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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
( k" I6 E" J8 Z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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/ i, a4 w( W) w; P c; fhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html! s; w2 r5 }: {2 c8 F1 }
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
N+ r. f) v1 ^2 [, regard as one of the most prestigious and influential physical-science4 l; I1 P# t/ V+ N$ I+ {0 J2 J2 Z
magazines — publish a thinly veiled biased article like this. Granted, this
$ A5 i, k" o" B4 q( \" G2 ~is not a peer-reviewed scientific article and did not go through the
% p0 _" r; m& _* Hscrutiny of picking referees. But to serve as a channel for the general5 {; _ d% E9 t' M1 Y- _# P" g# a$ {
populace to be in touch with and appreciate science, the authors and editors2 Q$ N* _0 O9 P5 g0 S: A S* [
should at least present the readers with facts within the proper context,3 L: V9 s) J+ F
which they blatantly failed to do.% i8 b. q* B: g$ M, ~
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First, to identify Ye’s performance increase, Ewen Callaway compared her
0 b; i( c* I9 C+ uOlympic 400-metre IM time with her performance at the World Championships in: b! U) H1 A% m: f
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
& {6 A3 d4 ~1 p' U9 L: A# A! S. kanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
8 M. M( N% ~$ k; lpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
9 w/ T. i( ^) y3 l, {9 `improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the" W, I V- i! X6 M
difference between the gold and silver medal, I see no reason for 5.38 s to
, I, X3 @7 d7 Z) o ?be treated as 7 s.# ^# d" L5 Y- Q1 o( _' J
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Second, as previously pointed out, Ye is only 16 years old and her body is/ N6 Z1 O3 b3 H" m2 g9 U' G9 ]: D
still developing. Bettering oneself by 5 seconds over two years may seem
! b8 c6 L( h2 {2 yimpossible for an adult swimmer, but it certainly happens among youngsters.
* q' b6 S; ?6 ZAn interview with Australian gold medallist Ian Thorpe revealed that his 4001 f0 g* b1 C& d q2 W! x9 E# o3 H
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 }1 `' ?. _4 f9 M( D. t
For regular people, including Callaway, it may be hard to imagine what an
4 D: `7 ]" r: K; lelite swimmer can achieve as he or she matures and undergoes scientific and
: l, C- g. i8 n4 K. s2 g* i/ [persistent training. But jumping to the conclusion that it is “anomalous”! h0 x, p' ]- d
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! Q$ X: v9 ~' z3 H8 R
8 |' H+ p- i, S8 OThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
. Q# y7 _2 R6 \% sexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in; H" _6 o& Q5 a# [( D' r0 g
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
! ?) r' t) h) Che chose not to push himself too hard and to conserve his energy for later
( D$ D& _* E3 ?+ Xevents (whether this conforms to the Olympic spirit and the ‘use one’s
+ y) G# E9 P5 m9 a" Y. H1 _best efforts to win a match’ requirement that the Badminton World! Y. i4 N8 W4 M4 a. k+ b1 `. D0 R
Federation recently invoked to disqualify four badminton pairs is another. c- T) r7 i: p, F6 I$ Y" x
topic worth discussing, though probably not in Nature). Ye, on the other
3 ^9 }. e* t& ~1 }5 K: \hand, was trailing behind after the first 300 metres and relied on freestyle" y& S5 Z- a- Z: j
, in which she has an edge, to win the race. Failing to mention this' d/ Z1 Y) f2 A
strategic difference, as well as the fact that Lochte is 23.25 seconds
6 J4 \' S9 T$ @* |" v; ?- C, _ `& \faster (4:05.18) than Ye overall, creates the illusion that a woman swam1 f/ R: S) n$ W8 f1 S4 {. h
faster than the best man in the same sport, which sounds impossible. Putting2 \; w) f- d( I" ?0 J M: P2 A" l
aside the gender argument, I believe this is still a leading question that: i- z: @2 T. C1 v
implies to the reader that there is something fishy going on.
