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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, A7 _: c) X( V
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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0 u* F% O) H. c; {http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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8 A X4 g) E; {$ T' OFROM LAI JIANG, Department of Chemistry, University of Pennsylvania, h6 D7 o/ N! Z! C
8 d% F4 g8 |+ p2 _It is a shame to see Nature — which nearly all scientists, including myself
+ x3 C3 q& ?: w( k, regard as one of the most prestigious and influential physical-science2 j# N8 C. R. P
magazines — publish a thinly veiled biased article like this. Granted, this% I& R- N5 Z" [3 W2 G" b
is not a peer-reviewed scientific article and did not go through the& M7 t" U$ O' F# O2 N, h) r
scrutiny of picking referees. But to serve as a channel for the general
g" u) C4 V2 w* cpopulace to be in touch with and appreciate science, the authors and editors
' M9 C' ]7 W$ D6 Q; pshould at least present the readers with facts within the proper context,- @, p% p8 B1 U( ^, m# q
which they blatantly failed to do.5 L B/ b5 Y6 ] i, x
, ?) o, L& j2 R* `% YFirst, to identify Ye’s performance increase, Ewen Callaway compared her3 p! @6 O. [+ f, L
Olympic 400-metre IM time with her performance at the World Championships in! f, r: R4 r/ R4 I5 f- u
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “- R) j" {5 X$ f8 F2 ?( E6 k
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
$ e7 }0 m: V0 l% _3 I, [ fpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
' r( V. q6 R- c. eimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
3 [7 {3 k2 E+ `difference between the gold and silver medal, I see no reason for 5.38 s to
1 W. ?" x! c1 n1 x3 {+ j. _% u0 ebe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is! G2 i3 b4 V/ x3 Z0 Q V. Y% x
still developing. Bettering oneself by 5 seconds over two years may seem
8 z$ s* a' } f) X2 Zimpossible for an adult swimmer, but it certainly happens among youngsters.. J( i- K r2 G9 F+ @" `
An interview with Australian gold medallist Ian Thorpe revealed that his 400
3 L- g+ {8 W B( ~) _, T8 F; `9 Z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.% H ]6 c1 ?5 ]9 O, r% Z
For regular people, including Callaway, it may be hard to imagine what an! Z& H5 K9 l8 w
elite swimmer can achieve as he or she matures and undergoes scientific and) Q6 t3 B6 N0 }$ F6 d
persistent training. But jumping to the conclusion that it is “anomalous”
% o& I) w! o3 n0 ^% Lbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.5 f( e+ h* }: w* F
9 X* R$ C& Q& _$ R' S/ l3 t) gThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 _" S1 g% l0 I* q- ]
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in! q+ d7 w0 L" S9 x
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
8 ~. @" k( M0 h$ u7 a+ vhe chose not to push himself too hard and to conserve his energy for later+ K7 y! Y5 V* k* c8 u3 w% k# `4 e" O
events (whether this conforms to the Olympic spirit and the ‘use one’s6 E2 Y$ Q2 z/ t" `( q9 H6 f
best efforts to win a match’ requirement that the Badminton World1 m' }5 {! _. I; G
Federation recently invoked to disqualify four badminton pairs is another
W" f1 s5 U Z3 `5 T" i2 Htopic worth discussing, though probably not in Nature). Ye, on the other
8 @+ o6 U3 a" ?2 o4 shand, was trailing behind after the first 300 metres and relied on freestyle
: j" [. u( @) S$ i6 _, h' {, in which she has an edge, to win the race. Failing to mention this3 r! E N, e" b' h8 r/ c4 T& ]" U
strategic difference, as well as the fact that Lochte is 23.25 seconds0 c& J7 A1 m8 [ s" ~- k1 o* R; O
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
! f6 Z6 |+ [# R7 Pfaster than the best man in the same sport, which sounds impossible. Putting0 V3 }9 c0 f* ^/ m
aside the gender argument, I believe this is still a leading question that5 @% _( r( P0 z% L+ E1 ~
implies to the reader that there is something fishy going on.# B l$ m) J/ ~. ~+ V& P( C7 |
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Fourth is another example of cherry-picking. In the same event, there are/ g: t0 i" L8 o
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93( g; h0 j+ B$ G+ S1 m- k9 F8 L
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s/ C# x) U5 ?- H) j
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns8 j- R+ q# F6 Q1 \* [ A N, E) N
out, if we are just talking about the last 50 metres in a 400-metre IM,; m, y) G7 n0 Q$ O
Lochter is not the example I would have used if I were the author. What kind
- B/ X4 a8 L0 Q: xof scientific rigorousness is Callaway trying to demonstrate here? Is it, f5 r4 J* E! C8 n
logical that if Lochter is the champion, we should assume that he leads in
! @1 i. K, }; w+ U* y2 Qevery split? That would be a terrible way to teach the public how science* Z. `) t6 {+ A* b9 X! Z' E
