 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
8 m# Y4 _! P9 c1 s1 i5 j: x如果是中国长大的,英语能到这种程度真是很不简单。" W9 w6 W* \$ I6 x/ e
+ u1 P7 Q4 X* b' l4 B8 A3 g/ X: thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
( y0 I# q* c9 n4 M. Z) i$ v% m" |/ s, a+ @5 {
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania3 b _$ ~9 c+ A/ S
& U3 W- W- F' \. H H4 L3 eIt is a shame to see Nature — which nearly all scientists, including myself
3 V" N: @% Y! s2 p/ [/ a, regard as one of the most prestigious and influential physical-science7 i ~* [5 E S8 ^3 `
magazines — publish a thinly veiled biased article like this. Granted, this
- X/ @" u5 q+ R* ais not a peer-reviewed scientific article and did not go through the
% c* d) i+ Q) l' S9 C m/ X- iscrutiny of picking referees. But to serve as a channel for the general3 y$ Z* b3 H3 @1 S1 V X5 i
populace to be in touch with and appreciate science, the authors and editors
8 s+ I& ?& A% s7 M9 H# Cshould at least present the readers with facts within the proper context,
2 Z. b& K) e4 L' c2 \% jwhich they blatantly failed to do.1 J. H% w$ q! c: }
: @, H/ x. t G/ k/ \7 D5 I- ~
First, to identify Ye’s performance increase, Ewen Callaway compared her3 o9 U- y# }) D/ k. Z! N
Olympic 400-metre IM time with her performance at the World Championships in
0 C3 d7 m7 T4 e4 \2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ S7 I" | Y* W2 I n! N, u( \
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous2 O: v* H1 u8 p/ Z
personal best was 4:33.79 at the Asian Games in 2010. This leads to an$ Y- Y2 }/ `8 ^: s; s
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
2 F1 |5 C' r4 Y9 O% ~0 D5 o8 }difference between the gold and silver medal, I see no reason for 5.38 s to# C$ f/ h1 J( C! ~7 W- j' z' w0 U
be treated as 7 s.
3 B+ {0 R8 M8 K
+ ? w) L; P* {7 T5 t3 K& nSecond, as previously pointed out, Ye is only 16 years old and her body is8 i$ V: g! a( n
still developing. Bettering oneself by 5 seconds over two years may seem, o' ~( m% P& [& h3 ?
impossible for an adult swimmer, but it certainly happens among youngsters.
1 @- Y$ Z$ ?8 ]An interview with Australian gold medallist Ian Thorpe revealed that his 400
7 I+ A$ S7 O1 }, F1 p-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
* p# @( X: K# z; M( \( y3 lFor regular people, including Callaway, it may be hard to imagine what an
2 v, W: {8 |9 Z' R0 {1 L: lelite swimmer can achieve as he or she matures and undergoes scientific and
! }2 ?8 H2 L' c$ B. w/ n7 b1 ipersistent training. But jumping to the conclusion that it is “anomalous”. t7 m% R2 v) w7 f' N
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
/ U# ~9 j( {& Q' [; `
0 R) ]( K% z6 B8 V; X! NThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook7 O0 H* x8 U1 ?* Q8 o0 e4 A% C7 ~
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
s* e8 x( q4 ^: g0 A6 } M6 f: athe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 H7 ]7 @- M; k* Bhe chose not to push himself too hard and to conserve his energy for later% \" g' Y' T5 Y
events (whether this conforms to the Olympic spirit and the ‘use one’s
3 i" {3 C, O. `- s# Sbest efforts to win a match’ requirement that the Badminton World$ v. ~. `4 V+ Q+ M1 } Z
Federation recently invoked to disqualify four badminton pairs is another
0 Z' M3 b6 ` btopic worth discussing, though probably not in Nature). Ye, on the other
0 D: `8 {- Q1 l& thand, was trailing behind after the first 300 metres and relied on freestyle
4 M0 U3 N# D0 X, in which she has an edge, to win the race. Failing to mention this7 h( D K6 h" l/ O6 J% {
strategic difference, as well as the fact that Lochte is 23.25 seconds0 b9 A: u7 q3 [
faster (4:05.18) than Ye overall, creates the illusion that a woman swam+ E) J9 @) l/ N# j k! O" c
faster than the best man in the same sport, which sounds impossible. Putting5 Z- D& @$ r9 D- |7 e
aside the gender argument, I believe this is still a leading question that! g K+ v- w, Y2 _4 d& K
implies to the reader that there is something fishy going on.
" p9 i7 z4 e+ o6 z! B8 }% V7 b! ?" E; g3 I0 s: b
Fourth is another example of cherry-picking. In the same event, there are
8 P9 }* b4 J1 w7 afour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93- E0 g% e) A" ^. e: I- z
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
, B2 R6 i7 }- R6 S0 l- S), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns7 c! c6 E* F* T3 S! Q- h
out, if we are just talking about the last 50 metres in a 400-metre IM,
. Q" e# v4 {0 U8 N- MLochter is not the example I would have used if I were the author. What kind& e* J" p$ A( A" a0 q9 t9 B# X0 H
of scientific rigorousness is Callaway trying to demonstrate here? Is it5 ^) }9 E$ }0 G0 c; ^
logical that if Lochter is the champion, we should assume that he leads in5 @. u- {: _$ ^/ N. M" L: C
every split? That would be a terrible way to teach the public how science
0 d9 Z$ I8 z" r1 j; z3 ?# Tworks.
