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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 t$ k* `" _* B5 j
如果是中国长大的,英语能到这种程度真是很不简单。; F" y6 C7 f/ J
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html; H6 d+ t; @" o/ b
& j( l* |9 l+ y9 i4 I7 S: bFROM LAI JIANG, Department of Chemistry, University of Pennsylvania6 D) M. K/ B8 K' e
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It is a shame to see Nature — which nearly all scientists, including myself
) x# f V! F: m" r2 P/ i, regard as one of the most prestigious and influential physical-science
( K" |; C! i3 s gmagazines — publish a thinly veiled biased article like this. Granted, this7 s( F' t- @% ^# m+ y
is not a peer-reviewed scientific article and did not go through the
9 E4 a$ Q8 |5 h& zscrutiny of picking referees. But to serve as a channel for the general1 ^# L& k+ V- B( l7 q0 |
populace to be in touch with and appreciate science, the authors and editors
3 ~+ W: B1 v1 Bshould at least present the readers with facts within the proper context,9 _+ R" d8 k& F$ u6 i+ u
which they blatantly failed to do.* l j7 k7 i' c
1 D% o/ m, a4 c9 |3 x, g1 m. w. A$ PFirst, to identify Ye’s performance increase, Ewen Callaway compared her$ B: \7 R0 t \
Olympic 400-metre IM time with her performance at the World Championships in" I8 ]: l) @+ W7 t4 R; k
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
9 X# G0 y K# Q/ v# fanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
3 x8 a7 U/ Y4 J2 d# J# Qpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an' y% z6 K- m5 b7 z
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
F( `! U# s5 a& H1 Ydifference between the gold and silver medal, I see no reason for 5.38 s to
0 h/ d4 c' p x7 w! fbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
9 U& [9 ]: N! O/ Dstill developing. Bettering oneself by 5 seconds over two years may seem! w! W2 t+ r$ R3 R/ X' h! C+ _: m2 L
impossible for an adult swimmer, but it certainly happens among youngsters.
$ ~/ X( T8 O7 Z" lAn interview with Australian gold medallist Ian Thorpe revealed that his 400
% l; f. O+ {/ I5 z-metre freestyle time improved by 5 seconds between the ages of 15 and 16.9 R! \0 J; ~: Y" P* F
For regular people, including Callaway, it may be hard to imagine what an3 B) I5 E& b. u, u7 l Y
elite swimmer can achieve as he or she matures and undergoes scientific and) ^. d( @! `$ E+ }4 f; z9 h, t/ ^
persistent training. But jumping to the conclusion that it is “anomalous”
; G/ ^& m; ~8 m' ?based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.6 c2 m$ g+ F' g, i1 S9 @9 }! d; c
) f V# D" X; h9 a. w; e7 P1 YThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 V. U: g# B3 ~( L( u |8 i
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in. y( F8 B. [# N
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so0 u, x% D) F4 c
he chose not to push himself too hard and to conserve his energy for later% c' E' X9 \; y$ j0 J
events (whether this conforms to the Olympic spirit and the ‘use one’s! e$ o. O% o; L5 B) |, R
best efforts to win a match’ requirement that the Badminton World
& a" Y4 [0 W6 g1 YFederation recently invoked to disqualify four badminton pairs is another. K# ?, {9 z; S) X
topic worth discussing, though probably not in Nature). Ye, on the other+ F* Y$ x; a0 @- T* |( W
hand, was trailing behind after the first 300 metres and relied on freestyle
! W5 ^" M J4 X1 z, in which she has an edge, to win the race. Failing to mention this3 p1 R- h( g8 x0 {7 i& \
strategic difference, as well as the fact that Lochte is 23.25 seconds1 f9 Z8 y' q6 m n, L8 {
faster (4:05.18) than Ye overall, creates the illusion that a woman swam, |4 C4 @! b" C( J9 D$ [
faster than the best man in the same sport, which sounds impossible. Putting/ f L c, n& ], I4 k; q
aside the gender argument, I believe this is still a leading question that3 d, e4 j) G- E4 Q
implies to the reader that there is something fishy going on., @0 F8 g1 {+ L4 ^
( v8 L% P9 G5 P3 d6 QFourth is another example of cherry-picking. In the same event, there are
" ^3 J: y5 I/ H P* ]# pfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.938 h( v1 \; p! S) y( f5 \$ e
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s# t1 _( w: y9 @% h$ L5 h5 k
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns6 V. d: f; }* |4 T7 [/ L1 G2 {
out, if we are just talking about the last 50 metres in a 400-metre IM,
) C# X7 o8 ?7 s% F. z4 b( b) _Lochter is not the example I would have used if I were the author. What kind' E- ?5 G( d9 P, C% l1 T
of scientific rigorousness is Callaway trying to demonstrate here? Is it' u3 J; [) D. b! l
logical that if Lochter is the champion, we should assume that he leads in