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3 K# k4 @7 k8 |Fourth is another example of cherry-picking. In the same event, there are
( [6 m- _/ T# A2 ]* xfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93% w7 m2 e/ L. f" _ c4 l
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s) B& u3 S/ U, K2 J. Q' ~1 Z
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
- i% l, O( @- E7 Q/ C* c' s8 j$ Kout, if we are just talking about the last 50 metres in a 400-metre IM,
# M& X4 q- s; H* b; d8 bLochter is not the example I would have used if I were the author. What kind
+ ~1 |$ w0 R8 P7 G" A+ tof scientific rigorousness is Callaway trying to demonstrate here? Is it
- M/ k$ H: |/ a# ~/ [3 P, }& {5 q% Slogical that if Lochter is the champion, we should assume that he leads in
$ h. g1 `5 O. I# [: Jevery split? That would be a terrible way to teach the public how science- ~0 t$ |- r3 u. r* a0 @! U& M
works.3 x5 b# |0 ^* Q' Y8 z
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
0 v! z4 u( u# m S- J9 q/ e( V3 {implies that a drug test cannot rule out the possibility of doping. Is this9 s, ^4 N& M6 [! P/ [
kind of agnosticism what Nature really wants to teach its readers? By that
E! g" Z; t* j- H/ ] sstandard, I estimate that at least half of the peer-reviewed scientific. |, ? p2 c9 G4 {- s
papers in Nature should be retracted. How can one convince the editors and
& p" v& C! c( {1 previewers that their proposed theory works for every possible case? One' N! |7 e" ]; ] ]8 f T! ]
cannot. One chooses to apply the theory to typical examples and to
. m: K- A3 a$ K. t: d; |demonstrate that in (hopefully) all scenarios considered, the theory works9 n* f7 A/ J1 v3 T" ~: |
to a degree, and that that should warrant publication until a counterexample3 Y/ v2 E( X$ F: \' r* i K
is found. I could imagine that Callaway has a sceptical mind, which is q! Z* j( p" `' s
crucial to scientific thinking, but that would be put to better use if he1 X) c# x4 |3 K3 X5 m5 v
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( ~# A/ A0 _1 ?% \* y
advanced, non-detectable drug that the Chinese have come up with in the6 a: ^$ X. y/ T; u7 t; W
past 4 years (they obviously did not have it in Beijing, otherwise why not0 [* d1 o* ?1 b3 i
use it and woo the audience at home?), based on data and rational derivation
) S% x! O5 R1 X: _% C. This article, however, can be interpreted as saying that all athletes are
% V, X& q$ i1 ]! P% }6 g0 Y, Wdoping and the authorities are just not good enough to catch them. That may$ J1 W' j* W& o) q; Z% [! @7 {
be true, logically, but definitely will not make the case if there is ever a' D* K3 h. b" g
hearing by the governing body for water sports, FINA, to determine if Ye2 ]% ^. n9 T! x+ g, ?
has doped. To ask whether it is possible to obtain a false negative in a
& @6 k! N2 _) w& C0 s- Wdrug test looks like a rigged question to me. Of course it is possible:
' K/ }1 B7 I+ ^! u" E8 F6 R3 Sother than the athlete taking a drug that the test is not designed to detect9 O* N( o1 w: ?& g2 f6 s! |: d+ [9 U
, anyone who has taken quantum 101 will tell you that everything is
6 m, Z- G- [# K! A2 \" A4 pprobabilistic in nature, and so there is a probability that the drug in an
3 ^- `2 I8 q. J0 Y5 q1 Qathlete’s system could tunnel out right at the moment of the test. A slight
% F, t5 v6 z) ^. g' ]# e% wchance it may be, but should we disregard all test results because of it?
o/ M0 x: F: ?8 TLet’s be practical and reasonable, and accept that the World Anti-Doping
8 D. S" Y* a; ~agency (WADA) is competent at its job. Ye’s urine sample will be stored for
% b( k! d$ C5 m8 E$ u4 C5 keight years after the contest for future testing as technology advances.
. r. V6 v0 f0 H3 F0 Z7 a2 ^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-: U! v6 O. Y" ^
competition drug test is already in effect, which Callaway failed to mention
; S, n2 Z7 \; r* I* q! a8 B. As noted in the president of WADA’s press release, drug testing for0 X8 x& E! l+ [$ q( Z" q
Olympians began at least six months before the opening of the London3 K0 M0 h q6 h' p8 ~
Olympics. Furthermore, 107 athletes have been banned from this Olympics for5 V [* @* w) c5 v* K# u- [3 ?: e
doping. That may be the reason that “everyone will pass at the Olympic C& s& @' }, ]7 t, u; K
games. Hardly anyone fails in competition testing” — those who did dope
4 w3 Q2 k3 g# E7 t4 `- s. fhave already been caught and sanctioned. Callaway is free to suggest that a
9 ]8 s" s3 ]5 f Xplayer could have doped beforehand and fooled the test at the game, but this6 C$ i% G7 L. U( j& [8 @3 E
possibility is certainly ruled out for Ye.
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+ ~/ l# _4 u& WOver all, even though Callaway did not falsify any data, he did (2 M8 n# N% L8 ~ E9 C
intentionally or not) cherry-pick data that, in my view, are far too+ U9 S! z, ?* y6 u4 ^
suggestive to be fair and unbiased. If you want to cover a story of a& V! r* \+ B' v- H. ~$ V4 h
suspected doping from a scientific point of view, be impartial and provide
! j- H% x: Q rall the facts for the reader to judge. You are entitled to your
4 W5 f" b- F! p0 Xinterpretation of the facts, and the expression thereof in your piece,
6 V$ F! A$ s4 |( T, p% T& Y8 Fexplicitly or otherwise, but showing only evidence that favours your
! Q6 Q4 M8 m/ Wargument is hardly good science or journalism. Such an article in a journal
/ Z7 V5 _: j3 ]8 e' X' tsuch as Nature is not an appropriate example of how scientific research or+ x8 V3 b6 S7 j" A
reporting should be done. |
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