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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
8 q' ~* H& e# k _/ ?1 N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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8 e# t& P% N$ N+ S( K& chttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" S ~* c2 Z- G. W) a0 d) W& c
0 Y+ |! b" P4 W, b# u8 M0 Z: wFROM 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
7 a, o4 l4 X2 c, ?* s, regard as one of the most prestigious and influential physical-science) Z: ~% W J$ b& Y$ G
magazines — publish a thinly veiled biased article like this. Granted, this J8 w8 y6 H2 }- q# c: s6 d* o
is not a peer-reviewed scientific article and did not go through the
# `6 t' }8 A% [" u) M! Dscrutiny of picking referees. But to serve as a channel for the general
. j W, m9 B- e( e. X1 r' Npopulace to be in touch with and appreciate science, the authors and editors7 e$ R4 Y3 M m5 D
should at least present the readers with facts within the proper context,- s$ i' \0 N F6 Z% l
which they blatantly failed to do.
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" L3 e4 m8 x9 d6 M* t- k, @/ p' MFirst, to identify Ye’s performance increase, Ewen Callaway compared her
* b& u# y/ H$ {6 y$ }2 I8 G; ?Olympic 400-metre IM time with her performance at the World Championships in
. P4 P- W( ^5 J6 ]2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “2 ?% N8 f' ~( E) Z; c
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
) M! E X9 N9 Z+ W8 I4 L' w E' k# Fpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an/ E: K& \) m6 I3 F, b1 K
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the! E0 x1 @5 P( I! i7 o6 k% Q
difference between the gold and silver medal, I see no reason for 5.38 s to
. x& y8 n0 y& w# _& ~6 ]be treated as 7 s.( @$ a" d' Z$ Z0 c
6 Q, x+ O" q" o$ A7 ySecond, as previously pointed out, Ye is only 16 years old and her body is% t; y( ] I! H
still developing. Bettering oneself by 5 seconds over two years may seem/ C m2 e2 N7 @+ W1 p1 }; p0 [6 ]: u
impossible for an adult swimmer, but it certainly happens among youngsters.- }" s) r, N+ ~, L- f5 u" Z- f) u
An interview with Australian gold medallist Ian Thorpe revealed that his 400
2 H7 c% `, U4 L+ L% } ?4 L-metre freestyle time improved by 5 seconds between the ages of 15 and 16.) H2 V6 ^2 _" \' b
For regular people, including Callaway, it may be hard to imagine what an5 e3 l1 T3 Q5 R8 A1 z( F: ^/ T
elite swimmer can achieve as he or she matures and undergoes scientific and* ~1 j" J; Z: s, S
persistent training. But jumping to the conclusion that it is “anomalous”' L4 `2 D/ h: [
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
" o% L4 r7 A- P; P8 [- j; uexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 B" N* H* q% e8 U
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
3 t" M, |3 s' b( Ahe chose not to push himself too hard and to conserve his energy for later, X7 N' X: l9 p2 k' j' X) \
events (whether this conforms to the Olympic spirit and the ‘use one’s
! J ]9 R* g/ C) H0 k6 {9 gbest efforts to win a match’ requirement that the Badminton World' Y L+ q) @+ `4 c0 H
Federation recently invoked to disqualify four badminton pairs is another* j9 n) T4 ]* R6 x8 C8 P
topic worth discussing, though probably not in Nature). Ye, on the other4 J3 C- E( M- B, o3 `
hand, was trailing behind after the first 300 metres and relied on freestyle
: x; M# b0 v0 S0 _: a, in which she has an edge, to win the race. Failing to mention this
6 `7 `2 m4 G3 {: c3 z8 gstrategic difference, as well as the fact that Lochte is 23.25 seconds$ y6 X( f# ]6 X. E$ g* x
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
$ ?- @1 V8 K8 P9 @4 M+ M$ Ifaster than the best man in the same sport, which sounds impossible. Putting, I( T* A9 `1 G# \+ R/ P' D0 G
aside the gender argument, I believe this is still a leading question that
- i9 n% j& m4 \1 P! v! ]( }implies to the reader that there is something fishy going on.% P* V# H! x1 L) _7 o+ Q. p E
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Fourth is another example of cherry-picking. In the same event, there are2 B! u' S4 t8 U5 _$ o4 V
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93* P7 [$ [; A+ V5 |) I7 B
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s( k7 g3 g1 I. Z( v/ t6 t
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
0 g3 |3 |, _! [. z% P* lout, if we are just talking about the last 50 metres in a 400-metre IM,; D/ e/ ~8 P) _2 `7 x
Lochter is not the example I would have used if I were the author. What kind
6 d: k5 ]( k# hof scientific rigorousness is Callaway trying to demonstrate here? Is it S) d; _- |8 ?/ R1 a. W( ~
logical that if Lochter is the champion, we should assume that he leads in
) q# |8 O0 q' {4 ~3 x3 K& p& revery split? That would be a terrible way to teach the public how science
