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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" _6 k: A: c: [9 R- N* B2 W
如果是中国长大的,英语能到这种程度真是很不简单。/ ^; Z* m; ]* w) I/ T* G
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" n* b! G( @8 b# U) X3 Q" Q$ r1 d, f
8 d/ S4 u5 v. _, F8 f# a' [ P9 IFROM LAI JIANG, Department of Chemistry, University of Pennsylvania8 T# t3 ^) p6 i( X8 D6 a% r% V2 r
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It is a shame to see Nature — which nearly all scientists, including myself: k' |& X- N1 U S- G: S
, regard as one of the most prestigious and influential physical-science
# \1 _4 {7 d; _* F w1 R4 l' H9 T0 Kmagazines — publish a thinly veiled biased article like this. Granted, this
, K$ F: n7 l7 Bis not a peer-reviewed scientific article and did not go through the R3 I8 E- [0 N5 e) Z. U8 B
scrutiny of picking referees. But to serve as a channel for the general
$ F7 S7 p; z) u; w& @: ?9 D% Qpopulace to be in touch with and appreciate science, the authors and editors3 U+ b Y. E3 m0 v1 S1 e2 |+ X
should at least present the readers with facts within the proper context,- G; w) _* V! r' `5 i; S
which they blatantly failed to do.$ b9 G$ \; `3 ~! D/ G! H
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First, to identify Ye’s performance increase, Ewen Callaway compared her8 e& n# i1 {: @
Olympic 400-metre IM time with her performance at the World Championships in
" x! a' H; |* @6 Z$ V: `: t% x2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
& k# ]% I/ R; J" C* T: |anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
) r6 M1 |" v6 T6 E4 Dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an* o: o, [( y4 P9 B
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
4 @8 i7 X- g+ rdifference between the gold and silver medal, I see no reason for 5.38 s to
. v6 u+ `1 T- m9 hbe treated as 7 s.
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+ E& d# M( K/ D5 bSecond, as previously pointed out, Ye is only 16 years old and her body is r2 N8 ] @+ V0 y. b4 M- e
still developing. Bettering oneself by 5 seconds over two years may seem
3 ^# n2 i4 ~/ Z4 c7 C( [impossible for an adult swimmer, but it certainly happens among youngsters.% ~: E4 q0 A; f: |/ H
An interview with Australian gold medallist Ian Thorpe revealed that his 400* F( J6 W* y9 O( l; t( D" [
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.- o1 Z- g) ?0 ]
For regular people, including Callaway, it may be hard to imagine what an0 X8 s6 t; t% R
elite swimmer can achieve as he or she matures and undergoes scientific and
' @' h' l; G: xpersistent training. But jumping to the conclusion that it is “anomalous”
9 Y5 l. y* [5 w9 m( Zbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.% {- V3 k( P8 r5 Q4 Z8 i K6 I
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
/ \% X+ |# @! u3 x; o* Bexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
+ j3 [5 Z8 r2 c! [& y! B% u( Ethe last 50 metres, but Lochte had a huge lead in the first 300 metres, so9 H; p. A' E% Y4 R
he chose not to push himself too hard and to conserve his energy for later
) _, W6 _4 b( P2 k0 j# s' fevents (whether this conforms to the Olympic spirit and the ‘use one’s
- q9 Q) p W1 e. O7 _% g& lbest efforts to win a match’ requirement that the Badminton World
& }4 |9 R# Q6 p7 k- E2 {Federation recently invoked to disqualify four badminton pairs is another
6 Q i. t/ {. Y& X8 `topic worth discussing, though probably not in Nature). Ye, on the other; I/ }- L3 K6 L4 B
hand, was trailing behind after the first 300 metres and relied on freestyle, v5 ?( k; a9 s' E Q
, in which she has an edge, to win the race. Failing to mention this) H$ y; v* T( i# C7 [) o
strategic difference, as well as the fact that Lochte is 23.25 seconds
: m; O; |% ^6 ? V/ j4 k( d( gfaster (4:05.18) than Ye overall, creates the illusion that a woman swam% O- s3 r* u7 V( P* O d, Y
faster than the best man in the same sport, which sounds impossible. Putting
$ [( t1 E1 I; v, w7 x% R$ A Kaside the gender argument, I believe this is still a leading question that
* M. \/ O) A$ h Mimplies to the reader that there is something fishy going on.4 k( q$ H( k1 w# Y: [3 j$ G
) S, f ]% o: Y @7 w2 F! QFourth is another example of cherry-picking. In the same event, there are+ x6 O C5 r3 R1 p) H
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93$ F [5 O3 ~" J C0 m& E1 M+ j. P
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
2 b/ s9 c# U# r9 n' z: }6 |7 n), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
- K; U0 q6 O: L2 P, y" m) [; e0 Lout, if we are just talking about the last 50 metres in a 400-metre IM,7 I3 m8 W7 F! X$ A5 P
Lochter is not the example I would have used if I were the author. What kind
5 E# ?& E% |3 h( X1 Q# nof scientific rigorousness is Callaway trying to demonstrate here? Is it
3 ]) U# b& b- M" `: K& b4 l3 ulogical that if Lochter is the champion, we should assume that he leads in