+ m! f& ]4 g, h! ^2 u" ^1 c/ h: Yevery split? That would be a terrible way to teach the public how science
3 Q0 |: P0 t4 n2 Zworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
) J! H2 Z0 p9 [implies that a drug test cannot rule out the possibility of doping. Is this: a8 D3 A) q* J8 e0 N1 [
kind of agnosticism what Nature really wants to teach its readers? By that
& q% n* ^0 O- b6 m! q) jstandard, I estimate that at least half of the peer-reviewed scientific
) v2 s1 g4 Z- i+ y2 @papers in Nature should be retracted. How can one convince the editors and
2 f9 z9 m$ K. P" l5 b8 c9 z8 mreviewers that their proposed theory works for every possible case? One
# L& L0 o1 u! S3 I3 h9 t m2 Ycannot. One chooses to apply the theory to typical examples and to
D) c; @* u2 Tdemonstrate that in (hopefully) all scenarios considered, the theory works
) `/ x" G& w2 p1 Zto a degree, and that that should warrant publication until a counterexample& f0 C% k) k, X1 u* p: |
is found. I could imagine that Callaway has a sceptical mind, which is8 n4 Q6 N( d' c' |
crucial to scientific thinking, but that would be put to better use if he
9 [' ?3 I. a! i7 _wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly. k B: h1 ~. e* w9 R0 f" O
advanced, non-detectable drug that the Chinese have come up with in the
0 x! t' A; |7 `( |* {& v0 ]past 4 years (they obviously did not have it in Beijing, otherwise why not, o; c3 v# o, ]
use it and woo the audience at home?), based on data and rational derivation* S- e) ]( e" C! l2 \
. This article, however, can be interpreted as saying that all athletes are' f( i0 J* T4 Z; J5 b( ^) [; z6 h
doping and the authorities are just not good enough to catch them. That may9 c" x4 d' G6 H5 t5 Y8 U
be true, logically, but definitely will not make the case if there is ever a
, E: _ D- X$ ~, I- Hhearing by the governing body for water sports, FINA, to determine if Ye+ ] @/ P1 m4 z0 h, ~, _/ t
has doped. To ask whether it is possible to obtain a false negative in a( [5 g8 o' }) J0 Z1 w
drug test looks like a rigged question to me. Of course it is possible:
! _7 q3 D; O, e! @! ]% ]other than the athlete taking a drug that the test is not designed to detect- F" r% J7 \+ U$ f
, anyone who has taken quantum 101 will tell you that everything is$ f; n7 W* [" `: [! t& t
probabilistic in nature, and so there is a probability that the drug in an) ?) A8 k9 v4 A% e
athlete’s system could tunnel out right at the moment of the test. A slight- x% p6 l7 [4 z4 j; S+ T9 u- b
chance it may be, but should we disregard all test results because of it?
! ]8 v* }4 t" `& dLet’s be practical and reasonable, and accept that the World Anti-Doping
. \) l% P4 {2 f6 s @8 Q; K0 W$ Pagency (WADA) is competent at its job. Ye’s urine sample will be stored for
6 U* {$ h: u& `6 T Eeight years after the contest for future testing as technology advances.
5 M8 Q5 q* q) Z- T( u$ lInnocent 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-/ S' U0 h r" J" ^
competition drug test is already in effect, which Callaway failed to mention* j+ u8 B; t" o$ N. U3 u
. As noted in the president of WADA’s press release, drug testing for& v+ Q9 ]2 @ n, u7 z
Olympians began at least six months before the opening of the London' O: Y6 [( v/ @4 o
Olympics. Furthermore, 107 athletes have been banned from this Olympics for$ X' {- k5 c6 T; \# y, r6 n6 Y# S
doping. That may be the reason that “everyone will pass at the Olympic
9 m; k @$ {8 h2 V7 _! N- X7 _games. Hardly anyone fails in competition testing” — those who did dope
7 r' U6 j8 B, g: h, F4 ehave already been caught and sanctioned. Callaway is free to suggest that a. M5 t4 {" |, c% M( @7 g- d
player could have doped beforehand and fooled the test at the game, but this
! D0 B7 `" d7 C/ E# R2 ~possibility is certainly ruled out for Ye.2 c2 B' Y: N8 a6 Y7 M* d8 G1 e9 @, ^
0 _ z8 U* y7 l2 X% B# ]Over all, even though Callaway did not falsify any data, he did (. g' s! f& @3 E
intentionally or not) cherry-pick data that, in my view, are far too
8 Y& a5 g' d" Z. ^ q$ ysuggestive to be fair and unbiased. If you want to cover a story of a( u2 }* r# p$ I! ]* p$ O3 h8 F
suspected doping from a scientific point of view, be impartial and provide- c9 W8 y- W( n0 N
all the facts for the reader to judge. You are entitled to your9 A* ~ i! i+ }) Z8 w5 n K1 e3 |- L
interpretation of the facts, and the expression thereof in your piece,
- y9 [, I, G0 W6 k- D) K- G; fexplicitly or otherwise, but showing only evidence that favours your: S, u# l- T0 v0 k2 C7 Q6 [+ o
argument is hardly good science or journalism. Such an article in a journal
: O. c; h: K R( U0 \" R4 g# xsuch as Nature is not an appropriate example of how scientific research or# p0 }8 \& q9 o4 l7 G
reporting should be done. |
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