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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 JIANG3 g7 W' _+ b# [7 \1 \% F1 g5 B
如果是中国长大的,英语能到这种程度真是很不简单。0 f9 I7 u- ~& I, y
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html# U% @# Z" ^( l' q9 d, u
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FROM 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
4 O Z0 K! d' P% X, regard as one of the most prestigious and influential physical-science
1 M+ ]$ O0 m* A, z# N! F( Fmagazines — publish a thinly veiled biased article like this. Granted, this
. X3 ]) ~; ~2 f1 X r8 x5 l( nis not a peer-reviewed scientific article and did not go through the o9 F" g6 p4 ]1 D7 C
scrutiny of picking referees. But to serve as a channel for the general
! @6 A' Y8 _) }# x+ N/ Bpopulace to be in touch with and appreciate science, the authors and editors
3 L7 A! o2 m. C; Z& l( v/ jshould at least present the readers with facts within the proper context,
) c% x+ f5 e6 ^# n9 }which they blatantly failed to do.; _2 C8 U- V& c, N7 L
* t' w; B5 m: }2 m8 a/ T9 a1 NFirst, to identify Ye’s performance increase, Ewen Callaway compared her( A* w8 P8 C @$ w
Olympic 400-metre IM time with her performance at the World Championships in3 E4 l/ R O8 {1 T
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
: X$ ]( t+ G0 S" zanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
. }: x$ x4 r G D5 h; wpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an* I( F$ Z& u1 ^- o4 O, H. w/ C- L
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
! K6 t5 H) o5 z3 F. A. P$ edifference between the gold and silver medal, I see no reason for 5.38 s to
3 S# P1 r/ v/ wbe treated as 7 s.7 X7 W( v- `6 W! Z" O- z( b
& ]8 j& l$ g0 y. g* J7 ~Second, as previously pointed out, Ye is only 16 years old and her body is- v6 |: V: a( R( t& V3 m- P3 \
still developing. Bettering oneself by 5 seconds over two years may seem
* r, ]9 R$ Y" S- y3 }impossible for an adult swimmer, but it certainly happens among youngsters.9 F& V1 i/ C- I! a
An interview with Australian gold medallist Ian Thorpe revealed that his 400* Y* C# E5 R4 n( h( C% y
-metre freestyle time improved by 5 seconds between the ages of 15 and 16." Q% |& E2 h& h9 h
For regular people, including Callaway, it may be hard to imagine what an s/ v2 G) ~& i& I% A* M: G9 K/ `
elite swimmer can achieve as he or she matures and undergoes scientific and* T4 ]9 _: A' V6 B+ x: ^8 L5 `
persistent training. But jumping to the conclusion that it is “anomalous”
% j$ Q+ o: Y9 O. A4 H1 l/ L5 |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
3 V& x/ v) b$ ~" I" ?# P+ M l/ l$ Mexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
4 V; a% r: G* T0 l& K- P* F! b @the last 50 metres, but Lochte had a huge lead in the first 300 metres, so6 g2 y3 H& m/ c
he chose not to push himself too hard and to conserve his energy for later% y6 b) R! ~! E
events (whether this conforms to the Olympic spirit and the ‘use one’s9 [ i9 x& g: M F* y' a: g( l1 R0 r
best efforts to win a match’ requirement that the Badminton World! t* L4 i% V" D- |/ i7 ^0 F
Federation recently invoked to disqualify four badminton pairs is another! R5 K: v" i; K. w1 q# t: {. f
topic worth discussing, though probably not in Nature). Ye, on the other5 A' e+ e& |* z: u0 Z
hand, was trailing behind after the first 300 metres and relied on freestyle
: h3 W0 F) J3 V C, in which she has an edge, to win the race. Failing to mention this$ e d* Q( v' j, }$ f- N2 w
strategic difference, as well as the fact that Lochte is 23.25 seconds- @* M6 a# y1 }! c5 P
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
% |4 X# N0 X3 x' U/ }faster than the best man in the same sport, which sounds impossible. Putting! B; O2 j% v9 Y h& g( X
aside the gender argument, I believe this is still a leading question that
$ P" K$ X8 S4 N+ mimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are9 P5 c* e2 \7 C
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
) h2 N+ L9 ~$ d" S3 Ks) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
( C2 \: t7 r/ T1 x: W2 W2 S3 h9 K), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% G0 V6 h! v3 | d# E3 u2 Mout, if we are just talking about the last 50 metres in a 400-metre IM,
( k& x$ g6 f* ]; I9 fLochter is not the example I would have used if I were the author. What kind
% `( b6 d% Y5 s/ ^5 Xof scientific rigorousness is Callaway trying to demonstrate here? Is it q; G" T2 d, p5 v. _
logical that if Lochter is the champion, we should assume that he leads in
8 k1 c! d# D' L$ w* Fevery split? That would be a terrible way to teach the public how science
; t8 N6 S; j& W( Y6 ?/ o" @works.# _9 P* ^4 ?; T. ?5 _
