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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 JIANG0 g' b" Q% n/ M
如果是中国长大的,英语能到这种程度真是很不简单。- Q' L: t/ b9 K
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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* N/ b! ?, ^4 [5 d% WFROM LAI JIANG, Department of Chemistry, University of Pennsylvania: D* j# z- F4 M0 \
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It is a shame to see Nature — which nearly all scientists, including myself, a$ c! ^4 q" T4 {- B
, regard as one of the most prestigious and influential physical-science
; k* e4 y" D) @0 @magazines — publish a thinly veiled biased article like this. Granted, this3 t! v# N" s6 M) U
is not a peer-reviewed scientific article and did not go through the
! |" X" I7 n+ ^+ Rscrutiny of picking referees. But to serve as a channel for the general* O/ f7 m: @( B' E
populace to be in touch with and appreciate science, the authors and editors8 R( e( \: U" c, Q
should at least present the readers with facts within the proper context,
1 y! }1 @4 t, S8 iwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
{1 s! \4 b& h: iOlympic 400-metre IM time with her performance at the World Championships in
`* O1 v5 c# a& }+ g9 B- l" D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “/ p* ]/ k6 r( E$ a+ {1 C
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
3 ~- p! ^" l3 cpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an( x# i7 I/ U1 O' B2 g0 {0 i
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the6 @# L1 z$ w. N! B* h5 {" M, p
difference between the gold and silver medal, I see no reason for 5.38 s to
* L1 j; f' |0 g9 k' E3 K, dbe treated as 7 s.5 f- o+ T( A0 C1 m
U, w% J* Z# P5 vSecond, as previously pointed out, Ye is only 16 years old and her body is# z: Z, a9 s8 q! n7 A& i
still developing. Bettering oneself by 5 seconds over two years may seem1 o2 p* H+ \, A9 c# t
impossible for an adult swimmer, but it certainly happens among youngsters.
^ ^/ s4 O+ ?5 F* q; m+ HAn interview with Australian gold medallist Ian Thorpe revealed that his 400# a) x9 N \- m
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 ]" `. w- q" v- l' z+ U$ wFor regular people, including Callaway, it may be hard to imagine what an- W. ^# @" S4 L
elite swimmer can achieve as he or she matures and undergoes scientific and
% `* g8 n2 O$ T. I8 t( k4 vpersistent training. But jumping to the conclusion that it is “anomalous”
5 |; P! I/ J& e4 I# G( obased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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+ ~' Y5 v2 l- s0 Q1 y6 q- d9 xThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
# Y; p" n7 _+ {9 J" I: s$ zexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in+ ^) H5 `5 C8 @8 b! P8 k& @
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so4 m" w# K8 M0 W+ l& @0 F
he chose not to push himself too hard and to conserve his energy for later( [" | z# x# Y! L8 [
events (whether this conforms to the Olympic spirit and the ‘use one’s
. R" N$ f& X- j" T& R8 [! n* ebest efforts to win a match’ requirement that the Badminton World9 U+ d+ I/ @" V0 X# G+ ~( P
Federation recently invoked to disqualify four badminton pairs is another; t/ l, E1 T. ~1 n4 Q+ p! r( L$ l
topic worth discussing, though probably not in Nature). Ye, on the other ~; r8 ?* N9 e% Y0 A5 q: S
hand, was trailing behind after the first 300 metres and relied on freestyle
& `) C7 i* G8 M( I, in which she has an edge, to win the race. Failing to mention this/ [0 K9 q: u8 {1 X2 D5 X
strategic difference, as well as the fact that Lochte is 23.25 seconds2 G9 e4 _( ?3 Z3 x
faster (4:05.18) than Ye overall, creates the illusion that a woman swam4 |. f0 `8 H) e0 |
faster than the best man in the same sport, which sounds impossible. Putting
% f2 D, _' o. g/ N! taside the gender argument, I believe this is still a leading question that/ {, T7 Q6 j s& G
implies to the reader that there is something fishy going on.