3 }; L; U( p7 T* d
I5 K+ l$ _, J( \+ ]% CFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
. ^. r) S( r, vimplies that a drug test cannot rule out the possibility of doping. Is this
5 E9 H7 E2 D u8 {kind of agnosticism what Nature really wants to teach its readers? By that
, V u% @- o$ [( x1 o/ x2 T- xstandard, I estimate that at least half of the peer-reviewed scientific
3 c" k, M2 B4 H# R0 ]' Rpapers in Nature should be retracted. How can one convince the editors and
) j3 B$ [6 K+ k4 p; |& lreviewers that their proposed theory works for every possible case? One
# ?. t x Y Hcannot. One chooses to apply the theory to typical examples and to' D( {+ x: I* B$ N7 a8 z- ?( ^
demonstrate that in (hopefully) all scenarios considered, the theory works
) B( w# K7 }. O+ a: W% D9 Rto a degree, and that that should warrant publication until a counterexample, R p4 _: T4 t1 `! l
is found. I could imagine that Callaway has a sceptical mind, which is0 e9 B V( i6 H% Z3 b. ?' J* _
crucial to scientific thinking, but that would be put to better use if he
R3 K x1 p6 g/ lwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
4 q" ?/ {4 B5 b% l, aadvanced, non-detectable drug that the Chinese have come up with in the
# J1 m1 J8 K! ?4 s/ opast 4 years (they obviously did not have it in Beijing, otherwise why not$ y( i5 S4 d2 H4 S' N
use it and woo the audience at home?), based on data and rational derivation1 P# }: |: x' t, v5 C
. This article, however, can be interpreted as saying that all athletes are8 A) N8 N/ s% R' }% L2 a2 V
doping and the authorities are just not good enough to catch them. That may
' b! b4 N& O6 V2 rbe true, logically, but definitely will not make the case if there is ever a! u1 i+ a* o |6 _
hearing by the governing body for water sports, FINA, to determine if Ye
6 c3 b: D0 E9 Z( nhas doped. To ask whether it is possible to obtain a false negative in a' G1 s/ @7 f. M2 l8 t, n
drug test looks like a rigged question to me. Of course it is possible:( y; C; v1 R0 h, E
other than the athlete taking a drug that the test is not designed to detect
$ n$ Y2 j0 h& i% P, anyone who has taken quantum 101 will tell you that everything is
$ _. ^9 j) S5 z( v7 F5 a# aprobabilistic in nature, and so there is a probability that the drug in an
5 N& \# K' ?4 @6 E" R" D+ W3 ^0 ?/ Kathlete’s system could tunnel out right at the moment of the test. A slight
3 z# i1 u$ F8 v( Lchance it may be, but should we disregard all test results because of it?
7 e" r S0 F( u' |. B( ?" N3 ]Let’s be practical and reasonable, and accept that the World Anti-Doping
6 a! ^' C. }7 G# P- T4 c" Lagency (WADA) is competent at its job. Ye’s urine sample will be stored for# R; Z: f) a/ S" U, o5 p O
eight years after the contest for future testing as technology advances.: G2 E- t6 _3 K. W3 y
Innocent until proven guilty, shouldn’t it be?
6 b$ N5 L8 H1 T t+ E4 q1 q
* q$ P$ C% K# [5 x" e/ wSixth, and the last point I would like to make, is that the out-of-
' z- y/ I( g3 \( r7 N( Zcompetition drug test is already in effect, which Callaway failed to mention1 t" r& N: E( e- R8 z) e! p" N8 N
. As noted in the president of WADA’s press release, drug testing for2 G2 o' h. q& _' m
Olympians began at least six months before the opening of the London+ O3 d: V& }, b' `7 q
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
- G/ a+ k1 a6 S5 wdoping. That may be the reason that “everyone will pass at the Olympic
) ^4 r& y* E; [9 r$ p+ M/ w0 a2 pgames. Hardly anyone fails in competition testing” — those who did dope
- R3 T9 l- w9 f. chave already been caught and sanctioned. Callaway is free to suggest that a! {/ F5 |& B$ V* O2 @* n
player could have doped beforehand and fooled the test at the game, but this
3 Q5 u. e4 z7 bpossibility is certainly ruled out for Ye.
2 L, @5 r* f) X5 ^$ q( b* H$ ]# m
( L/ k) }. c# A9 D5 @/ xOver all, even though Callaway did not falsify any data, he did (* b+ d6 p* x1 t
intentionally or not) cherry-pick data that, in my view, are far too# i9 D& r' f D v
suggestive to be fair and unbiased. If you want to cover a story of a9 w( J! H ~: s. J/ W; P9 ?! b+ z
suspected doping from a scientific point of view, be impartial and provide
, C, h% {8 P A1 k uall the facts for the reader to judge. You are entitled to your
' {# h- e7 e5 V+ w7 hinterpretation of the facts, and the expression thereof in your piece,
4 w2 p( {5 r$ ~explicitly or otherwise, but showing only evidence that favours your3 v2 B3 Q1 h. A" t
argument is hardly good science or journalism. Such an article in a journal6 u) A9 N+ Z" Y. R
such as Nature is not an appropriate example of how scientific research or
8 V8 L0 g y) @- ]4 A/ o/ Yreporting should be done. |
|