5 K0 q! L5 o# P+ T6 B6 bworks.
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6 L8 y* p2 G( |: i8 G S8 V5 R0 |Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
1 E$ A/ `, L1 D( G( U9 A$ Oimplies that a drug test cannot rule out the possibility of doping. Is this
+ R- K6 ~$ d9 Y- ~9 a* ~kind of agnosticism what Nature really wants to teach its readers? By that' g; D) K; s! [7 q+ t* e7 F X
standard, I estimate that at least half of the peer-reviewed scientific
1 O+ m. p: v1 n U1 _5 spapers in Nature should be retracted. How can one convince the editors and
7 k9 ?* @: Q2 {# Yreviewers that their proposed theory works for every possible case? One
8 Q( p- [; W4 P0 K. E6 X* Y( wcannot. One chooses to apply the theory to typical examples and to
: ?8 Z- |8 T: Hdemonstrate that in (hopefully) all scenarios considered, the theory works/ b9 p- m0 m% o0 r; v
to a degree, and that that should warrant publication until a counterexample
! E" A; z& ?6 K& M; `. Xis found. I could imagine that Callaway has a sceptical mind, which is# u1 P" ]' p' F C* y- i. ?
crucial to scientific thinking, but that would be put to better use if he8 a X9 |% n: ]. f+ K- {
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly. L$ B5 k7 a. q& T/ u
advanced, non-detectable drug that the Chinese have come up with in the
5 s* r5 y& a; u& J: [1 r/ }& Z8 bpast 4 years (they obviously did not have it in Beijing, otherwise why not
% o9 y G( `$ S- u+ H& Fuse it and woo the audience at home?), based on data and rational derivation* T8 v+ w5 H6 ?, D: Y. z6 U& n {
. This article, however, can be interpreted as saying that all athletes are" ]& ]" x1 |$ Z6 j1 i
doping and the authorities are just not good enough to catch them. That may
0 b2 |4 Q& _+ \$ L. c3 e4 Rbe true, logically, but definitely will not make the case if there is ever a) m, @' E# M8 {6 G) V7 J
hearing by the governing body for water sports, FINA, to determine if Ye( d% s: @* e2 _* _1 `* y
has doped. To ask whether it is possible to obtain a false negative in a2 j4 C" n% y, K: ^! i& Y
drug test looks like a rigged question to me. Of course it is possible:
# ~5 I+ m3 ~1 H- P; W' H6 t: cother than the athlete taking a drug that the test is not designed to detect
/ W, q B" y/ a* W) [7 p, anyone who has taken quantum 101 will tell you that everything is9 l; }9 T- z0 X# e0 H+ b
probabilistic in nature, and so there is a probability that the drug in an2 C v$ [, N8 ?6 p
athlete’s system could tunnel out right at the moment of the test. A slight
& i% e6 K: I$ c% ychance it may be, but should we disregard all test results because of it?6 p7 f3 {, g7 C$ K9 ]
Let’s be practical and reasonable, and accept that the World Anti-Doping# }- H% w- S7 j* W" K; u* r) I
agency (WADA) is competent at its job. Ye’s urine sample will be stored for$ F7 M) p/ l+ e
eight years after the contest for future testing as technology advances.
, ]6 h7 _3 S) @+ B2 uInnocent until proven guilty, shouldn’t it be?- J2 M6 O8 s% L z
6 b5 r4 @2 k8 G M& P8 [, `' u* T oSixth, and the last point I would like to make, is that the out-of-' A# N- j3 a2 ?3 Z$ u$ V! W9 m/ y! B
competition drug test is already in effect, which Callaway failed to mention
1 t5 D$ r& J! g; |7 F/ u; \2 P. As noted in the president of WADA’s press release, drug testing for
9 i S& r ?; s0 R/ _% OOlympians began at least six months before the opening of the London( [1 q; L1 J+ c% @; a; s( ^. i
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
# B; z$ F3 [7 \' rdoping. That may be the reason that “everyone will pass at the Olympic3 Y! Q+ m2 \ n
games. Hardly anyone fails in competition testing” — those who did dope
8 P' M! l2 l e9 qhave already been caught and sanctioned. Callaway is free to suggest that a
7 K2 c& o( m3 N: rplayer could have doped beforehand and fooled the test at the game, but this6 Y5 w6 t# s1 d2 n
possibility is certainly ruled out for Ye.
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3 H+ j/ B; p$ a0 N1 BOver all, even though Callaway did not falsify any data, he did (
5 |5 x! y( g" p( bintentionally or not) cherry-pick data that, in my view, are far too1 [+ n' T$ C& M; n6 Y; {% t% f
suggestive to be fair and unbiased. If you want to cover a story of a2 q) ^* \1 f/ _
suspected doping from a scientific point of view, be impartial and provide
* m/ A6 I, ^4 _% j8 V7 I1 fall the facts for the reader to judge. You are entitled to your, U3 f/ w5 I3 W1 A& \, \9 ]) l. G1 d
interpretation of the facts, and the expression thereof in your piece,
0 H# B2 W$ @, `; i# @7 n' ]explicitly or otherwise, but showing only evidence that favours your/ m5 Y- K4 B8 `; X6 t* l
argument is hardly good science or journalism. Such an article in a journal
! m$ a" j4 J( B. ~5 L- p- m$ Gsuch as Nature is not an appropriate example of how scientific research or
% B( d. m' }7 e6 c# _; Y8 Creporting should be done. |
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