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: g; m. S' Y8 y$ {& z" oFourth is another example of cherry-picking. In the same event, there are. W+ O. y* t! n6 Y; z; g
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 Z5 n5 v, x$ ]! U7 Gs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s; Y6 C0 ?* A/ e- p' A* k" r
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
( d! m) E* R+ Cout, if we are just talking about the last 50 metres in a 400-metre IM,* S5 Y) j, _ O
Lochter is not the example I would have used if I were the author. What kind
: p3 B2 k; p1 e Y3 ]of scientific rigorousness is Callaway trying to demonstrate here? Is it
- u O& @$ Y7 r. J4 E+ B; z; flogical that if Lochter is the champion, we should assume that he leads in
) v5 `" M: r5 e- P" \. v) x- Tevery split? That would be a terrible way to teach the public how science& Z0 L* b; |3 E) q) T
works.' U8 S, U- w' S: M
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and2 {9 v) w7 ^# P1 M% f0 M, ^
implies that a drug test cannot rule out the possibility of doping. Is this
" O+ y5 j1 h' O( H5 E7 W5 ?; Nkind of agnosticism what Nature really wants to teach its readers? By that# v% Q' G4 W$ u% P' @
standard, I estimate that at least half of the peer-reviewed scientific
) F- l' m2 n1 F+ `5 d: ?! v; Lpapers in Nature should be retracted. How can one convince the editors and
; z5 `' a- Z8 S5 s6 y* N$ Previewers that their proposed theory works for every possible case? One6 ^0 ]+ u2 ]2 \
cannot. One chooses to apply the theory to typical examples and to
9 Q3 ~ A. s0 @5 D9 k, B0 gdemonstrate that in (hopefully) all scenarios considered, the theory works
! d+ s1 ~$ F8 z" F" ~6 ito a degree, and that that should warrant publication until a counterexample
/ h/ y2 ?$ _% e5 G- J9 @! Nis found. I could imagine that Callaway has a sceptical mind, which is1 d5 K2 W. F4 T1 [# c
crucial to scientific thinking, but that would be put to better use if he4 y. f# E) t7 C+ y4 W
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( {6 F _' b" I+ ^/ r4 u4 l% w
advanced, non-detectable drug that the Chinese have come up with in the; O( C1 G8 _+ ]% p) t; F8 M
past 4 years (they obviously did not have it in Beijing, otherwise why not9 ^, g' l- j, d/ Y" S4 z
use it and woo the audience at home?), based on data and rational derivation( N2 ]; |) S0 |7 L2 \, a
. This article, however, can be interpreted as saying that all athletes are
' G- [* @5 U8 r( ndoping and the authorities are just not good enough to catch them. That may% X6 K8 ]9 u4 I" a
be true, logically, but definitely will not make the case if there is ever a
1 ^! B! K8 ?* Ghearing by the governing body for water sports, FINA, to determine if Ye4 V K# E& |0 }5 I. o. L; ?
has doped. To ask whether it is possible to obtain a false negative in a% ~2 v1 J& o: F, F; Q, H0 H' f' b; m8 ~
drug test looks like a rigged question to me. Of course it is possible:2 l- k/ x$ q7 }* b) ^
other than the athlete taking a drug that the test is not designed to detect* l# V! a# Z$ J1 E, ?1 p, m
, anyone who has taken quantum 101 will tell you that everything is
+ H! ]! I/ q; x! M# Wprobabilistic in nature, and so there is a probability that the drug in an) @# \$ Y# j( E1 |$ p
athlete’s system could tunnel out right at the moment of the test. A slight; W0 o3 m5 a R
chance it may be, but should we disregard all test results because of it?! p I3 B3 P, \, d& {0 i$ Y: ]
Let’s be practical and reasonable, and accept that the World Anti-Doping
# h! m" R# Y2 }/ }# h1 Pagency (WADA) is competent at its job. Ye’s urine sample will be stored for
8 M+ H! w4 O3 ?2 N i1 S. E5 Meight years after the contest for future testing as technology advances.$ r- }: r" W% z& b% x
Innocent until proven guilty, shouldn’t it be?
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8 ~3 ~2 u w( f! a9 S; u0 F0 |7 ]. ]Sixth, and the last point I would like to make, is that the out-of-
" r& F! y6 M: z! B$ f0 Icompetition drug test is already in effect, which Callaway failed to mention6 v0 G/ K5 {# H3 X8 j7 l
. As noted in the president of WADA’s press release, drug testing for
/ k- r4 U2 s" v2 J, iOlympians began at least six months before the opening of the London
- \1 r" m" H/ Q: y/ aOlympics. Furthermore, 107 athletes have been banned from this Olympics for
4 b6 d' y9 C% g8 d/ _doping. That may be the reason that “everyone will pass at the Olympic5 T- U! `. x4 t" Z
games. Hardly anyone fails in competition testing” — those who did dope
$ |) B# ^% P% C( t8 u, d& w: t7 Xhave already been caught and sanctioned. Callaway is free to suggest that a: b) Y4 D0 Y' J( w, {. U) ]
player could have doped beforehand and fooled the test at the game, but this# u. E" {, i ~5 j
possibility is certainly ruled out for Ye.& ]# o- ^+ j4 `( V6 i: J
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Over all, even though Callaway did not falsify any data, he did (- `0 L7 x0 G; C0 `. W d- O6 `
intentionally or not) cherry-pick data that, in my view, are far too
7 ? @/ T' S: @2 \9 ssuggestive to be fair and unbiased. If you want to cover a story of a
6 ~: R" }" H- O% U0 U: vsuspected doping from a scientific point of view, be impartial and provide
8 b7 W) d; R: v/ _# Rall the facts for the reader to judge. You are entitled to your
5 a8 M1 i$ s+ m. Y7 uinterpretation of the facts, and the expression thereof in your piece,
/ p) D5 m% l+ Q( L1 D6 x$ _explicitly or otherwise, but showing only evidence that favours your
; G6 h; n+ S+ p' a' ^7 K Iargument is hardly good science or journalism. Such an article in a journal
* H( p# E$ K4 p# ]such as Nature is not an appropriate example of how scientific research or
3 d" E! v6 G; V* hreporting should be done. |
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