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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
* Y1 h V# o9 N6 L. W9 {* e8 x7 t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! X0 g6 F! O8 ^- w# O/ ^0 M
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
8 s5 Y% m+ I: {( ?1 V3 I1 ?
2 |3 F% A: n6 h* ~6 |; l% bIt is a shame to see Nature — which nearly all scientists, including myself
6 f5 i* v4 r) T. E$ p% q& N- A/ ?, regard as one of the most prestigious and influential physical-science
. k0 T) |/ ]' p7 ^magazines — publish a thinly veiled biased article like this. Granted, this, \1 a6 u, T G
is not a peer-reviewed scientific article and did not go through the2 T& ?( x k" F1 D! V, R2 T5 u
scrutiny of picking referees. But to serve as a channel for the general
7 m9 @! X! e0 Xpopulace to be in touch with and appreciate science, the authors and editors$ `9 d0 r) P3 F9 a
should at least present the readers with facts within the proper context,, j+ H7 I2 q" b: j" v0 q
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
# n$ l2 ? F8 j* COlympic 400-metre IM time with her performance at the World Championships in
8 J; `1 N# O: D4 @3 K+ }8 D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
0 J& y, u$ q; W# lanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous, \* _! ~5 o1 l' L8 ^" |& u
personal best was 4:33.79 at the Asian Games in 2010. This leads to an7 m( s) k5 j2 L
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
h! N: X2 v1 K! pdifference between the gold and silver medal, I see no reason for 5.38 s to& ~9 Z+ w, f! q, c9 q
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
' \* p: v; ~4 b. Estill developing. Bettering oneself by 5 seconds over two years may seem- X3 j; e* Q7 y4 A
impossible for an adult swimmer, but it certainly happens among youngsters.7 @1 N! y# E# I9 }1 k; W9 I9 {+ Z2 ]: h p
An interview with Australian gold medallist Ian Thorpe revealed that his 4006 v/ b& ]8 o+ h' K+ U9 z. p0 _
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
) [# c. C" h! i* l' k; a8 EFor regular people, including Callaway, it may be hard to imagine what an# y% W* O1 @3 t. U1 v
elite swimmer can achieve as he or she matures and undergoes scientific and. D9 ]3 z3 y, i" L# x% m+ d1 V9 D
persistent training. But jumping to the conclusion that it is “anomalous”
: ~; ~# z' Q4 L% pbased 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) U2 W( u, ]' D1 k
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
8 n' o2 C8 c& A' pthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 L' [; s L( v) |! @4 h' ?0 lhe chose not to push himself too hard and to conserve his energy for later
6 o# X6 M. o# V1 Ievents (whether this conforms to the Olympic spirit and the ‘use one’s* b7 I! G/ ^% h" B8 C W
best efforts to win a match’ requirement that the Badminton World! p; L( g6 `8 @. m; j$ H- q5 g
Federation recently invoked to disqualify four badminton pairs is another
7 I3 W0 j( x% }/ m* o7 W/ Ztopic worth discussing, though probably not in Nature). Ye, on the other2 Y% r2 p0 f: L5 S
hand, was trailing behind after the first 300 metres and relied on freestyle
9 ~! ?5 r$ s' t3 s2 W1 s/ M; U, in which she has an edge, to win the race. Failing to mention this
% N4 i! u' Z7 w: ustrategic difference, as well as the fact that Lochte is 23.25 seconds8 J. O' f0 p- s
faster (4:05.18) than Ye overall, creates the illusion that a woman swam# H4 P9 U/ |# y
faster than the best man in the same sport, which sounds impossible. Putting
8 w7 q' h% ^. g* e2 ~8 g# N) Kaside the gender argument, I believe this is still a leading question that% ~9 c+ O, K( O8 y7 K
implies to the reader that there is something fishy going on.0 ^5 G" R1 @$ z& F9 b" r! b8 Z
+ Z9 E/ q$ @& z) Z% u ^2 |Fourth is another example of cherry-picking. In the same event, there are
/ o9 a. Q8 T6 s. ~four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
( g# V, |6 k1 Z. us) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s# V3 i4 U5 n( f$ L" }" _
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
1 S- ]+ G9 e! [out, if we are just talking about the last 50 metres in a 400-metre IM,
$ d) B9 f' P5 z) l, D5 h. d7 |4 ?Lochter is not the example I would have used if I were the author. What kind9 t* X4 [& Y* k" c) N
of scientific rigorousness is Callaway trying to demonstrate here? Is it0 h( i8 Z, L; I3 V5 I' m
logical that if Lochter is the champion, we should assume that he leads in
. y8 [+ z1 e# a0 S, h1 n. s8 _every split? That would be a terrible way to teach the public how science
! s+ ~+ U! q' w* l9 T' y. s3 a, Oworks.) r0 A1 R8 L s
8 W5 |/ V! O) w: cFifth is the issue I oppose the most. Callaway quotes Ross Tucker and6 H% M! P' W$ \% @; d2 w8 _0 ]
