 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
1 s* S {- d/ m5 w, u如果是中国长大的,英语能到这种程度真是很不简单。
8 J/ Y2 Z# i. W3 `% D: G' S$ L( V+ `6 ?+ L0 W! A! o# S8 t' U" l
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html( X5 T4 C1 n( J& L: B4 _
. S- B+ |% |7 V( H& S% Q( m0 VFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
/ T+ ]% l. [! X5 y
. x. X% a! Y2 P' x+ {It is a shame to see Nature — which nearly all scientists, including myself5 b. l) f$ k" a- S8 z
, regard as one of the most prestigious and influential physical-science$ @( L1 B u; d4 J
magazines — publish a thinly veiled biased article like this. Granted, this
# y4 j1 L" i+ f$ B% mis not a peer-reviewed scientific article and did not go through the/ M- ]/ S4 ~' e! D; k
scrutiny of picking referees. But to serve as a channel for the general) ?, x$ k: W0 t; N& x! [/ u' g. ~
populace to be in touch with and appreciate science, the authors and editors
' D0 |$ N5 ^' o3 L+ M7 D, Cshould at least present the readers with facts within the proper context,! {4 Z0 E$ Y. K# {) h% w4 a- J! R
which they blatantly failed to do.! M1 Y! V* G& X
, t6 Z0 e4 q/ H: `
First, to identify Ye’s performance increase, Ewen Callaway compared her
3 P" s1 g) C0 g; ]! i5 H; xOlympic 400-metre IM time with her performance at the World Championships in: A: v- t m+ h& P( E, j
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “1 L: c$ m, L9 D2 u7 {1 k
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
$ x1 u. y" c% }; d6 f8 lpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an, S6 O% m* t) Q0 x9 D
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the, m0 G, a1 e5 g: D, C2 m* o; S
difference between the gold and silver medal, I see no reason for 5.38 s to4 n# k9 x7 D, G E/ ]- `
be treated as 7 s.5 T8 t+ {$ @+ w1 q7 M# S* y5 s1 M
- J; ^) [$ L3 W& OSecond, as previously pointed out, Ye is only 16 years old and her body is
4 }$ l+ q: }! Y% _+ O4 b0 B# T5 Ostill developing. Bettering oneself by 5 seconds over two years may seem( _; v4 w" O: r; V
impossible for an adult swimmer, but it certainly happens among youngsters.
) ?: ^/ {$ \* X6 P9 F" R2 g N) |An interview with Australian gold medallist Ian Thorpe revealed that his 400, |3 q8 g" u8 H+ b f
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
/ f% U( D) g% X0 x9 T! hFor regular people, including Callaway, it may be hard to imagine what an8 a: i2 Y. h3 ?! Q/ z
elite swimmer can achieve as he or she matures and undergoes scientific and8 v2 `- j+ G* ~6 Z
persistent training. But jumping to the conclusion that it is “anomalous”
0 [1 H: |! n0 i+ Rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound." d- ?, ]$ m G$ E
' j8 f9 r9 f# Q% M- bThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
3 m+ u; D% E3 u! l- l" ]9 [example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in5 s2 Q/ }( J. w, M' t }# U0 f% d+ y
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
2 n- t2 N) @9 j+ y: ]. E* h$ Rhe chose not to push himself too hard and to conserve his energy for later
6 n H; D; r: O7 {, h; ]2 yevents (whether this conforms to the Olympic spirit and the ‘use one’s
/ [' e y0 [6 m; ?* Fbest efforts to win a match’ requirement that the Badminton World, m9 B2 o! |" I/ ]
Federation recently invoked to disqualify four badminton pairs is another% }4 o N8 @( {0 S+ U+ @- Y/ J7 y$ P
topic worth discussing, though probably not in Nature). Ye, on the other
4 D" R5 j# W" qhand, was trailing behind after the first 300 metres and relied on freestyle8 }2 I" y1 S& e- Q1 q6 W4 _* x
, in which she has an edge, to win the race. Failing to mention this
* c" p' b/ U: ?- p- u9 lstrategic difference, as well as the fact that Lochte is 23.25 seconds
0 J8 r6 L$ n' i6 c6 ~7 jfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
0 _, O5 D! _4 l7 efaster than the best man in the same sport, which sounds impossible. Putting
3 K- b! D& e ^aside the gender argument, I believe this is still a leading question that/ }# h* Z$ R# m
implies to the reader that there is something fishy going on.
