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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
/ U$ D. @5 O6 }. V& W$ }2 @- W2 k如果是中国长大的,英语能到这种程度真是很不简单。) \* w n, H- p. Q
) ?( M* Y/ C5 M5 F1 y5 Lhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" w Z. E4 w% E% Z
, c2 K" T A9 B& GFROM 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
" ^% J$ `& T6 q1 p9 \% t, regard as one of the most prestigious and influential physical-science
9 D3 ?: P: c4 z' Amagazines — publish a thinly veiled biased article like this. Granted, this# e$ F6 O; j: c' n1 x
is not a peer-reviewed scientific article and did not go through the, m1 F8 u7 z, @" Q- H3 s
scrutiny of picking referees. But to serve as a channel for the general
4 D2 U4 V+ u+ l7 F# D" w1 lpopulace to be in touch with and appreciate science, the authors and editors
0 I9 f4 n& a' V5 \should at least present the readers with facts within the proper context,
5 z/ C+ `* Q' l' h0 bwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her8 f9 X' K5 q3 k: ?# v
Olympic 400-metre IM time with her performance at the World Championships in# s/ H6 l# J" q* B- Z$ Z
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
; Y& j0 T. V8 I/ R- Uanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
& k0 G" I; E$ ]. w9 v; xpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
& c" `+ M, r3 i4 Himprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
$ o& R" s4 r2 {: O$ Cdifference between the gold and silver medal, I see no reason for 5.38 s to
( [2 e3 Z* R5 M) r: F! Z/ H8 Ibe treated as 7 s.* ]' W$ N3 K) W/ |0 H+ m
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Second, as previously pointed out, Ye is only 16 years old and her body is
. X5 r7 p% B8 |7 ?8 l9 `4 Mstill developing. Bettering oneself by 5 seconds over two years may seem" ?6 r u. g! M" U! i# X5 k1 ~
impossible for an adult swimmer, but it certainly happens among youngsters.
, y) V" h9 J8 n: M) J0 j* MAn interview with Australian gold medallist Ian Thorpe revealed that his 400, C& h! D& H% o
-metre freestyle time improved by 5 seconds between the ages of 15 and 16." A+ I/ _+ R/ u. ? \
For regular people, including Callaway, it may be hard to imagine what an: g$ O( o: h `5 `0 _
elite swimmer can achieve as he or she matures and undergoes scientific and) n) ^0 m: j1 Z8 ~' ~7 L7 h$ E
persistent training. But jumping to the conclusion that it is “anomalous”! o6 s4 M6 f, F0 [. a' P2 n/ J
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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5 b) a7 F; | O9 UThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
* {6 C* m. f* }0 ~ R. R& Wexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
2 U4 e3 r% @; U R+ T4 C0 T* u! ?7 B+ c8 Tthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
$ h4 g+ o4 i3 F; Qhe chose not to push himself too hard and to conserve his energy for later/ U1 e' R2 B2 ], N7 {. E. x
events (whether this conforms to the Olympic spirit and the ‘use one’s
# v+ M9 x/ m+ k+ D& I' d% \best efforts to win a match’ requirement that the Badminton World* X7 h7 `" E! Y
Federation recently invoked to disqualify four badminton pairs is another5 J0 A0 w4 c2 \* G) i
topic worth discussing, though probably not in Nature). Ye, on the other
, K; o y4 S! ]% i8 n' U# _; Ahand, was trailing behind after the first 300 metres and relied on freestyle0 T7 k) C. G5 ~ ^! I2 e% o
, in which she has an edge, to win the race. Failing to mention this+ X$ I( L# {1 Y& q7 o- ~" o- M8 M
strategic difference, as well as the fact that Lochte is 23.25 seconds9 }7 ?' U& ]7 c8 P
faster (4:05.18) than Ye overall, creates the illusion that a woman swam( N' ]" L) s/ H/ H
faster than the best man in the same sport, which sounds impossible. Putting
; _9 B3 l. Z9 `aside the gender argument, I believe this is still a leading question that# r7 I" }" W0 W
implies to the reader that there is something fishy going on.