& U5 k4 b9 i1 x1 M, mFifth is the issue I oppose the most. Callaway quotes Ross Tucker and+ \5 k# u% @, B4 j4 x- C5 c
implies that a drug test cannot rule out the possibility of doping. Is this
+ [5 c7 J0 U* ~; K; Wkind of agnosticism what Nature really wants to teach its readers? By that9 w) g# x* p5 x" d- w5 ?3 G
standard, I estimate that at least half of the peer-reviewed scientific, I: K9 _ B# c/ J2 v
papers in Nature should be retracted. How can one convince the editors and
* ]" w b4 Q) h$ greviewers that their proposed theory works for every possible case? One" `7 R0 J' ?) H* F- a
cannot. One chooses to apply the theory to typical examples and to2 r: A+ G) F8 t) _
demonstrate that in (hopefully) all scenarios considered, the theory works
% M+ d) v6 p9 m- A' ito a degree, and that that should warrant publication until a counterexample
( T" I0 f Y2 k9 u8 T+ |& t9 j: Ais found. I could imagine that Callaway has a sceptical mind, which is
" f( a7 W. }3 ycrucial to scientific thinking, but that would be put to better use if he+ [5 }1 K+ c: r5 b9 ~6 k* N9 P
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
) X& E2 ~4 L$ o0 q9 x9 H+ G6 Q& Jadvanced, non-detectable drug that the Chinese have come up with in the1 T# n2 K. f# B" t; n
past 4 years (they obviously did not have it in Beijing, otherwise why not
4 A7 U5 Z9 C% f' R" r4 euse it and woo the audience at home?), based on data and rational derivation# \6 e; Y! z) a& m: ?* q7 z0 s
. This article, however, can be interpreted as saying that all athletes are
3 N- z+ d& {" S6 C- Sdoping and the authorities are just not good enough to catch them. That may) f7 s y4 O: l: _8 B/ L. j
be true, logically, but definitely will not make the case if there is ever a- p$ k& a8 M" `. b4 d( T; w5 l3 z
hearing by the governing body for water sports, FINA, to determine if Ye) J8 p$ a. {" e {% P
has doped. To ask whether it is possible to obtain a false negative in a
& W6 _& r* l2 M4 ^/ {! f y# Z# g; qdrug test looks like a rigged question to me. Of course it is possible:
: `) m( L2 _1 w! g( x1 ?+ F" @other than the athlete taking a drug that the test is not designed to detect% p" O5 @! ?+ Y( ]. |8 G
, anyone who has taken quantum 101 will tell you that everything is0 x D/ F3 X. i s
probabilistic in nature, and so there is a probability that the drug in an
8 u* U! ]' ]! N* @. g. Rathlete’s system could tunnel out right at the moment of the test. A slight# h0 @# ]4 ~& C" f3 Z& H7 s$ g3 ~
chance it may be, but should we disregard all test results because of it?/ D" [5 z9 x/ X* `: K6 d& w
Let’s be practical and reasonable, and accept that the World Anti-Doping! ]- p' K4 M3 q+ ^. T- W
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
, q! ]- ]8 `/ }( b/ }* Xeight years after the contest for future testing as technology advances./ |' S3 C/ ]( m9 M$ }3 }
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-
+ `% X) @6 g mcompetition drug test is already in effect, which Callaway failed to mention
$ {! \0 Q* m' b* I9 I- ?% v. G. As noted in the president of WADA’s press release, drug testing for
, \+ a$ d |, u; c9 GOlympians began at least six months before the opening of the London, H% ?& E# v# S% {
Olympics. Furthermore, 107 athletes have been banned from this Olympics for' c& N/ t* h% \# O- P! D* ?9 `9 s, ?
doping. That may be the reason that “everyone will pass at the Olympic' M; l/ W8 T; d( {7 T
games. Hardly anyone fails in competition testing” — those who did dope2 m, @7 P, [% H: r- n3 A
have already been caught and sanctioned. Callaway is free to suggest that a7 D, V2 z- C, ^" ?) |
player could have doped beforehand and fooled the test at the game, but this" a* h% o$ O) y1 j% t
possibility is certainly ruled out for Ye.8 C+ O( ^% V9 n, g8 |7 N. B
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Over all, even though Callaway did not falsify any data, he did (# C% M4 f0 B/ A3 G
intentionally or not) cherry-pick data that, in my view, are far too2 a# \) m6 n5 j$ b/ y
suggestive to be fair and unbiased. If you want to cover a story of a: ?3 @! _5 I, \
suspected doping from a scientific point of view, be impartial and provide
' R/ x$ f7 J8 G! U( m4 Eall the facts for the reader to judge. You are entitled to your
+ f, }/ e0 ^. H8 n \; Jinterpretation of the facts, and the expression thereof in your piece,$ W/ `2 z6 l; w# k# U5 t
explicitly or otherwise, but showing only evidence that favours your
' A' D$ \& Z4 P* b U9 @) `- e: oargument is hardly good science or journalism. Such an article in a journal
7 F' F' U( B/ w) |, ?such as Nature is not an appropriate example of how scientific research or
0 q. ]9 Z: j! R$ freporting should be done. |
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