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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
2 j0 b. c% w/ P+ ^5 B5 C 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 G0 J9 o! D' h
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania; F$ ?* W- [- f
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It is a shame to see Nature — which nearly all scientists, including myself
0 ]4 K$ H# [/ z5 K9 Y0 P, regard as one of the most prestigious and influential physical-science
) p! v5 @7 ]" [% w" V) ~! j' C: Pmagazines — publish a thinly veiled biased article like this. Granted, this" f! e3 {/ V! ?
is not a peer-reviewed scientific article and did not go through the
V% S- y9 l' z- u- E ^# H' kscrutiny of picking referees. But to serve as a channel for the general0 y$ T H( H$ [- s1 @
populace to be in touch with and appreciate science, the authors and editors; y9 x; V# t6 s+ j- O# l
should at least present the readers with facts within the proper context,
9 t3 Z1 A4 _/ w: ?) Awhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her1 Z0 p4 d. {( ~4 j* ^5 @/ g6 U
Olympic 400-metre IM time with her performance at the World Championships in; D$ J2 ]! C- g9 T- {6 D
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “& ^9 {' W+ p+ C5 ?
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous% y" D0 X, o$ m. {
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
1 d* b f5 f' C% X: E* dimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
$ A" d& e( Y$ w. ydifference between the gold and silver medal, I see no reason for 5.38 s to: Z3 J& [, A% o6 [, p& c0 V5 R9 S
be treated as 7 s.8 `- \5 q o. Q: g! ], r( g
+ {7 G) i- k* s, \. R3 ~
Second, as previously pointed out, Ye is only 16 years old and her body is F6 K1 a$ v+ h- |. b+ p& F: N9 V
still developing. Bettering oneself by 5 seconds over two years may seem- ]4 H K' I8 H) s1 A/ ^# j
impossible for an adult swimmer, but it certainly happens among youngsters.
; A' C8 d- I% T# u. @An interview with Australian gold medallist Ian Thorpe revealed that his 400. B0 W% m+ [" ]5 |
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.! B& G3 V& c: ` I+ i& V, e
For regular people, including Callaway, it may be hard to imagine what an
- o/ c/ }; {1 m! M: Xelite swimmer can achieve as he or she matures and undergoes scientific and. m5 c; ^1 d [
persistent training. But jumping to the conclusion that it is “anomalous”
6 \9 c7 |( V# |based 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
' d+ P. C. ?. i& _example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
) l2 J' I/ ^$ s/ w+ ~the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
2 k! B. d( n6 x' f( W; l! i/ ahe chose not to push himself too hard and to conserve his energy for later; H( ~, ?" {/ L8 n+ P1 ^
events (whether this conforms to the Olympic spirit and the ‘use one’s
, {" s$ e3 }" d8 Mbest efforts to win a match’ requirement that the Badminton World; J& p- t: t: o/ q, l/ C- o# f
Federation recently invoked to disqualify four badminton pairs is another) n# a& ]4 P6 s1 n. `2 z6 g; T
topic worth discussing, though probably not in Nature). Ye, on the other& J6 }" p7 B( N$ r# I2 W+ H0 f
hand, was trailing behind after the first 300 metres and relied on freestyle3 H, O# `* t# o) {; y
, in which she has an edge, to win the race. Failing to mention this4 J: F* h9 I/ S) w
strategic difference, as well as the fact that Lochte is 23.25 seconds
- R8 l& n' x, H! ufaster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 y8 f6 i3 d8 X( Mfaster than the best man in the same sport, which sounds impossible. Putting: b5 P- }) o3 Y
aside the gender argument, I believe this is still a leading question that# k7 W# g2 ^0 m# i
implies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are
' z, [. P8 ]% g' |four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.937 [/ ^0 u5 ^: y9 B0 b
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s$ u9 V- y- X2 c4 @! d2 u) h0 l w2 {
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
! F* Y! u( v4 ~4 R8 e( I8 Aout, if we are just talking about the last 50 metres in a 400-metre IM,& p6 ]3 {( ^8 @
Lochter is not the example I would have used if I were the author. What kind0 m) D z" o: J) a7 W" ^& ^
of scientific rigorousness is Callaway trying to demonstrate here? Is it/ x3 z$ e" l+ q: d
logical that if Lochter is the champion, we should assume that he leads in4 Q9 U: R) D0 V, G
every split? That would be a terrible way to teach the public how science$ V% Y: X& G7 f
works.- i8 x6 X/ R; s7 C
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and/ w4 q( f* Q1 z; E
implies that a drug test cannot rule out the possibility of doping. Is this7 r/ F& r7 p5 x2 L: K0 A: q
kind of agnosticism what Nature really wants to teach its readers? By that
$ \6 }; `. Q# }& t# ystandard, I estimate that at least half of the peer-reviewed scientific* ]; ]1 k5 g9 C" d( N, q [
papers in Nature should be retracted. How can one convince the editors and
0 F0 ]1 D" s, hreviewers that their proposed theory works for every possible case? One* S: {! X8 @0 ]# _) Z; n" `; C
cannot. One chooses to apply the theory to typical examples and to! y0 n8 r4 m$ A' T- w: f h
demonstrate that in (hopefully) all scenarios considered, the theory works+ m/ L0 o& Y# f& [( h
to a degree, and that that should warrant publication until a counterexample
$ G& R7 B2 g [% K v5 k( d5 n1 c" y: eis found. I could imagine that Callaway has a sceptical mind, which is+ n! d( u( ?( L
crucial to scientific thinking, but that would be put to better use if he
% W. x6 I$ T/ I$ U3 Lwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly: @! Q& B$ a% o. Z& ?