& f' D& v! J/ S; m2 p+ X
5 W6 P# h% ]/ J' g) F; ?1 U- Q$ G% sFourth is another example of cherry-picking. In the same event, there are2 |1 J2 ^: T- {; p: f8 M
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
P. @9 m U5 E+ Ss) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
; K3 Y1 Y$ g5 G+ T0 J0 D), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
& R2 F6 H$ Z* O* V0 Aout, if we are just talking about the last 50 metres in a 400-metre IM,
! K2 d5 L0 e7 o8 m5 qLochter is not the example I would have used if I were the author. What kind
2 X3 I1 D% u9 b* Z r- ^/ Z( gof scientific rigorousness is Callaway trying to demonstrate here? Is it
~6 w7 k5 p" J; i( k% tlogical that if Lochter is the champion, we should assume that he leads in
6 `* p+ `' q! D: J. L! \every split? That would be a terrible way to teach the public how science
+ @* G, O9 ~1 p/ tworks.0 H% }! K5 U' N0 ~; G" n, C
$ w# P( u) G# lFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
! E, p% _1 S$ x4 j1 O/ _1 bimplies that a drug test cannot rule out the possibility of doping. Is this. d, w) @: b3 _$ j! ~, a' R
kind of agnosticism what Nature really wants to teach its readers? By that: U& g2 [! G* u+ Z( [
standard, I estimate that at least half of the peer-reviewed scientific
. O- S8 s/ L$ R5 qpapers in Nature should be retracted. How can one convince the editors and, U& K8 W4 q3 u0 T' y$ b$ x! j& P% W
reviewers that their proposed theory works for every possible case? One, ~3 g5 q( _" }, v# q$ s }( g
cannot. One chooses to apply the theory to typical examples and to7 _9 {7 Q0 h4 K" N- T, e
demonstrate that in (hopefully) all scenarios considered, the theory works" c7 l1 ?$ ]% s3 G3 _- O# d9 r
to a degree, and that that should warrant publication until a counterexample
4 r& r6 S5 Z* e" e; Xis found. I could imagine that Callaway has a sceptical mind, which is0 V. x8 ?5 b: @# D" B
crucial to scientific thinking, but that would be put to better use if he) a% P* C" G' \7 u/ ]6 C5 n M
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly9 }5 Y' n. q: a6 \
advanced, non-detectable drug that the Chinese have come up with in the
+ _0 T+ R& q. p- j& I* l+ g7 `, j, rpast 4 years (they obviously did not have it in Beijing, otherwise why not
5 B1 v0 ]# I8 }2 D& J1 g' Quse it and woo the audience at home?), based on data and rational derivation. A) |1 a/ _' P, v! c
. This article, however, can be interpreted as saying that all athletes are6 R, z1 q% x8 _, d# ~/ n
doping and the authorities are just not good enough to catch them. That may
+ F. f7 C( N% G& Z0 { @* Abe true, logically, but definitely will not make the case if there is ever a
& r1 Q2 c7 I5 d3 g; T% Ahearing by the governing body for water sports, FINA, to determine if Ye* Y/ O9 t" e( H0 h* C+ N
has doped. To ask whether it is possible to obtain a false negative in a
( L8 g4 ^' |: l E% J3 r% B" Bdrug test looks like a rigged question to me. Of course it is possible:
. e! q1 F5 @; i% r U% Y$ yother than the athlete taking a drug that the test is not designed to detect
# _ C% H( h% `8 D, anyone who has taken quantum 101 will tell you that everything is
) O0 H7 J( Z* b, `probabilistic in nature, and so there is a probability that the drug in an
! U+ @- c2 O7 b$ I/ e1 X, Cathlete’s system could tunnel out right at the moment of the test. A slight- w) b- Z- ?* ^2 M: q$ s
chance it may be, but should we disregard all test results because of it?
) d7 Z+ B2 D2 XLet’s be practical and reasonable, and accept that the World Anti-Doping
2 ?- a2 T4 } s6 _8 xagency (WADA) is competent at its job. Ye’s urine sample will be stored for
5 _' Z$ `0 C6 ~; U# R( c8 h9 g' B! jeight years after the contest for future testing as technology advances.
' I3 A7 T: }1 [% S+ q2 N bInnocent until proven guilty, shouldn’t it be?! p$ g$ Z7 C8 L( \
, V. N5 M# G# d8 ^7 z# jSixth, and the last point I would like to make, is that the out-of-
# n7 e9 u c* w6 ]: v# e$ g3 i* dcompetition drug test is already in effect, which Callaway failed to mention* ?2 M4 L* \( C$ s1 U
. As noted in the president of WADA’s press release, drug testing for0 t" P; v' G8 T
Olympians began at least six months before the opening of the London
/ S q4 M5 C( c+ s% OOlympics. Furthermore, 107 athletes have been banned from this Olympics for
1 o2 {/ m' D i( i) D5 cdoping. That may be the reason that “everyone will pass at the Olympic0 n+ K6 ^2 i4 d ~* j% C
games. Hardly anyone fails in competition testing” — those who did dope+ h' Q) d$ {* ~8 K0 E# T$ l) {$ y% D
have already been caught and sanctioned. Callaway is free to suggest that a
. V5 Z- Q \( X: T0 vplayer could have doped beforehand and fooled the test at the game, but this
( i9 d1 H4 b, H5 }possibility is certainly ruled out for Ye.
2 H& C8 a; w6 l) }
+ G& D5 K% {3 ~+ K1 F2 i& }Over all, even though Callaway did not falsify any data, he did (
6 G% T3 Z* `$ ^# i. Qintentionally or not) cherry-pick data that, in my view, are far too
. h- v* x, ~; S$ S* Wsuggestive to be fair and unbiased. If you want to cover a story of a6 y+ E, `" k& H/ A& w# O- z& u& e, c8 J4 l
suspected doping from a scientific point of view, be impartial and provide
7 d6 h% W! e1 } |5 e' H5 A5 O3 _all the facts for the reader to judge. You are entitled to your
- ]/ Q- k, Q' a ]8 iinterpretation of the facts, and the expression thereof in your piece,
K, B6 ?6 G4 p0 ^explicitly or otherwise, but showing only evidence that favours your
1 y7 B; R6 t. s/ _6 W9 wargument is hardly good science or journalism. Such an article in a journal
$ O. z" u" r7 }such as Nature is not an appropriate example of how scientific research or
" U$ @ s) D8 c3 F4 w- p7 g; {reporting should be done. |
|