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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
6 |! Z. q0 C: @+ l$ t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
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5 i+ x6 F& {/ i5 Y4 L5 r' eFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself8 o5 R4 O/ k8 N- v" F& v# o
, regard as one of the most prestigious and influential physical-science
X9 }$ l7 t2 P# C. B; b( umagazines — publish a thinly veiled biased article like this. Granted, this
( u/ {( ]4 b W, ]is not a peer-reviewed scientific article and did not go through the; P+ v# `4 H) u+ O* |9 _
scrutiny of picking referees. But to serve as a channel for the general1 p# N0 ~( n& c! P6 g
populace to be in touch with and appreciate science, the authors and editors
; ^2 I4 w3 G5 R4 xshould at least present the readers with facts within the proper context,
0 H& T" z u# J3 F- a' X; Zwhich they blatantly failed to do.' R1 w* K+ S! X2 n' }& N
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First, to identify Ye’s performance increase, Ewen Callaway compared her
: f! e- J( Y6 {6 h9 OOlympic 400-metre IM time with her performance at the World Championships in1 {, M2 V. l) Q, s# H! ~; j
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ l5 E5 c% U9 C9 ]/ v% q. r
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous8 I8 D5 ^$ b" ?0 I3 e$ H j; j
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
* Y4 |4 l% ^4 T% X$ S1 M* I) Fimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the, s1 d/ o g7 o5 o# ?
difference between the gold and silver medal, I see no reason for 5.38 s to
5 z0 |; Q. e9 o5 Xbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is1 D/ s; @. t( w' B& _
still developing. Bettering oneself by 5 seconds over two years may seem8 K- ?4 V: m9 U) P
impossible for an adult swimmer, but it certainly happens among youngsters.
+ M* H1 h. J) j) N0 `/ }An interview with Australian gold medallist Ian Thorpe revealed that his 400
: T5 o3 W+ j, g* {$ ~2 o, U8 J6 U-metre freestyle time improved by 5 seconds between the ages of 15 and 16.. d! N0 ?7 U- x7 X) _: F
For regular people, including Callaway, it may be hard to imagine what an% I0 m4 |6 X) N7 I
elite swimmer can achieve as he or she matures and undergoes scientific and2 T+ [. g/ e1 F2 z: `
persistent training. But jumping to the conclusion that it is “anomalous”
: r& w/ K' i H! s" x+ m3 E0 @based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.& m8 Q: R: c% r2 j `
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook( ]0 f! M# M+ c S/ I. C+ a
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
0 K2 C6 U9 C1 o; X$ W0 {8 k8 Cthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 W" l' v8 ~) o$ i5 j5 G' @
he chose not to push himself too hard and to conserve his energy for later
2 I) g9 o. q5 Aevents (whether this conforms to the Olympic spirit and the ‘use one’s
9 f5 h* g# E4 [% Pbest efforts to win a match’ requirement that the Badminton World
, G2 r& q- V3 O2 }, ~Federation recently invoked to disqualify four badminton pairs is another/ j2 Q" b) f8 u* I' t
topic worth discussing, though probably not in Nature). Ye, on the other7 I. T7 A- m8 O
hand, was trailing behind after the first 300 metres and relied on freestyle, R# Q* S8 s" `; e; K9 ~7 k+ {( f
, in which she has an edge, to win the race. Failing to mention this( N; z* {$ S. ^6 o8 x: P" m
strategic difference, as well as the fact that Lochte is 23.25 seconds
5 ]/ t9 u0 h3 Y) G2 R, ^# n( bfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
) `7 W8 e* v2 n# d2 g. A3 y7 Pfaster than the best man in the same sport, which sounds impossible. Putting
( ^1 Y+ a! _( ?* maside the gender argument, I believe this is still a leading question that: z8 p. u0 `5 i/ T
implies to the reader that there is something fishy going on.