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: D. L4 q# l4 _( L$ EFourth is another example of cherry-picking. In the same event, there are
S& T7 V, c3 [four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
1 b/ }% R5 d; o8 ?s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
' X% O' R* E5 J. E! t2 t) `3 _), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns! S: q: c1 S4 E4 p$ t; U
out, if we are just talking about the last 50 metres in a 400-metre IM,+ J5 l9 K- w+ M1 g& ?2 z
Lochter is not the example I would have used if I were the author. What kind9 e, c; o/ X/ o- y3 A: O; M
of scientific rigorousness is Callaway trying to demonstrate here? Is it3 p; }: A C" l% U; m9 h
logical that if Lochter is the champion, we should assume that he leads in
1 a: }7 x& Z) s) x3 jevery split? That would be a terrible way to teach the public how science( w; P4 e+ d2 q1 S8 j4 G9 z
works.1 a1 C1 L% O3 h- N: `+ v3 u
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
' u5 Q0 y, B! m/ Iimplies that a drug test cannot rule out the possibility of doping. Is this
6 E9 j+ Y2 [+ j3 w+ fkind of agnosticism what Nature really wants to teach its readers? By that5 a4 {( B" x. G% [+ h3 n- p
standard, I estimate that at least half of the peer-reviewed scientific
8 l1 Z- R' f3 u; r' e7 kpapers in Nature should be retracted. How can one convince the editors and
4 X q+ v2 N( E7 C% A, O! _reviewers that their proposed theory works for every possible case? One! n( @, }; m$ Y- s& k6 e
cannot. One chooses to apply the theory to typical examples and to
! }! ~* w$ t4 w/ fdemonstrate that in (hopefully) all scenarios considered, the theory works6 [4 H7 R3 {6 W4 L3 O, q0 y
to a degree, and that that should warrant publication until a counterexample3 Q0 O' S" E9 b# \" M' B9 X
is found. I could imagine that Callaway has a sceptical mind, which is, \. a2 X r- E* `( l
crucial to scientific thinking, but that would be put to better use if he
; u$ { z1 ~- Lwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
) d9 a0 Z: S Y: B% n" Zadvanced, non-detectable drug that the Chinese have come up with in the
, [ O9 M( S( `! h) hpast 4 years (they obviously did not have it in Beijing, otherwise why not
3 q% G" ?1 v# ~9 n' a$ b$ juse it and woo the audience at home?), based on data and rational derivation
. }4 E5 b! W3 ?: d5 Z2 A+ z, x. This article, however, can be interpreted as saying that all athletes are+ d$ P- y, n# n9 e* V0 q2 ~! u8 {# ~
doping and the authorities are just not good enough to catch them. That may4 v1 U) [) u0 o. L2 D
be true, logically, but definitely will not make the case if there is ever a1 @( [2 ^! y6 Y7 W7 E8 M
hearing by the governing body for water sports, FINA, to determine if Ye. q1 F" `5 L# l' I
has doped. To ask whether it is possible to obtain a false negative in a, A" P# }+ |' ^, D
drug test looks like a rigged question to me. Of course it is possible:( b# w. Q2 p& h+ v; e0 T" W. i
other than the athlete taking a drug that the test is not designed to detect5 K1 I+ c% t% b5 [# ]% U2 U0 n: Q
, anyone who has taken quantum 101 will tell you that everything is$ c- I0 _1 ^. Y: T. O0 ~3 C8 g
probabilistic in nature, and so there is a probability that the drug in an. O. Z" y4 c: f1 J7 A5 C
athlete’s system could tunnel out right at the moment of the test. A slight
, |/ a6 n4 C' C. ^+ K" r9 h% X( Jchance it may be, but should we disregard all test results because of it?2 W# Y7 q6 i/ v0 }$ k, |! d4 r. \
Let’s be practical and reasonable, and accept that the World Anti-Doping
$ H7 D/ k B ~- ]agency (WADA) is competent at its job. Ye’s urine sample will be stored for O4 O8 M7 E9 k0 z5 A) K+ b
eight years after the contest for future testing as technology advances.0 b$ n5 d9 v. {$ T
Innocent until proven guilty, shouldn’t it be?
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; J% q0 c+ B* u4 R. G3 x5 nSixth, and the last point I would like to make, is that the out-of-' x; [0 w( h6 C Z M: j& V6 Z
competition drug test is already in effect, which Callaway failed to mention* M a* u9 g& C% U
. As noted in the president of WADA’s press release, drug testing for
$ l/ j5 @( \- M6 Z9 lOlympians began at least six months before the opening of the London- O( I8 D1 y' M6 T2 c# a& H
Olympics. Furthermore, 107 athletes have been banned from this Olympics for2 ]5 h" i" X$ i* t
doping. That may be the reason that “everyone will pass at the Olympic
4 W" k1 d# @4 c5 {* Ngames. Hardly anyone fails in competition testing” — those who did dope
: z" F$ l& _% g. P" Ohave already been caught and sanctioned. Callaway is free to suggest that a( }; W& x$ z6 V, Q5 |+ d" D5 W
player could have doped beforehand and fooled the test at the game, but this: P; x9 l- `% ]0 l/ C) m% S
possibility is certainly ruled out for Ye./ D, c( {/ ^! o
) ~( M8 C7 [2 }' f) e% g9 u$ HOver all, even though Callaway did not falsify any data, he did (
: o. @0 _# E5 A; H9 n, yintentionally or not) cherry-pick data that, in my view, are far too
2 P- w$ B% O% C$ n1 V2 }9 psuggestive to be fair and unbiased. If you want to cover a story of a, G' Y1 U; n" ]" g% |
suspected doping from a scientific point of view, be impartial and provide9 S9 T |9 a! |" B, J
all the facts for the reader to judge. You are entitled to your
% v, h) m- H A- e R$ j, x) r" minterpretation of the facts, and the expression thereof in your piece,
5 F. s: ~3 C0 Nexplicitly or otherwise, but showing only evidence that favours your0 d2 z7 u) [$ N+ z
argument is hardly good science or journalism. Such an article in a journal) w9 m: U3 s) \6 c7 j6 V
such as Nature is not an appropriate example of how scientific research or
4 A# d. h! f& e/ T6 Zreporting should be done. |
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