 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 t$ Y3 ^% C0 G, [+ L
如果是中国长大的,英语能到这种程度真是很不简单。* \1 T! J2 v9 s4 x; \
w% F* `3 J t& P& U
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
6 h A- _6 e7 l% b$ y4 G" N0 A G+ L
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania1 i. {- x$ c- L7 ~
1 v- l7 ^+ q9 K# H% x0 b" C" v
It is a shame to see Nature — which nearly all scientists, including myself; Q" R. }0 G' A r& S* b2 w4 M! Z
, regard as one of the most prestigious and influential physical-science
' G' G+ w5 G, B$ Fmagazines — publish a thinly veiled biased article like this. Granted, this
8 c( m+ X: \4 ris not a peer-reviewed scientific article and did not go through the0 P k$ \$ j4 x% {; T: o8 x
scrutiny of picking referees. But to serve as a channel for the general+ H2 |7 q8 {' A: o; O
populace to be in touch with and appreciate science, the authors and editors6 V7 B( e4 b- L% D- w5 R
should at least present the readers with facts within the proper context,2 n2 O2 e4 D- n
which they blatantly failed to do.
3 y- l9 L& l& e7 f. N! `! ?. }
4 Q' }2 u9 w! uFirst, to identify Ye’s performance increase, Ewen Callaway compared her
: P8 F$ c( r; C2 D7 k/ v6 z+ B+ I' HOlympic 400-metre IM time with her performance at the World Championships in
2 { I R& i- G5 G8 E2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
7 z) z* J i, m+ i" G" Canomalous” improvement of around 7 seconds (6.72 s). In fact, her previous2 w( V& x( J- L7 e3 H
personal best was 4:33.79 at the Asian Games in 2010. This leads to an2 |; v. H5 {# f ^3 u* G
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the, ^7 o2 S( x! {- w' B
difference between the gold and silver medal, I see no reason for 5.38 s to
$ b5 D, I s0 i% Pbe treated as 7 s.
* c& l! l4 d' i
h( g5 q3 b' s q6 |- Q; v- o! LSecond, as previously pointed out, Ye is only 16 years old and her body is9 O Y- E" d0 Z6 t. J
still developing. Bettering oneself by 5 seconds over two years may seem0 [$ R* C% ]; [1 P7 S+ q
impossible for an adult swimmer, but it certainly happens among youngsters.
$ c5 l- r, {- G. V+ J- k. l$ }An interview with Australian gold medallist Ian Thorpe revealed that his 400
, R! O' l4 ]# K4 S-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
" g" I9 D) ^: sFor regular people, including Callaway, it may be hard to imagine what an
, @! F( k$ v* s( Welite swimmer can achieve as he or she matures and undergoes scientific and- X, |! B) G; e/ |
persistent training. But jumping to the conclusion that it is “anomalous”
( u$ p+ W" g1 abased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.% O! t8 X) Z9 E9 V/ O+ R
* P5 n& q. f) D* N; s- Q1 }, ?
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 v6 g+ a5 x7 r2 O( W" t% z
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
* d8 `+ N3 g i; w6 j5 Othe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
% [; m& Z4 _, v Xhe chose not to push himself too hard and to conserve his energy for later
, ? x" E6 y7 [! [, i' T, G6 qevents (whether this conforms to the Olympic spirit and the ‘use one’s
, s0 z. u1 i6 t9 y6 ~7 v- rbest efforts to win a match’ requirement that the Badminton World% s2 F. B( `- z( Y1 H- c/ P
Federation recently invoked to disqualify four badminton pairs is another
7 L. v% r% }, y Htopic worth discussing, though probably not in Nature). Ye, on the other' s6 w! ~ U, Q$ K3 C9 B: W, j" \
hand, was trailing behind after the first 300 metres and relied on freestyle' w1 h" A% K6 [
, in which she has an edge, to win the race. Failing to mention this* A# d$ [* I3 p. u
strategic difference, as well as the fact that Lochte is 23.25 seconds ~6 @. u& k" W1 ], f2 c
faster (4:05.18) than Ye overall, creates the illusion that a woman swam8 m7 K; ^" D3 A# I, ~
faster than the best man in the same sport, which sounds impossible. Putting2 Y) z! q6 I/ ~ d4 B7 G; Q0 j
aside the gender argument, I believe this is still a leading question that# w4 m% [* e5 x. f$ U* k' z C4 u
implies to the reader that there is something fishy going on.
