 鲜花( 5)  鸡蛋( 6)
|

楼主 |
发表于 2012-8-14 00:55
|
显示全部楼层
其实比饶毅更牛的回复是 Upenn 的 LAI JIANG
- `* z2 f* P2 t3 i. K: l. a) q如果是中国长大的,英语能到这种程度真是很不简单。
# W5 P. V$ ]# ~, X6 t3 Q1 d3 h; K
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html+ @6 @# ]; c3 `
0 ~6 ]8 q9 l# |" u9 H1 wFROM LAI JIANG, Department of Chemistry, University of Pennsylvania. X9 B, R8 `5 }! V. z
6 i/ m) i9 P) I* `* b
It is a shame to see Nature — which nearly all scientists, including myself
2 |+ z8 T q# C8 D0 S, regard as one of the most prestigious and influential physical-science
$ W3 O9 g5 w8 N9 \7 [# j+ `. ? xmagazines — publish a thinly veiled biased article like this. Granted, this
" y5 y" N# ~: t6 ]5 Vis not a peer-reviewed scientific article and did not go through the5 x% G2 w6 h' u7 d$ {; V
scrutiny of picking referees. But to serve as a channel for the general
7 d; s. i z! N" m9 e6 hpopulace to be in touch with and appreciate science, the authors and editors# N- u' X5 g1 A* u- H- {
should at least present the readers with facts within the proper context,
, R' O1 u- L$ [& g- w3 jwhich they blatantly failed to do.! p7 L' h! g+ E M5 c. `0 E
* f% U/ J" G: A& x4 ^: ^" Z
First, to identify Ye’s performance increase, Ewen Callaway compared her3 ]- B* e& K' B( V' k) g
Olympic 400-metre IM time with her performance at the World Championships in
+ ^3 q8 u# F) z; G( Y' o( g2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “" B0 C+ `! _) j$ R1 h
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
) B) H7 l3 E. I# }" {personal best was 4:33.79 at the Asian Games in 2010. This leads to an
5 K4 T! V5 d2 A" X7 l( y7 gimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
& l; D4 s8 T* C5 i5 Ndifference between the gold and silver medal, I see no reason for 5.38 s to6 h/ v, l" @. _2 e3 W0 N
be treated as 7 s.
0 i/ _/ K$ w! J1 o9 s" c9 F% h" ^. G0 w5 x5 s4 g4 L
Second, as previously pointed out, Ye is only 16 years old and her body is
$ _$ u0 m* F8 M/ E4 Z _/ Nstill developing. Bettering oneself by 5 seconds over two years may seem
& N- y8 u* K9 o! u3 Yimpossible for an adult swimmer, but it certainly happens among youngsters.6 I. z4 ?% w" \" H. q
An interview with Australian gold medallist Ian Thorpe revealed that his 400
# H' N5 x, Z4 `! x+ `- s4 s-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
" q1 i1 m, e9 A' LFor regular people, including Callaway, it may be hard to imagine what an* Y% r' A# p# [7 n# f% K0 C
elite swimmer can achieve as he or she matures and undergoes scientific and
# Z- w5 F+ K5 Z# t3 jpersistent training. But jumping to the conclusion that it is “anomalous”! b( u$ c1 _: \4 `1 w% `4 v
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
8 v8 x' D! g( y- t V1 {
$ n1 { k. x+ qThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook" N h' c9 j1 N6 {2 H0 y
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in* K `" P& M9 Z% P2 t' y/ n
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
{* T* e# Z- Q" n; U. Ihe chose not to push himself too hard and to conserve his energy for later
9 L' B6 `. j0 |& j& z6 D+ D$ [; w2 Cevents (whether this conforms to the Olympic spirit and the ‘use one’s
( k5 M" ]2 U: |best efforts to win a match’ requirement that the Badminton World
& O" b* h7 f! w, h, @Federation recently invoked to disqualify four badminton pairs is another" a' p% ?# k5 \1 u6 c4 X+ E
topic worth discussing, though probably not in Nature). Ye, on the other0 E8 T, M: T$ x: S2 K! i- H
hand, was trailing behind after the first 300 metres and relied on freestyle" t6 T% W' W! p4 F
, in which she has an edge, to win the race. Failing to mention this# N" J. T/ n Y% d
strategic difference, as well as the fact that Lochte is 23.25 seconds" I% z) \1 v0 r& { U
faster (4:05.18) than Ye overall, creates the illusion that a woman swam- K& X' z2 L: `
faster than the best man in the same sport, which sounds impossible. Putting
0 d! f/ U# b# K& R, _aside the gender argument, I believe this is still a leading question that
, u0 N% K; q2 e( k* M9 D% uimplies to the reader that there is something fishy going on.9 t# P7 W# H- H# u7 b- V
3 D9 k7 c5 @5 |8 pFourth is another example of cherry-picking. In the same event, there are+ L' J; B- ~3 O/ W$ P! Z8 M6 s
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93" u0 d7 o$ w1 c+ I) P* [. e' u7 t2 W
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s/ j2 w$ Q4 B0 ^2 U- z; ^
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
& l( o, i/ B4 B5 e6 Xout, if we are just talking about the last 50 metres in a 400-metre IM,
B( X( h" h' S* X1 ZLochter is not the example I would have used if I were the author. What kind- |- q& Z9 n D p3 q$ C
of scientific rigorousness is Callaway trying to demonstrate here? Is it, F% a0 e- `# ^" U
logical that if Lochter is the champion, we should assume that he leads in) ]1 b* y2 i$ {. |3 u( [