implies that a drug test cannot rule out the possibility of doping. Is this
0 v) t: b6 l! ^- R5 Ckind of agnosticism what Nature really wants to teach its readers? By that
$ l0 ?/ X7 x0 V$ `standard, I estimate that at least half of the peer-reviewed scientific
+ j( l. Y. }5 O! ]- spapers in Nature should be retracted. How can one convince the editors and
5 e- R0 x6 g2 Z% G! H( u! ~9 u; Ureviewers that their proposed theory works for every possible case? One" |: i! S4 F4 ]9 V
cannot. One chooses to apply the theory to typical examples and to
: v- ]2 W' i u/ M0 }* s! ?demonstrate that in (hopefully) all scenarios considered, the theory works5 W8 D# s, O6 y' T% f/ z4 x N
to a degree, and that that should warrant publication until a counterexample d K# w2 c) U4 T
is found. I could imagine that Callaway has a sceptical mind, which is# e/ x0 A" k: Z: | M# D7 m
crucial to scientific thinking, but that would be put to better use if he
i# Z# S/ l; ~0 P$ w9 Ewrote a peer-reviewed paper that discussed the odds of Ye doping on a highly6 x8 [9 D2 Q+ i
advanced, non-detectable drug that the Chinese have come up with in the! q, g# D, @) B* i
past 4 years (they obviously did not have it in Beijing, otherwise why not
- k/ j) |. z* ~6 P" V- iuse it and woo the audience at home?), based on data and rational derivation; p, d7 q; A9 c+ l
. This article, however, can be interpreted as saying that all athletes are& j2 R# j/ I% ]' t
doping and the authorities are just not good enough to catch them. That may6 @1 Z. m- w6 r6 F3 n. k# c
be true, logically, but definitely will not make the case if there is ever a2 f7 b- T u8 [# f
hearing by the governing body for water sports, FINA, to determine if Ye* ?, G% E% T- E
has doped. To ask whether it is possible to obtain a false negative in a$ J8 a Z5 c- e# Q
drug test looks like a rigged question to me. Of course it is possible:+ O8 H! w0 P4 @( L8 `
other than the athlete taking a drug that the test is not designed to detect; r( ?5 i) k! B! @! H) F
, anyone who has taken quantum 101 will tell you that everything is+ K7 b5 R, k/ \5 l! C: `& T1 a
probabilistic in nature, and so there is a probability that the drug in an9 Y" \' J2 ~& D' [4 N
athlete’s system could tunnel out right at the moment of the test. A slight
$ U4 { U. q: E4 Z) l9 ychance it may be, but should we disregard all test results because of it?
: w$ ^; l i! r' T+ fLet’s be practical and reasonable, and accept that the World Anti-Doping
) k' c5 i: @7 y$ h% r& [: n3 L+ zagency (WADA) is competent at its job. Ye’s urine sample will be stored for
9 n. i: r# i. v: Ueight years after the contest for future testing as technology advances.
. Q% ?( I6 ?8 c: p. v/ R: u- @4 m! KInnocent until proven guilty, shouldn’t it be?: A+ e! i+ I G! q H
1 D/ v; V' h3 O. |! x, [* wSixth, and the last point I would like to make, is that the out-of-
+ x, D" J% ^) b" j( Z Bcompetition drug test is already in effect, which Callaway failed to mention
( D- ^! D; b' z2 f# ]* Y. As noted in the president of WADA’s press release, drug testing for
5 Z2 e) h+ V: e& D( W! a( |3 h! d4 fOlympians began at least six months before the opening of the London: b. j' A) ?8 d" U' a% Q7 F: B
Olympics. Furthermore, 107 athletes have been banned from this Olympics for( A6 V4 m2 V# \' \1 g. Q
doping. That may be the reason that “everyone will pass at the Olympic
1 l8 v& [; d4 J! j7 b5 M7 U egames. Hardly anyone fails in competition testing” — those who did dope
1 U5 \$ Z( M6 Y9 X- Z) L6 Ohave already been caught and sanctioned. Callaway is free to suggest that a5 I8 F# a) M7 p) b5 T
player could have doped beforehand and fooled the test at the game, but this
: h( U) y8 r, h ^! B9 \/ Rpossibility is certainly ruled out for Ye.+ R' W% ~/ x9 r1 M8 C% n+ O
, A- z' C3 U: V* g. ^9 [8 T4 QOver all, even though Callaway did not falsify any data, he did (* | X4 e; B, X' E- f4 d- _' {
intentionally or not) cherry-pick data that, in my view, are far too
5 h4 Y" k5 }" b* o! p1 N1 I/ gsuggestive to be fair and unbiased. If you want to cover a story of a
0 u2 _1 f) L$ h: h4 G1 ^suspected doping from a scientific point of view, be impartial and provide' C' c" K; i+ c
all the facts for the reader to judge. You are entitled to your+ ~1 _6 a/ p1 D6 F
interpretation of the facts, and the expression thereof in your piece,
, w( |' P+ `5 l+ ~& Q- |explicitly or otherwise, but showing only evidence that favours your
, Q# V/ G* ~7 G" K; Jargument is hardly good science or journalism. Such an article in a journal
: x" B( K4 m1 S! asuch as Nature is not an appropriate example of how scientific research or
% V5 [, v, P0 e% _reporting should be done. |
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