+ x. Z" t% s7 @# M1 b# q$ v" z- j% [% y: K& Q/ ?5 |$ S! H
Fourth is another example of cherry-picking. In the same event, there are
9 N& h' a) W: L& G$ X. Z' l4 \four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93& e# a4 j& L3 R+ Q- D- K
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
* X8 f# f# e3 R* {), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns# E4 f3 ~ {" A w( z
out, if we are just talking about the last 50 metres in a 400-metre IM,- h/ n; K7 I4 \
Lochter is not the example I would have used if I were the author. What kind3 l5 x/ E5 W7 A2 k% T
of scientific rigorousness is Callaway trying to demonstrate here? Is it8 |# t! Y9 s& v7 c. f" g
logical that if Lochter is the champion, we should assume that he leads in. _1 q. ~, k, X5 B7 G, E
every split? That would be a terrible way to teach the public how science2 W: ^- N$ `& K" F1 _
works.* J7 ^. j" y( Y$ [" _, z1 k& L
I- s0 y" ]6 q+ V- ZFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
1 Z4 M* {5 i) W; cimplies that a drug test cannot rule out the possibility of doping. Is this* P! L0 ?% W! [+ {2 H/ S
kind of agnosticism what Nature really wants to teach its readers? By that/ M9 i9 V0 w/ u, z8 ~, }
standard, I estimate that at least half of the peer-reviewed scientific ~) r6 e" h8 j4 e& ^/ w" O
papers in Nature should be retracted. How can one convince the editors and
9 D4 w) O4 q2 T; h( O- S5 Nreviewers that their proposed theory works for every possible case? One/ M' Q# G) I1 R4 d
cannot. One chooses to apply the theory to typical examples and to7 {7 m4 Z, x- h
demonstrate that in (hopefully) all scenarios considered, the theory works
' @% q& X2 f2 |8 eto a degree, and that that should warrant publication until a counterexample" m8 t ?! q% O5 h$ @ w8 x' p: ?
is found. I could imagine that Callaway has a sceptical mind, which is5 c# D, u# J2 H# T0 ~
crucial to scientific thinking, but that would be put to better use if he
0 J1 e2 A9 D+ c. @4 Y8 ?wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: R% P- m0 K, gadvanced, non-detectable drug that the Chinese have come up with in the u# ~3 |: ], S8 K$ h$ t$ [0 A
past 4 years (they obviously did not have it in Beijing, otherwise why not% u& `/ k7 A3 c. e- Y( }
use it and woo the audience at home?), based on data and rational derivation
% {" m0 \4 \& n* d0 x. This article, however, can be interpreted as saying that all athletes are
' K7 N! Z G- h( M& T( [! h, K! bdoping and the authorities are just not good enough to catch them. That may
/ Q5 C, S: b( [& Ybe true, logically, but definitely will not make the case if there is ever a. V9 S- q9 i$ t' d
hearing by the governing body for water sports, FINA, to determine if Ye3 }; e$ s. G3 j B" K2 o
has doped. To ask whether it is possible to obtain a false negative in a( [ c% _5 a" x& }) G4 P0 Q
drug test looks like a rigged question to me. Of course it is possible:
! O: s) _! s, _- Jother than the athlete taking a drug that the test is not designed to detect
1 E5 u9 a; i+ F2 ]: ^1 Q, anyone who has taken quantum 101 will tell you that everything is. ~! S4 d8 P$ |4 A4 k4 [% P3 t
probabilistic in nature, and so there is a probability that the drug in an. h* M+ A9 p g) e. R |+ ?
athlete’s system could tunnel out right at the moment of the test. A slight/ @. W6 }; b. C7 W2 }1 R2 v
chance it may be, but should we disregard all test results because of it?6 Y( x$ b7 N, l
Let’s be practical and reasonable, and accept that the World Anti-Doping
! `' u! s/ z% p& j, ?; Z- b2 xagency (WADA) is competent at its job. Ye’s urine sample will be stored for
}2 ^8 w% d0 z1 {1 C Ceight years after the contest for future testing as technology advances.
3 B w/ G, e) P6 I2 z" M9 a. LInnocent until proven guilty, shouldn’t it be?( M5 O( y7 Z) m
: ~* p- J% N! R
Sixth, and the last point I would like to make, is that the out-of-( Y7 e' o, ]0 m( F% q
competition drug test is already in effect, which Callaway failed to mention
7 z5 C- D, D' U# V N. As noted in the president of WADA’s press release, drug testing for+ c5 J- ~* g& d8 ^$ f
Olympians began at least six months before the opening of the London' \4 q/ I6 w S" W3 g8 j5 S2 J& O
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
$ w. o9 E7 Z7 G* j/ ]! @0 q* |! bdoping. That may be the reason that “everyone will pass at the Olympic
, Z, @; C5 m, e8 T! e7 j) jgames. Hardly anyone fails in competition testing” — those who did dope1 r7 p/ [% N- N9 q2 h) A
have already been caught and sanctioned. Callaway is free to suggest that a
) |9 d0 [$ X. zplayer could have doped beforehand and fooled the test at the game, but this
( O% k: \0 ^: i: M. cpossibility is certainly ruled out for Ye., B5 y5 d0 g5 R8 r& s$ Y2 _
! d, U5 h {1 T
Over all, even though Callaway did not falsify any data, he did ( j! V+ v6 D, Q, |
intentionally or not) cherry-pick data that, in my view, are far too' i1 Q) D: j+ B0 l, J$ E
suggestive to be fair and unbiased. If you want to cover a story of a
) f' b% J# m- t0 Msuspected doping from a scientific point of view, be impartial and provide" Y5 E% N+ Y6 w4 Z: d7 F- f
all the facts for the reader to judge. You are entitled to your
0 Z1 U) u% N: ~/ Kinterpretation of the facts, and the expression thereof in your piece,& O: Y- M( e4 U+ ^. e$ N+ a; T
explicitly or otherwise, but showing only evidence that favours your( |% C) u z" ~% a4 G6 }
argument is hardly good science or journalism. Such an article in a journal
/ u6 u' I0 J' l% R/ h* m& ksuch as Nature is not an appropriate example of how scientific research or
* J% i' N. y) z* a; Nreporting should be done. |
|