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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
, w& D3 M' Z N$ Z8 q1 K }如果是中国长大的,英语能到这种程度真是很不简单。4 S, n; Q( K c, Y* M& r. w- Q
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" P0 L$ I5 }0 L8 F' `# r
9 f) r, l) h* l! p' @: |* _% ]FROM LAI JIANG, Department of Chemistry, University of Pennsylvania1 N" X& z& K+ p7 S7 N# s
' Q( ^& ?$ L. Q8 E( R* XIt is a shame to see Nature — which nearly all scientists, including myself
& _1 m* K* Q8 g) H: I, regard as one of the most prestigious and influential physical-science
& Z9 f! I8 e9 W8 ~( {* A/ i. imagazines — publish a thinly veiled biased article like this. Granted, this
' O& \' A! `. g! v: qis not a peer-reviewed scientific article and did not go through the) s1 @' Y% _5 w& ]7 B! b
scrutiny of picking referees. But to serve as a channel for the general5 C( {5 |4 b* |( I; j
populace to be in touch with and appreciate science, the authors and editors9 D& L* f* }# l4 w2 R. D
should at least present the readers with facts within the proper context,1 A* h8 t ^7 u
which they blatantly failed to do.
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( y0 H B0 ]' m$ N k* t: u- i) oFirst, to identify Ye’s performance increase, Ewen Callaway compared her
2 J2 @" a# W! ?- |# E, O9 e6 FOlympic 400-metre IM time with her performance at the World Championships in% p8 w9 `, i* H/ { _
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
) ` j9 \ @( Q' oanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous' J& }0 ?; G+ h6 D. ?9 [5 V
personal best was 4:33.79 at the Asian Games in 2010. This leads to an u0 J# z1 E. L' p. x; H
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the" o1 c$ @) ?; U h- z" y7 g
difference between the gold and silver medal, I see no reason for 5.38 s to
! ]" I* u0 w2 B& q. B9 mbe treated as 7 s.' M4 I5 ~' |2 Z" m
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Second, as previously pointed out, Ye is only 16 years old and her body is
5 p% y/ B# ^& c& | F* ystill developing. Bettering oneself by 5 seconds over two years may seem
3 ?) B6 J! G0 R% kimpossible for an adult swimmer, but it certainly happens among youngsters.0 F7 A$ g" U. q3 Y! U. x! C
An interview with Australian gold medallist Ian Thorpe revealed that his 4004 G x/ e3 B; ~' K
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.. p0 Y4 B8 n4 s6 m/ O, C( f) K; O
For regular people, including Callaway, it may be hard to imagine what an
5 ?# X4 H5 o1 o$ O& a0 z8 W% Jelite swimmer can achieve as he or she matures and undergoes scientific and+ N4 j U$ U% B: \& y/ L
persistent training. But jumping to the conclusion that it is “anomalous”
( m& N* N# i% `3 bbased 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- @8 P! S) W2 S. O+ [+ h1 Q7 I
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in: ]3 f& o5 E# q2 }' W6 x
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
/ g) H8 [% Q n- U8 phe chose not to push himself too hard and to conserve his energy for later
c/ E: O( b4 O' C; d3 ^- k6 {5 @0 m" Bevents (whether this conforms to the Olympic spirit and the ‘use one’s
' l, \. s% C' W6 P* z$ l; tbest efforts to win a match’ requirement that the Badminton World, I- w7 e& z; A# `3 i
Federation recently invoked to disqualify four badminton pairs is another
# s' Q/ Z9 n4 Q( b5 |. Wtopic worth discussing, though probably not in Nature). Ye, on the other% }9 ? x% m5 p$ A2 F" s- E
hand, was trailing behind after the first 300 metres and relied on freestyle4 F+ i1 q6 c7 M% n
, in which she has an edge, to win the race. Failing to mention this
9 i H- v2 ]( O5 M* V, fstrategic difference, as well as the fact that Lochte is 23.25 seconds- t6 T6 h- _4 `/ U+ [
faster (4:05.18) than Ye overall, creates the illusion that a woman swam& s5 O% n4 G' k& p1 ]# ~
faster than the best man in the same sport, which sounds impossible. Putting
- _% ]2 G9 w( T6 j4 t; Naside the gender argument, I believe this is still a leading question that
) s! Y9 M F, |& V4 x6 jimplies to the reader that there is something fishy going on.+ C' e% t2 S* K$ X+ i" E
# L2 b D) [5 r* [/ R" B5 |Fourth is another example of cherry-picking. In the same event, there are+ y8 d- W) l# l5 j, j6 `" h H
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93( {" s1 h+ P; ]; E
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s: s1 Y% ^1 g& J& Z' B2 m
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns! \: B/ \0 H- o3 L1 I) A6 F$ }( U
out, if we are just talking about the last 50 metres in a 400-metre IM,
! x( p7 n+ j! V/ |Lochter is not the example I would have used if I were the author. What kind- Z' F9 m0 q d
of scientific rigorousness is Callaway trying to demonstrate here? Is it
3 _7 f# p( k, H. ]# H8 o( ^) O% Z# B7 clogical that if Lochter is the champion, we should assume that he leads in e' g# D9 e8 Y7 L/ _0 ?3 k