every split? That would be a terrible way to teach the public how science4 F: o s. @9 c# ~2 S+ F. C
works.3 |0 m3 F' Q5 Y' I9 K1 H% g
7 T) g6 l6 a. K8 `1 E
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
8 ~2 A% V9 t; Bimplies that a drug test cannot rule out the possibility of doping. Is this
: n$ a( w" `) U _/ m8 }kind of agnosticism what Nature really wants to teach its readers? By that
6 K) [, b5 n1 n, Dstandard, I estimate that at least half of the peer-reviewed scientific
. d% y2 U! P6 M5 O, W$ Y+ m f1 Lpapers in Nature should be retracted. How can one convince the editors and [7 Y' P( W* {" W
reviewers that their proposed theory works for every possible case? One
, y& w" H- X. K) R7 g; Mcannot. One chooses to apply the theory to typical examples and to
2 |8 j# d4 a6 k+ O; _9 u9 R) `" Hdemonstrate that in (hopefully) all scenarios considered, the theory works
+ R9 |) n, f1 w: v3 n- c( eto a degree, and that that should warrant publication until a counterexample
' z- F6 a# g% d) E3 L- N: wis found. I could imagine that Callaway has a sceptical mind, which is
9 b( d6 D0 V5 [. G' z6 ?% M5 Jcrucial to scientific thinking, but that would be put to better use if he
% P8 ^7 v# [+ w4 m4 Lwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
$ R6 h5 \ O# f+ s" A4 a' l. oadvanced, non-detectable drug that the Chinese have come up with in the
8 ?1 f K4 A# h' j, xpast 4 years (they obviously did not have it in Beijing, otherwise why not
( j' u2 {* c, b% n0 S( H" Z; Cuse it and woo the audience at home?), based on data and rational derivation6 \1 t- D y, G, ^9 j5 ~
. This article, however, can be interpreted as saying that all athletes are
# V% G8 A4 K% `/ a* cdoping and the authorities are just not good enough to catch them. That may
9 ^8 g4 h; W# _3 i* _& ^be true, logically, but definitely will not make the case if there is ever a) l+ A5 S4 k* h. g4 c$ r! F
hearing by the governing body for water sports, FINA, to determine if Ye# M1 y- O, _ z! H: l6 d
has doped. To ask whether it is possible to obtain a false negative in a
) Y k4 f8 t6 [9 p8 l6 i& x6 P) Qdrug test looks like a rigged question to me. Of course it is possible:
- K; j# {/ L% H5 dother than the athlete taking a drug that the test is not designed to detect" x+ a2 C1 }. r- K
, anyone who has taken quantum 101 will tell you that everything is
R q1 I" Q% f; A, {6 Lprobabilistic in nature, and so there is a probability that the drug in an
3 o/ A$ e5 b. W" T* Cathlete’s system could tunnel out right at the moment of the test. A slight
/ B; i- P+ q* m6 W8 ^' Fchance it may be, but should we disregard all test results because of it?
" B3 t- c; [! W$ ZLet’s be practical and reasonable, and accept that the World Anti-Doping, b# Q, ~" v0 ^& S5 b
agency (WADA) is competent at its job. Ye’s urine sample will be stored for" ~0 Q7 J. a9 ^
eight years after the contest for future testing as technology advances.
2 K$ y6 n5 k/ c0 i* OInnocent until proven guilty, shouldn’t it be?
' f% L1 ?+ `, o. P
# ?8 y; j3 r$ m; b* N$ vSixth, and the last point I would like to make, is that the out-of-5 D% L1 o5 ]" G6 L3 t* j4 q; u
competition drug test is already in effect, which Callaway failed to mention# [9 o; d4 f, a/ i
. As noted in the president of WADA’s press release, drug testing for% h& s0 ^0 X# c8 Q" p( l
Olympians began at least six months before the opening of the London% K: Z+ _5 i1 d V+ F+ f" v
Olympics. Furthermore, 107 athletes have been banned from this Olympics for' x( E; v4 d0 Z- h
doping. That may be the reason that “everyone will pass at the Olympic
( j! M2 ]* z9 C" K- @games. Hardly anyone fails in competition testing” — those who did dope5 x, I) X% p ]" g2 `$ q
have already been caught and sanctioned. Callaway is free to suggest that a
1 h' ]; F1 Z: y! f% N: E8 ~ Cplayer could have doped beforehand and fooled the test at the game, but this
! ?) O; v( e: ~possibility is certainly ruled out for Ye.
0 M `0 D. k q3 G1 O0 S4 q
/ y/ x9 L( ^& c |Over all, even though Callaway did not falsify any data, he did (4 G/ p9 p; f# I/ X& Y
intentionally or not) cherry-pick data that, in my view, are far too8 H, N, p1 \6 }# i, X" ?0 o! Z
suggestive to be fair and unbiased. If you want to cover a story of a7 `7 `6 T( T' R0 t; h8 s* W7 J
suspected doping from a scientific point of view, be impartial and provide2 M. b) `" T' v! U
all the facts for the reader to judge. You are entitled to your
5 U* W8 W9 q$ h h) J% Cinterpretation of the facts, and the expression thereof in your piece,9 e& f9 {* w' o9 i" F
explicitly or otherwise, but showing only evidence that favours your
1 r' s) H+ o# N& C9 ]3 {argument is hardly good science or journalism. Such an article in a journal
& d' n5 v6 d" {" [, u: U U2 Gsuch as Nature is not an appropriate example of how scientific research or6 E) Z8 J9 ]/ ?6 v
reporting should be done. |
|