that would be put to better use if he
v, R0 h, j/ Q: Uwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
$ f! [, Q. b: Z7 T. v, i' j4 @advanced, non-detectable drug that the Chinese have come up with in the
* L) ?" r0 w% ?& r3 a- Xpast 4 years (they obviously did not have it in Beijing, otherwise why not
6 ~+ I8 E8 r- O. @7 g! H1 f5 xuse it and woo the audience at home?), based on data and rational derivation
* Q/ k* A& U& e d n6 q. This article, however, can be interpreted as saying that all athletes are
9 q! J$ W$ `" U' r" Zdoping and the authorities are just not good enough to catch them. That may, m9 v* n; y# B. r; Y5 c4 r
be true, logically, but definitely will not make the case if there is ever a5 k; g0 U( G. y L/ c8 M- a$ f9 H
hearing by the governing body for water sports, FINA, to determine if Ye
# ~ J+ p& o, S5 m2 j9 i! }% mhas doped. To ask whether it is possible to obtain a false negative in a0 y5 j$ Q* ^) \% K3 l) m% O
drug test looks like a rigged question to me. Of course it is possible:; V& a- n `5 e9 k+ r: b: J2 l
other than the athlete taking a drug that the test is not designed to detect. r$ p# S3 ~0 `& U5 H/ M0 j o# L
, anyone who has taken quantum 101 will tell you that everything is
$ _' M6 m' [+ S0 T" _5 Hprobabilistic in nature, and so there is a probability that the drug in an
3 D1 F# \+ ~# ?6 h0 ^athlete’s system could tunnel out right at the moment of the test. A slight
# V& J# U) J. x0 f: s' Ichance it may be, but should we disregard all test results because of it?
# K* x) @4 A/ d; Z2 u$ aLet’s be practical and reasonable, and accept that the World Anti-Doping
) H$ F! o; e, G3 ~, k4 M7 Jagency (WADA) is competent at its job. Ye’s urine sample will be stored for
1 {6 z$ p) r2 I2 B/ \( _5 Ueight years after the contest for future testing as technology advances.% V/ C! g( [% I$ a% _
Innocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-
2 R5 y2 z0 N1 r- X1 ^competition drug test is already in effect, which Callaway failed to mention6 N( J! X' l6 p
. As noted in the president of WADA’s press release, drug testing for
* T. K1 r. Z m/ p j( vOlympians began at least six months before the opening of the London2 [9 |0 c2 n5 N1 ^: ?
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
9 g0 R8 p/ p7 y8 i# r4 h1 Hdoping. That may be the reason that “everyone will pass at the Olympic% j# E3 J% R" u4 E0 D
games. Hardly anyone fails in competition testing” — those who did dope
6 g8 ^9 _, s3 X* o, |' vhave already been caught and sanctioned. Callaway is free to suggest that a4 ^+ s& F; E6 W3 A3 d2 c. Y
player could have doped beforehand and fooled the test at the game, but this
. d+ ?' q& [6 b; M& `5 d) [possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
2 q1 w& p! ? h. Vintentionally or not) cherry-pick data that, in my view, are far too
! p" I2 i( a' b- O1 msuggestive to be fair and unbiased. If you want to cover a story of a
) g D7 D2 {: E2 ], o+ ~/ s. o' ususpected doping from a scientific point of view, be impartial and provide
9 i0 E; O% H) Y7 R) Y8 Sall the facts for the reader to judge. You are entitled to your
, m& L. \6 F% kinterpretation of the facts, and the expression thereof in your piece,
4 k# E6 O3 u) R+ ?explicitly or otherwise, but showing only evidence that favours your
7 L& {3 _) _5 W( `1 P5 iargument is hardly good science or journalism. Such an article in a journal, j& J% G6 h3 x) s
such as Nature is not an appropriate example of how scientific research or
* S2 v9 w+ e3 A2 G. yreporting should be done. |
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