every split? That would be a terrible way to teach the public how science, V5 Q: A) ?8 C Z9 ?2 |3 U. O
works.) N. r$ x; O9 [. }: g
& x m# t6 [! K- M3 P! u1 T2 TFifth is the issue I oppose the most. Callaway quotes Ross Tucker and. _# {* [9 `5 [' _, C
implies that a drug test cannot rule out the possibility of doping. Is this
8 W6 ]8 h) H" N( e, Kkind of agnosticism what Nature really wants to teach its readers? By that: p( x2 J5 g V( S; e1 j3 A
standard, I estimate that at least half of the peer-reviewed scientific
5 ?$ ~1 ~4 z2 bpapers in Nature should be retracted. How can one convince the editors and% t9 P* n7 Y; H% f, a
reviewers that their proposed theory works for every possible case? One% G2 c' u: `6 J2 ~) z5 h6 z9 [
cannot. One chooses to apply the theory to typical examples and to* p. r5 M4 N* k& v8 [. g& U" p
demonstrate that in (hopefully) all scenarios considered, the theory works
* D! R6 t' o& _2 H+ @4 |to a degree, and that that should warrant publication until a counterexample- W% o1 \ N, A" M7 }: L
is found. I could imagine that Callaway has a sceptical mind, which is. u. m/ D8 _: N5 G) R
crucial to scientific thinking, but that would be put to better use if he' M6 q2 {6 A6 C
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: m0 x7 R3 G8 a% V% [0 K0 sadvanced, non-detectable drug that the Chinese have come up with in the
! Y) ~, y0 q; u6 t, C/ y" ypast 4 years (they obviously did not have it in Beijing, otherwise why not
: f: B) u& |/ y# f' P0 P2 J9 e$ nuse it and woo the audience at home?), based on data and rational derivation- O% W/ _% [3 n& b3 Y4 c/ Y
. This article, however, can be interpreted as saying that all athletes are
) |1 N. ?6 l' t- P8 Pdoping and the authorities are just not good enough to catch them. That may- r! y/ Y1 O- N5 ?
be true, logically, but definitely will not make the case if there is ever a% ^8 ?3 r. q8 c! c' N
hearing by the governing body for water sports, FINA, to determine if Ye
# b6 n, r3 T6 u. n) Ahas doped. To ask whether it is possible to obtain a false negative in a$ s3 b2 w4 [6 M& g- \. D& E2 ~3 t& t0 t$ r
drug test looks like a rigged question to me. Of course it is possible:
a# t+ u' J: @5 p0 x* C3 Iother than the athlete taking a drug that the test is not designed to detect
. T# B2 J4 D2 h$ t, anyone who has taken quantum 101 will tell you that everything is
8 j+ ^" J9 ~) o: m: uprobabilistic in nature, and so there is a probability that the drug in an
- x& K+ j- _6 b0 b9 a- l! A1 ?athlete’s system could tunnel out right at the moment of the test. A slight
_8 G4 z7 L3 U A$ \$ l7 Tchance it may be, but should we disregard all test results because of it?
( f0 O" `5 K: N2 ?8 m/ z* gLet’s be practical and reasonable, and accept that the World Anti-Doping! R- n& s7 J: ^2 x+ Z
agency (WADA) is competent at its job. Ye’s urine sample will be stored for) b( k; |; M( N& L1 e
eight years after the contest for future testing as technology advances.
6 X1 h- }, N; J9 l# F4 B9 K6 N& ZInnocent 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-
7 }. E* N5 O, G" ]! d4 L# X0 scompetition drug test is already in effect, which Callaway failed to mention
; _' Q4 B& M$ d$ t+ F- M% G+ l. As noted in the president of WADA’s press release, drug testing for
+ f* P8 b' D* U7 w/ E+ xOlympians began at least six months before the opening of the London! t; F/ L5 A/ z4 `1 p, K
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
2 N# k% F6 `. }' M* H' Pdoping. That may be the reason that “everyone will pass at the Olympic* y3 i* a; s% q$ p: @# |/ ]
games. Hardly anyone fails in competition testing” — those who did dope1 Z- k" _% q& I$ d: ]4 g/ |
have already been caught and sanctioned. Callaway is free to suggest that a
: l ?) G7 W9 L: F" d2 f |player could have doped beforehand and fooled the test at the game, but this% W, L# O5 T7 ^+ M8 J4 P
possibility is certainly ruled out for Ye.7 @- S7 J7 z( I7 W+ }
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Over all, even though Callaway did not falsify any data, he did (
5 s8 k: f& o: ^ Lintentionally or not) cherry-pick data that, in my view, are far too; ]. ]- Q0 o. t c* @# T
suggestive to be fair and unbiased. If you want to cover a story of a! C4 S) l/ x1 R6 B' W$ F
suspected doping from a scientific point of view, be impartial and provide5 N5 X! K. ], m1 Q+ x* |; Y; s
all the facts for the reader to judge. You are entitled to your- Q5 O2 ~/ a, ~; ?. n) W% i
interpretation of the facts, and the expression thereof in your piece,
R2 B' {9 ^+ B2 R3 g0 ^explicitly or otherwise, but showing only evidence that favours your
5 i' {( s. e! c8 x: aargument is hardly good science or journalism. Such an article in a journal
- W" Y' t% x' k, S$ ^3 i% \5 Rsuch as Nature is not an appropriate example of how scientific research or0 |, x2 Q' S7 x; ?; [" h) ?' C
reporting should be done. |
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