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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+ p! x( q* a* Q8 V& q @
如果是中国长大的,英语能到这种程度真是很不简单。/ d3 ~( q, H& O) G* Q7 t% b
3 c6 Q% i7 x- T; Y, [: Z* ~http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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: j$ g; c. m3 v/ y4 r/ BIt is a shame to see Nature — which nearly all scientists, including myself
; z3 r4 B7 a- {& L, `& t* O, regard as one of the most prestigious and influential physical-science
4 s# Q+ B. r% ^4 N6 Z7 U7 amagazines — publish a thinly veiled biased article like this. Granted, this
M& S( U& Z5 D; \+ H8 B9 eis not a peer-reviewed scientific article and did not go through the
6 C$ }; N: T/ t1 J- ]2 U& B) |scrutiny of picking referees. But to serve as a channel for the general+ n; b$ ]0 ?/ B* I5 K. K% Z
populace to be in touch with and appreciate science, the authors and editors
6 K5 I, I9 [2 Q# y$ Kshould at least present the readers with facts within the proper context,
D/ ~0 [- F! x1 n0 xwhich they blatantly failed to do.( A7 U# ~* {0 a. m
7 o- j) j, Y! }3 x) ]First, to identify Ye’s performance increase, Ewen Callaway compared her: A! w+ U q8 Z/ q5 |
Olympic 400-metre IM time with her performance at the World Championships in
/ B* |8 T4 H5 K2 i2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “4 x5 \9 Y: m8 |0 X; j; ?
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous8 \" ^# z' }( r& t1 Q, A
personal best was 4:33.79 at the Asian Games in 2010. This leads to an- B4 d) R! t, y2 U s. j
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the- [! z' V5 j( I/ A1 I
difference between the gold and silver medal, I see no reason for 5.38 s to
. ~, X: ^9 a, {% d( Ibe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
) v9 w& {: o2 H' _* E5 n0 K/ Gstill developing. Bettering oneself by 5 seconds over two years may seem
0 b8 c0 t+ A' V4 z) F# h/ o3 j- a9 Uimpossible for an adult swimmer, but it certainly happens among youngsters.3 y6 c, j3 t! c- d! V1 S
An interview with Australian gold medallist Ian Thorpe revealed that his 400
+ B9 {& [; R4 \5 y" A/ c-metre freestyle time improved by 5 seconds between the ages of 15 and 16.- Y$ Y6 `& H$ p3 w/ v% y7 R( u
For regular people, including Callaway, it may be hard to imagine what an2 z) H5 D9 m: e: q1 t
elite swimmer can achieve as he or she matures and undergoes scientific and! M+ h. P0 N: j d% a3 u8 I& `
persistent training. But jumping to the conclusion that it is “anomalous”
s- A. f {7 F0 ?* D R4 p8 g) I) ?based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.# r1 c4 T" @% R5 u" ~# v
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
5 E) @: [* h4 \5 [. eexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in/ k, g8 X6 H3 y6 |
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so: c: y8 v/ t0 u' E2 j
he chose not to push himself too hard and to conserve his energy for later3 \ v0 c- L& D0 W+ R
events (whether this conforms to the Olympic spirit and the ‘use one’s3 E8 T7 x: Y- @% U I+ A
best efforts to win a match’ requirement that the Badminton World* a( D7 u4 |, {# V% {4 M% e, t
Federation recently invoked to disqualify four badminton pairs is another
7 ^ J4 r+ m1 O( Htopic worth discussing, though probably not in Nature). Ye, on the other! b. [" G8 @" n7 } Q
hand, was trailing behind after the first 300 metres and relied on freestyle
8 K, n3 [) |& J4 [' L, in which she has an edge, to win the race. Failing to mention this
; l% A0 f z4 g. x5 Istrategic difference, as well as the fact that Lochte is 23.25 seconds$ D- ~ q9 d2 Z7 V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam U+ } I% [9 o+ `
faster than the best man in the same sport, which sounds impossible. Putting
# ~# u( @2 V7 Naside the gender argument, I believe this is still a leading question that
9 r% B8 h8 k! m: Y9 N0 \% Simplies to the reader that there is something fishy going on.3 v G. `+ p' M$ {1 ~! n
( O8 M1 S' |$ `9 |- d. l6 ?- C' M+ |Fourth is another example of cherry-picking. In the same event, there are
3 ^1 a) ]% P# J9 e( l- {four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.938 S$ v" ~) [2 m0 x9 Y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
" M3 x3 j4 P, @3 K) ~. }/ _) X), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
( ?6 \9 v4 ]9 z" D1 A; H' H. m6 [out, if we are just talking about the last 50 metres in a 400-metre IM,
( E4 K# Z4 A5 |* C2 l% M) p- eLochter is not the example I would have used if I were the author. What kind' u/ o) y: }! U# f5 v$ y, _
of scientific rigorousness is Callaway trying to demonstrate here? Is it6 j" J$ b, m7 \8 s& ]) [8 d& U