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& Z m# i" R1 f. fFourth is another example of cherry-picking. In the same event, there are
; g c' k* {; Mfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 {" z( @5 F2 }$ f( g6 Js) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
; y9 Z" e& N* o7 n), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns3 L9 y8 Z1 D! {8 t$ E1 h
out, if we are just talking about the last 50 metres in a 400-metre IM," x9 W" t* Y! H4 Q" C; h
Lochter is not the example I would have used if I were the author. What kind' [7 f, ?. f8 W6 V. @) D
of scientific rigorousness is Callaway trying to demonstrate here? Is it
! q) U1 s6 l( M. hlogical that if Lochter is the champion, we should assume that he leads in
" X+ R* z) v- {every split? That would be a terrible way to teach the public how science8 p. F8 ]1 g- Z+ G, }" V7 Q* d8 H
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
p# Y0 ?3 L& T: X/ jimplies that a drug test cannot rule out the possibility of doping. Is this
5 X1 O# K- v# L. J3 @) @kind of agnosticism what Nature really wants to teach its readers? By that
/ f0 j) U) L8 s% j+ Astandard, I estimate that at least half of the peer-reviewed scientific" g6 m9 H* n% [/ f* |4 D
papers in Nature should be retracted. How can one convince the editors and/ F( f. e7 o) ^
reviewers that their proposed theory works for every possible case? One
) C! H' }2 Z5 z, L7 J/ [0 tcannot. One chooses to apply the theory to typical examples and to( h/ o3 r. I7 d2 t# t" q2 h% z' x5 o0 `
demonstrate that in (hopefully) all scenarios considered, the theory works. s1 C) c: H3 m+ M5 ^
to a degree, and that that should warrant publication until a counterexample
# W3 ^* h* Z2 Jis found. I could imagine that Callaway has a sceptical mind, which is* G0 L; v8 p' |$ V* L+ z
crucial to scientific thinking, but that would be put to better use if he/ G' D1 F5 }3 ?: I- M4 R* R
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
3 Z, v# m7 N% I, e3 u* @9 q3 @advanced, non-detectable drug that the Chinese have come up with in the
) b$ P; _8 L0 e; J! d& epast 4 years (they obviously did not have it in Beijing, otherwise why not* \* ^0 ?$ x+ E
use it and woo the audience at home?), based on data and rational derivation
& I& V, h4 T6 h% R' n4 Z8 a; l6 X( G5 U. This article, however, can be interpreted as saying that all athletes are; e* y, L2 ] G! _
doping and the authorities are just not good enough to catch them. That may
; a. i' Y# q/ A+ r7 Abe true, logically, but definitely will not make the case if there is ever a
8 k. p' N0 f& J4 `% Nhearing by the governing body for water sports, FINA, to determine if Ye7 K* A I2 d$ A$ b& F8 ]; _
has doped. To ask whether it is possible to obtain a false negative in a
3 D) ?7 e z6 j4 F7 ^1 f- r2 h/ Xdrug test looks like a rigged question to me. Of course it is possible:% _, z9 I# @( A! L+ O
other than the athlete taking a drug that the test is not designed to detect# O% ^$ i D, O H
, anyone who has taken quantum 101 will tell you that everything is
$ u( e; J; Z- x8 P' X( uprobabilistic in nature, and so there is a probability that the drug in an1 ]" e+ t H" p+ W8 l
athlete’s system could tunnel out right at the moment of the test. A slight
3 b* M0 o. U; H3 l. `4 schance it may be, but should we disregard all test results because of it?- z2 M9 W4 G! ?: L( }% h3 U9 v1 i
Let’s be practical and reasonable, and accept that the World Anti-Doping
; z% W0 ?0 v3 y& w A& b3 jagency (WADA) is competent at its job. Ye’s urine sample will be stored for
1 I- w. V+ U8 w" y$ ?/ u/ Neight years after the contest for future testing as technology advances.
4 O0 S3 m1 O1 ^ X3 W2 C' cInnocent until proven guilty, shouldn’t it be?
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. c2 r( s: `$ [9 ]: lSixth, and the last point I would like to make, is that the out-of-' r2 z# s' v2 u1 p+ V
competition drug test is already in effect, which Callaway failed to mention7 O) f. e4 o& [; V! b$ C0 l
. As noted in the president of WADA’s press release, drug testing for3 h- A1 g5 l' D" Q1 i* h8 w* ~7 @ T4 H3 R
Olympians began at least six months before the opening of the London# t: u1 u3 J$ d+ r* _& X/ T
Olympics. Furthermore, 107 athletes have been banned from this Olympics for) r( i* \; p4 i6 q0 d
doping. That may be the reason that “everyone will pass at the Olympic
' G/ m+ O6 B) ~) Tgames. Hardly anyone fails in competition testing” — those who did dope4 k8 [1 k2 Q! o/ f+ k/ }
have already been caught and sanctioned. Callaway is free to suggest that a
) z! \; K7 N, F! J* m) o: qplayer could have doped beforehand and fooled the test at the game, but this2 w) p1 I" R# J. o: _
possibility is certainly ruled out for Ye., a( ^6 `0 {( ]# z+ K
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Over all, even though Callaway did not falsify any data, he did (7 s, B9 |, {; o5 U: l* }
intentionally or not) cherry-pick data that, in my view, are far too
, j' g+ ]8 Q- g8 ksuggestive to be fair and unbiased. If you want to cover a story of a
3 k& P5 }- C: v1 w" Y3 Asuspected doping from a scientific point of view, be impartial and provide
1 ?7 G. N* O: K, [all the facts for the reader to judge. You are entitled to your. ^( a5 G; |7 v& R) X
interpretation of the facts, and the expression thereof in your piece,
9 D6 L; ~- S( ?- {% i1 n2 u. }explicitly or otherwise, but showing only evidence that favours your
& Y! S7 c. Y2 nargument is hardly good science or journalism. Such an article in a journal
, A$ a' S2 ~4 @/ ^/ t+ osuch as Nature is not an appropriate example of how scientific research or L" B( r2 g6 z. U- a& Z& V
reporting should be done. |
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