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and: W) q. v& l- U! t5 s8 K( @
implies that a drug test cannot rule out the possibility of doping. Is this$ i4 N6 }2 W; K+ w0 D, U B0 k! v) B2 X5 C
kind of agnosticism what Nature really wants to teach its readers? By that
8 N% R) k& A0 ^% Z" X9 V' ?standard, I estimate that at least half of the peer-reviewed scientific
6 p) R2 W! z( x3 d; n4 j% a1 N, B0 rpapers in Nature should be retracted. How can one convince the editors and
/ {. J4 ]0 S$ c% b% ^% R2 a }- nreviewers that their proposed theory works for every possible case? One
# k( g3 t- l" }! w, |" xcannot. One chooses to apply the theory to typical examples and to
/ f4 Z7 V) T+ P: q* b# k4 i# Pdemonstrate that in (hopefully) all scenarios considered, the theory works
) l- U" B$ R, J7 X! B2 _2 `7 d+ Sto a degree, and that that should warrant publication until a counterexample
. n, h- V; }( }5 k: lis found. I could imagine that Callaway has a sceptical mind, which is
& v1 m- F& c( C \% Ccrucial to scientific thinking, but that would be put to better use if he
, Y- k9 t* R' Cwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly4 f1 r) c$ C$ L- j
advanced, non-detectable drug that the Chinese have come up with in the" l4 v' R; G6 e/ Y
past 4 years (they obviously did not have it in Beijing, otherwise why not' c' O v& K' o9 @
use it and woo the audience at home?), based on data and rational derivation
7 ^1 j1 `% @/ x. This article, however, can be interpreted as saying that all athletes are
# L+ F8 ]3 T% ]5 [0 v8 y) } sdoping and the authorities are just not good enough to catch them. That may
- m! n! V& s" G5 L9 wbe true, logically, but definitely will not make the case if there is ever a! i3 i0 j1 I6 l8 A' z
hearing by the governing body for water sports, FINA, to determine if Ye
- b9 I0 z1 e! M2 H1 X1 bhas doped. To ask whether it is possible to obtain a false negative in a
+ @) ^' ~- }2 o7 X/ [0 G$ {drug test looks like a rigged question to me. Of course it is possible:
4 j9 ~8 Z- ^* E9 z( J) hother than the athlete taking a drug that the test is not designed to detect' s2 _, ^$ e: y- {
, anyone who has taken quantum 101 will tell you that everything is" l$ h" T* _# R( U1 j' B
probabilistic in nature, and so there is a probability that the drug in an% u! `2 s; P. i7 I3 J ]
athlete’s system could tunnel out right at the moment of the test. A slight
( K$ U" e$ x. j; x( `4 mchance it may be, but should we disregard all test results because of it?
+ a, H% `: \- |% k) B- jLet’s be practical and reasonable, and accept that the World Anti-Doping$ K/ A, M% e: J: e1 E
agency (WADA) is competent at its job. Ye’s urine sample will be stored for2 o# Y' z, f3 E
eight years after the contest for future testing as technology advances.8 r: |$ C$ \: X( Y: b
Innocent until proven guilty, shouldn’t it be? U5 Z( i7 U, f4 A4 }. r/ _) O
8 Q' |! C8 J( @7 p( ~( ?7 @Sixth, and the last point I would like to make, is that the out-of-
" c* J/ F9 [" S% S4 vcompetition drug test is already in effect, which Callaway failed to mention
z5 K5 x2 e# t* V- `. @: M& J. As noted in the president of WADA’s press release, drug testing for
6 `# H: K' T- y% F/ ?7 z" MOlympians began at least six months before the opening of the London
. v- }1 o) d9 O3 h: lOlympics. Furthermore, 107 athletes have been banned from this Olympics for" T9 l7 K4 w% c/ i* |
doping. That may be the reason that “everyone will pass at the Olympic
. B. Z% q' N' ^+ }3 O) W( D( c, Ogames. Hardly anyone fails in competition testing” — those who did dope
4 W8 }( d7 R( I: f7 n- y+ u) v; B4 Fhave already been caught and sanctioned. Callaway is free to suggest that a
' O; z2 X! L& R0 u) d3 V3 pplayer could have doped beforehand and fooled the test at the game, but this
% P& t7 j. z" @6 o3 C+ n* P0 lpossibility is certainly ruled out for Ye.3 c3 J! k+ D( U+ d& L+ S
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Over all, even though Callaway did not falsify any data, he did (
. C5 o2 s- M7 q0 [3 {. ]intentionally or not) cherry-pick data that, in my view, are far too$ X8 W, C7 F8 h8 F2 X" a! ~
suggestive to be fair and unbiased. If you want to cover a story of a$ D$ r6 o8 R1 Y0 z( t: G5 V
suspected doping from a scientific point of view, be impartial and provide/ R- G8 {* L, P* ]5 q% v1 c; u
all the facts for the reader to judge. You are entitled to your/ B/ ?7 f3 ]; c& l! `
interpretation of the facts, and the expression thereof in your piece,1 w6 [ [6 y) Y; o& o/ J' y
explicitly or otherwise, but showing only evidence that favours your
9 Z% A2 G: _4 e! @& k/ \argument is hardly good science or journalism. Such an article in a journal1 R5 g* M! Q2 G: Z! G/ L1 j! ^
such as Nature is not an appropriate example of how scientific research or0 \2 c* P6 I! o8 Y
reporting should be done. |
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