logical that if Lochter is the champion, we should assume that he leads in+ D0 U5 }6 i7 u$ |7 |3 K0 F7 H0 o
every split? That would be a terrible way to teach the public how science
4 R4 x+ u, w& a% R1 xworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and) }' P, K6 v9 l4 Y4 e
implies that a drug test cannot rule out the possibility of doping. Is this
: G9 I1 s6 L. U8 c" S. Ikind of agnosticism what Nature really wants to teach its readers? By that+ K& y+ |4 {9 w6 K
standard, I estimate that at least half of the peer-reviewed scientific6 U3 A' N/ G% q. X; `& \
papers in Nature should be retracted. How can one convince the editors and
1 E8 D/ ]( o6 Q0 a6 Breviewers that their proposed theory works for every possible case? One2 K1 s/ h; B4 y' Z9 E
cannot. One chooses to apply the theory to typical examples and to& x7 q% }; L2 b7 H2 ^# @( H- l e
demonstrate that in (hopefully) all scenarios considered, the theory works
* R4 `; B3 t X; s' f, p Lto a degree, and that that should warrant publication until a counterexample
% p- K7 Y; H _9 }. R* ]2 pis found. I could imagine that Callaway has a sceptical mind, which is
$ }0 B3 d( T2 |! E8 Zcrucial to scientific thinking, but that would be put to better use if he# |& `/ y* R3 {5 A6 t# u
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
2 V F4 R. r. q$ C+ Uadvanced, non-detectable drug that the Chinese have come up with in the3 D% `3 N/ J1 w! U" {% Q
past 4 years (they obviously did not have it in Beijing, otherwise why not# p+ q2 P2 b* O. A, [* _0 s& X
use it and woo the audience at home?), based on data and rational derivation: U. d" p: D5 J# E
. This article, however, can be interpreted as saying that all athletes are
. B# G. d9 Z* S7 @* Kdoping and the authorities are just not good enough to catch them. That may& k2 M7 h5 u4 `: o; s& P; C
be true, logically, but definitely will not make the case if there is ever a7 s* B. Q- V. d" ~
hearing by the governing body for water sports, FINA, to determine if Ye
% l1 }1 _% a- \: t$ `& \has doped. To ask whether it is possible to obtain a false negative in a9 t' u) k s/ L2 N3 C- g
drug test looks like a rigged question to me. Of course it is possible:/ h; A. a8 v$ {) O' B% F* ]
other than the athlete taking a drug that the test is not designed to detect( Q( w5 f: G2 f) c7 c* l
, anyone who has taken quantum 101 will tell you that everything is
/ H2 {' o r4 Z0 Tprobabilistic in nature, and so there is a probability that the drug in an
2 k/ r' }4 w1 o3 k/ @$ N5 E- j5 qathlete’s system could tunnel out right at the moment of the test. A slight
4 S/ u' p6 W: C) t* ^chance it may be, but should we disregard all test results because of it?0 K8 D; ^/ J( D V
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 |# Z# c: f' F* D. @% v# ?agency (WADA) is competent at its job. Ye’s urine sample will be stored for
9 w1 x9 b1 ? }0 E: E5 c4 ?eight years after the contest for future testing as technology advances.
/ @8 T: t) g7 p( cInnocent 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-/ [% f5 E8 w( c- k0 I1 C E* @
competition drug test is already in effect, which Callaway failed to mention6 K4 `7 o2 y) ^2 p; L" w
. As noted in the president of WADA’s press release, drug testing for
$ @4 a. z4 ~4 @5 k# c3 mOlympians began at least six months before the opening of the London
2 N; n% c5 [2 U, H# D" \$ k* z# eOlympics. Furthermore, 107 athletes have been banned from this Olympics for3 K9 }. F6 W$ c l
doping. That may be the reason that “everyone will pass at the Olympic
8 u8 k; w) v8 Xgames. Hardly anyone fails in competition testing” — those who did dope9 U$ y5 o/ s6 x, ?$ \) a9 f# X
have already been caught and sanctioned. Callaway is free to suggest that a6 s# P! y& v" ~( b6 e
player could have doped beforehand and fooled the test at the game, but this
0 g/ n& G+ z2 R1 t& ~possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
) b$ G& ]4 ~/ B) B: Q5 V( C' Xintentionally or not) cherry-pick data that, in my view, are far too3 H6 F% d; @+ E2 v8 r
suggestive to be fair and unbiased. If you want to cover a story of a; B( Q; Z! O6 X
suspected doping from a scientific point of view, be impartial and provide- T+ t/ C! `% ^, m: M9 J( W: v
all the facts for the reader to judge. You are entitled to your8 `3 F7 k) A2 O4 u6 z
interpretation of the facts, and the expression thereof in your piece,
# c6 `' U3 b8 c Oexplicitly or otherwise, but showing only evidence that favours your
5 s3 l; S* f2 C; r% uargument is hardly good science or journalism. Such an article in a journal
5 t7 q; t6 K$ d) m1 p0 A3 C6 Jsuch as Nature is not an appropriate example of how scientific research or
$ R6 Z0 F V( C) u, yreporting should be done. |
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