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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
; ~9 y+ s& b$ O# Q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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html' U% S/ I* Y) w' K1 O8 e
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania2 b+ I8 l/ W7 k, P+ J* U
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It is a shame to see Nature — which nearly all scientists, including myself
0 R* t5 J/ E# Q/ {% a) E, regard as one of the most prestigious and influential physical-science+ z/ l: T- S8 b: |
magazines — publish a thinly veiled biased article like this. Granted, this4 v5 \: R6 S% l* |; `; o: |& F
is not a peer-reviewed scientific article and did not go through the9 d5 r5 [: y' K1 ?, H
scrutiny of picking referees. But to serve as a channel for the general4 z. ?4 Y& B9 {' r5 X Q B" \( h( m; V
populace to be in touch with and appreciate science, the authors and editors# F# j% j" z; k1 T
should at least present the readers with facts within the proper context,
% s3 R a! \8 `2 Zwhich they blatantly failed to do.# K2 }5 r" K4 r2 Q, S
$ u' R9 p: Y, ?; QFirst, to identify Ye’s performance increase, Ewen Callaway compared her a% p5 Q2 l4 u2 j6 V
Olympic 400-metre IM time with her performance at the World Championships in
) n( ~% x# A0 N4 W2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% G: E( M9 w3 {3 nanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- S- k$ V! R& C2 Xpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
Q) G/ F Z* [4 uimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
4 A" n0 ]0 s% H$ ydifference between the gold and silver medal, I see no reason for 5.38 s to% e7 K7 N4 k( s. y
be treated as 7 s.* O- P1 o! C6 k
7 h! W" D0 p3 l$ L3 G9 b2 v1 Q* N
Second, as previously pointed out, Ye is only 16 years old and her body is
: j* C5 @ J1 V2 r7 \8 g, ^/ c2 _+ ystill developing. Bettering oneself by 5 seconds over two years may seem
9 e' l$ c. j# W; a, @# Q9 Fimpossible for an adult swimmer, but it certainly happens among youngsters.; n! }. }# c& N, t7 c
An interview with Australian gold medallist Ian Thorpe revealed that his 400
- h$ e2 M# I1 f+ x( b; u-metre freestyle time improved by 5 seconds between the ages of 15 and 16.. v+ T- z3 E2 S
For regular people, including Callaway, it may be hard to imagine what an/ T$ N5 q' V' X' [3 l# A
elite swimmer can achieve as he or she matures and undergoes scientific and5 R m9 b% `0 U+ M/ P5 \3 H/ q
persistent training. But jumping to the conclusion that it is “anomalous”
7 n$ Y% ~* M* w, p: X2 y0 p6 qbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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; D3 i8 f1 k# @9 i( t1 L- M# c& lThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
; ^! F/ o2 p2 ]/ W& K1 R6 Fexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in. C2 H+ B' }" Q" o$ t$ c! p, y& d
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so7 k- B, ^+ x* _& a5 T
he chose not to push himself too hard and to conserve his energy for later
; u1 _& X% t0 X7 S L4 }( `events (whether this conforms to the Olympic spirit and the ‘use one’s
# w" ?- _6 i9 M l0 Rbest efforts to win a match’ requirement that the Badminton World
/ y" |. V! f9 K+ k0 kFederation recently invoked to disqualify four badminton pairs is another- H8 X# ? l) j3 `( b( R4 n
topic worth discussing, though probably not in Nature). Ye, on the other# C5 i) ]" Y1 E `
hand, was trailing behind after the first 300 metres and relied on freestyle
' B. V; E2 G ]( F, in which she has an edge, to win the race. Failing to mention this
1 s8 w- W; Y5 ?3 }3 o; dstrategic difference, as well as the fact that Lochte is 23.25 seconds
$ r8 {0 ~% o) o; o! k) A. [6 wfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 i+ y5 ^# N! T3 S! y! x* Q9 Hfaster than the best man in the same sport, which sounds impossible. Putting0 K h1 q* j, B7 X& x0 M. U j
aside the gender argument, I believe this is still a leading question that
( S: n5 D; c6 n5 J3 V& E3 Simplies to the reader that there is something fishy going on.
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|$ ^# h* Z, ^7 z8 S3 \& _Fourth is another example of cherry-picking. In the same event, there are, ]2 }! p& U1 a( b* [2 L
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
. O& ?" Y1 |* [$ i! H" }s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
$ y. k; c1 r5 O( Z8 ~), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
' U4 ?+ T8 b) rout, if we are just talking about the last 50 metres in a 400-metre IM,6 Z/ x7 v% ?. Z; \! c' ^# m1 s
Lochter is not the example I would have used if I were the author. What kind7 \3 t( B: S' v* `3 {7 K
of scientific rigorousness is Callaway trying to demonstrate here? Is it
% m+ g' v1 {6 g. h) hlogical that if Lochter is the champion, we should assume that he leads in
% X0 Q. \! d' T3 p* {) E$ \$ E$ jevery split? That would be a terrible way to teach the public how science% K+ q$ m, [& q- K$ m* O
works.