. q! F$ |: Z1 \( |* k; x: r2 E& z3 {every split? That would be a terrible way to teach the public how science
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and) b- J9 b6 w$ i4 N* o7 d% q
implies that a drug test cannot rule out the possibility of doping. Is this
) }- z' ~, @3 x4 r/ F$ S; m2 ikind of agnosticism what Nature really wants to teach its readers? By that
) H; {: x& Q' c2 {% R/ }' Fstandard, I estimate that at least half of the peer-reviewed scientific8 o4 T' r7 H0 ^- Q$ Z' @: a
papers in Nature should be retracted. How can one convince the editors and
8 r6 l+ M9 S- ^5 G5 f7 J( k) freviewers that their proposed theory works for every possible case? One
* c" O2 Y a* o: g5 A f# @1 {# Bcannot. One chooses to apply the theory to typical examples and to
( S5 \' D1 i0 S: Z& B) P% A- ~demonstrate that in (hopefully) all scenarios considered, the theory works
d/ M/ G+ z+ ~& w$ hto a degree, and that that should warrant publication until a counterexample
5 S! f5 _% d* {. Bis found. I could imagine that Callaway has a sceptical mind, which is
$ O; F0 U# O% ?# P# }crucial to scientific thinking, but that would be put to better use if he
s" p5 C$ [9 @, Q3 z6 wwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly1 L1 j. F# }0 I- {
advanced, non-detectable drug that the Chinese have come up with in the
' j/ ~% b2 N1 C- d5 {6 _0 T# _& I Upast 4 years (they obviously did not have it in Beijing, otherwise why not
) a) j- P/ d' H+ D; N! D7 ^use it and woo the audience at home?), based on data and rational derivation
( Q3 V( W# |1 s# s: F. V/ R0 i. This article, however, can be interpreted as saying that all athletes are* j& L4 O( l1 L: \
doping and the authorities are just not good enough to catch them. That may# r6 q: u1 A( q8 q" U" X
be true, logically, but definitely will not make the case if there is ever a. S5 o F7 s9 Z, y9 g
hearing by the governing body for water sports, FINA, to determine if Ye4 r( x8 D4 _2 z6 N; S, q
has doped. To ask whether it is possible to obtain a false negative in a
& H1 `! ^% B5 }; A% Zdrug test looks like a rigged question to me. Of course it is possible:$ d3 t! v$ l# i/ [
other than the athlete taking a drug that the test is not designed to detect
4 M$ a1 p q) ^2 z! c8 d# J% s a, anyone who has taken quantum 101 will tell you that everything is
" z1 W. J q% \probabilistic in nature, and so there is a probability that the drug in an& [- }' d9 b$ G, T |8 p
athlete’s system could tunnel out right at the moment of the test. A slight Z0 A, W3 ~, t! }+ o' G& @" [
chance it may be, but should we disregard all test results because of it?
- g7 T. Q; m! z1 V! g$ oLet’s be practical and reasonable, and accept that the World Anti-Doping J7 Q& p! U5 X, j9 W7 d- [
agency (WADA) is competent at its job. Ye’s urine sample will be stored for9 _8 _1 C+ O7 F8 N8 `
eight years after the contest for future testing as technology advances.: o4 E4 @1 P+ s- N' l; k
Innocent until proven guilty, shouldn’t it be? f0 |7 T6 w( q' B9 H) L* s# M
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Sixth, and the last point I would like to make, is that the out-of-# v: X8 ]; v9 p
competition drug test is already in effect, which Callaway failed to mention1 n4 N) T A! G& G' v: M
. As noted in the president of WADA’s press release, drug testing for
9 T# U) R+ T/ q* s" W, ?/ O5 ZOlympians began at least six months before the opening of the London
' D1 f3 w/ ]. G6 u# y* {: U9 JOlympics. Furthermore, 107 athletes have been banned from this Olympics for
3 V( R% R: Z( ~/ `4 y+ vdoping. That may be the reason that “everyone will pass at the Olympic% W& w( _, u5 J2 ?" _( ^& G
games. Hardly anyone fails in competition testing” — those who did dope1 J" z. K' n; S* _+ o! T! K
have already been caught and sanctioned. Callaway is free to suggest that a6 R0 L+ V4 ]4 l9 F* ?
player could have doped beforehand and fooled the test at the game, but this
- Q( ?- ?5 s* ~% t( s& Xpossibility is certainly ruled out for Ye.+ H; C# a3 z# f, k
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Over all, even though Callaway did not falsify any data, he did (
/ r' T! h5 f2 e# Jintentionally or not) cherry-pick data that, in my view, are far too4 g) ]& H+ L& M% n% D+ X
suggestive to be fair and unbiased. If you want to cover a story of a, F9 j3 W- |' v( M' q
suspected doping from a scientific point of view, be impartial and provide# _8 `& A2 P; \' P) C, T- G
all the facts for the reader to judge. You are entitled to your3 Y' I7 [: R4 B2 y6 m- i
interpretation of the facts, and the expression thereof in your piece,7 P1 N6 v) g4 ], S6 U. A
explicitly or otherwise, but showing only evidence that favours your
+ F: j* n( U7 \$ aargument is hardly good science or journalism. Such an article in a journal) g, W4 f/ W; [6 ^
such as Nature is not an appropriate example of how scientific research or: {; A2 F! } T, H0 @: A
reporting should be done. |
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