advanced, non-detectable drug that the Chinese have come up with in the
6 e/ U; M" w' `( u& o jpast 4 years (they obviously did not have it in Beijing, otherwise why not( g5 a5 Y, h# ]$ \" t9 c
use it and woo the audience at home?), based on data and rational derivation5 z4 N& b; p E) P$ G# }
. This article, however, can be interpreted as saying that all athletes are
/ A' M4 S- _3 H1 u( D5 _doping and the authorities are just not good enough to catch them. That may- A$ Q7 C$ C2 h9 R b% g6 O
be true, logically, but definitely will not make the case if there is ever a! _! n0 L4 u9 n/ o
hearing by the governing body for water sports, FINA, to determine if Ye0 m ]1 o6 I5 ]' q7 e( g2 i
has doped. To ask whether it is possible to obtain a false negative in a
% F$ I% T: f |/ E8 r) zdrug test looks like a rigged question to me. Of course it is possible:
* T: q3 I# t1 C; _+ i) W9 sother than the athlete taking a drug that the test is not designed to detect
% P. N: j! r7 R% z, anyone who has taken quantum 101 will tell you that everything is
+ ~6 j3 I$ ]8 iprobabilistic in nature, and so there is a probability that the drug in an
7 {# E% q0 c. K* D, ^) Sathlete’s system could tunnel out right at the moment of the test. A slight! y* C2 m# x: u2 d/ r# h
chance it may be, but should we disregard all test results because of it?( U0 A9 v0 F2 d% E
Let’s be practical and reasonable, and accept that the World Anti-Doping
, ^4 O% a; ?2 Q5 a: [+ |agency (WADA) is competent at its job. Ye’s urine sample will be stored for7 f) g# z; r6 S/ L2 m
eight years after the contest for future testing as technology advances.2 s1 L/ r1 \& l9 _
Innocent 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-+ o. i9 i0 \$ l5 {7 C
competition drug test is already in effect, which Callaway failed to mention4 F; t6 j/ l( T7 O5 y
. As noted in the president of WADA’s press release, drug testing for4 {# n" R: Y: M; g7 c: C) N
Olympians began at least six months before the opening of the London1 O) g( X' _! t* v
Olympics. Furthermore, 107 athletes have been banned from this Olympics for9 v- t8 a0 X" V# l" v* `8 g
doping. That may be the reason that “everyone will pass at the Olympic
( f# d5 Q: Q4 K [games. Hardly anyone fails in competition testing” — those who did dope
% z! q5 M- E% {5 T# A& Khave already been caught and sanctioned. Callaway is free to suggest that a
4 D" E0 Y+ s* f+ ]1 rplayer could have doped beforehand and fooled the test at the game, but this
/ [* w# N, u; g/ Fpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (! `, g; |1 m1 F v" p% L& j
intentionally or not) cherry-pick data that, in my view, are far too* g& `# ]/ w1 T" ]) {
suggestive to be fair and unbiased. If you want to cover a story of a
1 q. Q) _% h- r Csuspected doping from a scientific point of view, be impartial and provide) @* Z7 J# B3 H6 f e
all the facts for the reader to judge. You are entitled to your# ?$ V0 o$ B! ~: C% ]
interpretation of the facts, and the expression thereof in your piece,. l, x$ r" r* h n
explicitly or otherwise, but showing only evidence that favours your, h# f I) K: H+ M7 G. J( h4 u# O1 p
argument is hardly good science or journalism. Such an article in a journal$ k) R7 p' F: u) z) V8 }
such as Nature is not an appropriate example of how scientific research or
6 b' | a& [8 E# y- X0 Kreporting should be done. |
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