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8 ^' a6 J' L9 c' A4 lFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
0 b" ], q9 N% D( Z8 Q0 yimplies that a drug test cannot rule out the possibility of doping. Is this0 p- n( Z4 U; }+ G7 E/ w# V0 J
kind of agnosticism what Nature really wants to teach its readers? By that
( `- I# F* s5 w6 V3 lstandard, I estimate that at least half of the peer-reviewed scientific0 A0 L/ J) r7 q9 s. Q; M
papers in Nature should be retracted. How can one convince the editors and! j% O* A# Y6 d& b' X9 L: X
reviewers that their proposed theory works for every possible case? One
2 f! _* @+ h' l8 F4 J5 l% D& \cannot. One chooses to apply the theory to typical examples and to
3 Y$ a) ]+ y* zdemonstrate that in (hopefully) all scenarios considered, the theory works# }. ~( A% t$ p q5 A+ ~% u
to a degree, and that that should warrant publication until a counterexample
) T- {7 B6 Y" \! ]1 {3 wis found. I could imagine that Callaway has a sceptical mind, which is' L# r7 {: z' |, D( f
crucial to scientific thinking, but that would be put to better use if he* o: d: {/ y. z+ E
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly0 I) N5 j" h" i3 N8 i; R
advanced, non-detectable drug that the Chinese have come up with in the% h& I3 o( l5 y+ o4 u
past 4 years (they obviously did not have it in Beijing, otherwise why not
' i$ f& f" @" N8 Guse it and woo the audience at home?), based on data and rational derivation
" X8 i' @7 a1 {/ }- Q9 J7 f. This article, however, can be interpreted as saying that all athletes are; w$ E$ `4 I5 B' y
doping and the authorities are just not good enough to catch them. That may9 S6 @$ W* ?& }* P% n0 O, j
be true, logically, but definitely will not make the case if there is ever a; w! U" A4 N7 h# c. m0 j# z. ]" B
hearing by the governing body for water sports, FINA, to determine if Ye# d- c5 n# o1 _7 c
has doped. To ask whether it is possible to obtain a false negative in a) \$ @8 Q* w; U
drug test looks like a rigged question to me. Of course it is possible:. o* [/ X! _& a. s" e
other than the athlete taking a drug that the test is not designed to detect- l7 [; e7 A! s" q7 i+ ]/ v
, anyone who has taken quantum 101 will tell you that everything is
9 T5 j) c ?4 Rprobabilistic in nature, and so there is a probability that the drug in an8 |/ Y' _0 z. E8 R5 e3 r2 ]! j
athlete’s system could tunnel out right at the moment of the test. A slight/ l4 V; F& c: ]# _( q9 x6 m7 `
chance it may be, but should we disregard all test results because of it?6 J7 Z( _5 C. [! U# U3 K8 h
Let’s be practical and reasonable, and accept that the World Anti-Doping
' I& I$ R, }3 d4 _" J: k! u5 T7 Yagency (WADA) is competent at its job. Ye’s urine sample will be stored for& g+ J6 s/ W5 t# }' g
eight years after the contest for future testing as technology advances.
: i8 i' i) v- ^- q" j9 g6 d! F8 A" y! MInnocent until proven guilty, shouldn’t it be?
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& j/ C: [) Y/ `5 R( E9 \& BSixth, and the last point I would like to make, is that the out-of-4 y z& J' f0 F! z }% U; V# {
competition drug test is already in effect, which Callaway failed to mention; L, Z r/ K3 q0 p% H
. As noted in the president of WADA’s press release, drug testing for5 N4 y/ Q `% A
Olympians began at least six months before the opening of the London8 L, \+ o, V6 X; M* i9 L
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
9 B9 K) z. d* ~8 {& L: Ydoping. That may be the reason that “everyone will pass at the Olympic
0 U1 F* V1 m3 zgames. Hardly anyone fails in competition testing” — those who did dope+ L) t$ U4 T6 b! m8 p0 w
have already been caught and sanctioned. Callaway is free to suggest that a6 l6 N/ x; H8 T
player could have doped beforehand and fooled the test at the game, but this
+ o% V4 g) B. z5 z9 y6 K+ Q: S% spossibility is certainly ruled out for Ye.
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8 c- @8 m) l& kOver all, even though Callaway did not falsify any data, he did (5 q: N; p% ]: @* Q
intentionally or not) cherry-pick data that, in my view, are far too% t) J- i* x9 O0 r) ^8 w
suggestive to be fair and unbiased. If you want to cover a story of a
: m4 A! Y, I% vsuspected doping from a scientific point of view, be impartial and provide
. W8 V4 J$ T5 t4 iall the facts for the reader to judge. You are entitled to your4 ^3 p$ W' l) L
interpretation of the facts, and the expression thereof in your piece,1 ^8 h' e H" k
explicitly or otherwise, but showing only evidence that favours your
; q3 w9 x) P9 v" r- [, Z! t; U) ?argument is hardly good science or journalism. Such an article in a journal
& D( [" n! G- {% n& [such as Nature is not an appropriate example of how scientific research or! G, v) g- ]0 d+ e1 V6 @, J5 _+ [0 Q
reporting should be done. |
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