 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) N2 n) D5 x1 X" h
如果是中国长大的,英语能到这种程度真是很不简单。; j* o, x B' ^) G, T i
# G$ ?) j2 q# W9 f8 bhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
( M B& R$ P; w8 U8 Y" C$ {9 d1 t& _8 |# n* I8 d
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
/ i) ^. ~) }& t5 y3 P) [) G
' n S* e- A; P b4 _" C7 NIt is a shame to see Nature — which nearly all scientists, including myself
. `+ h7 z$ X- {3 e8 ], t/ l3 v, regard as one of the most prestigious and influential physical-science
5 G/ F8 B8 Y d5 [7 q2 m* Ymagazines — publish a thinly veiled biased article like this. Granted, this
* B( x. F/ O6 x. \is not a peer-reviewed scientific article and did not go through the
B5 e8 v/ s" {) Sscrutiny of picking referees. But to serve as a channel for the general3 \" i4 [( P3 F3 o+ e$ b A8 N
populace to be in touch with and appreciate science, the authors and editors$ X# u7 O0 m4 S0 M! D, b1 V; U5 I
should at least present the readers with facts within the proper context,% e1 K$ z/ @6 ]) P; F0 X
which they blatantly failed to do.
; s. G; g& G' ?) ]" X) m. a
* ~8 g V, N0 qFirst, to identify Ye’s performance increase, Ewen Callaway compared her
' e/ \0 m+ W* H# nOlympic 400-metre IM time with her performance at the World Championships in. u, H! o( r O6 q! m
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “4 ~7 P% T; B: Y i: A7 y
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous) [! D4 h( J- F# ~. v
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
: }0 n. O$ ]- ~* I3 zimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the" y% l x* V8 O- |4 k9 L
difference between the gold and silver medal, I see no reason for 5.38 s to& l/ y0 `* h1 u8 ^9 i, J( U
be treated as 7 s.
% I7 `. J9 t% c, d: F3 u" W7 `$ b6 v
2 j% x" L, i4 o1 H1 S* I% QSecond, as previously pointed out, Ye is only 16 years old and her body is
/ I& W# M$ n+ B% E# V) p/ S$ ~2 C5 zstill developing. Bettering oneself by 5 seconds over two years may seem6 ]+ b r; r9 n3 x8 E% j
impossible for an adult swimmer, but it certainly happens among youngsters.$ L; \- Y! a+ }7 y5 x
An interview with Australian gold medallist Ian Thorpe revealed that his 400: q1 s4 |6 m5 B$ m- s$ n
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
1 m: I( r' y3 ~4 rFor regular people, including Callaway, it may be hard to imagine what an+ h) |3 j' o; R5 A! T8 G1 i
elite swimmer can achieve as he or she matures and undergoes scientific and
/ J$ h$ G8 V2 a* Kpersistent training. But jumping to the conclusion that it is “anomalous”
5 Z) ^5 ^3 p7 f" Q% ]0 s/ gbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.# a2 q/ \4 u9 l# Z% e* {9 U
# a3 X# X3 e( C" b
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
" d5 y. R1 L1 V1 r Zexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in; E: [6 p+ k: m6 ?8 [% S
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so+ b& b6 S# {/ E0 w9 T
he chose not to push himself too hard and to conserve his energy for later+ @! }5 Y" a$ J
events (whether this conforms to the Olympic spirit and the ‘use one’s9 Y! O7 s7 x! j4 f
best efforts to win a match’ requirement that the Badminton World+ T2 ]) S; n! U" d, d
Federation recently invoked to disqualify four badminton pairs is another
% H+ F/ v/ g# m E; F2 [topic worth discussing, though probably not in Nature). Ye, on the other
$ y3 \: \( w$ y% k6 @/ {hand, was trailing behind after the first 300 metres and relied on freestyle
. r* Y+ M4 B: Y* U, t- T( N, J* i0 j4 o, in which she has an edge, to win the race. Failing to mention this
7 l" T6 ^( d: M- g9 L! j, `strategic difference, as well as the fact that Lochte is 23.25 seconds" S2 |6 y5 L9 p. L4 x7 p/ k$ h2 V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 N+ Q0 R! v% W. x! O# `faster than the best man in the same sport, which sounds impossible. Putting
0 B; B( [, y1 G+ Baside the gender argument, I believe this is still a leading question that
: s+ W/ R( @0 _$ Jimplies to the reader that there is something fishy going on.
% S9 O3 {+ H, j" k# i9 S
3 g6 r3 l8 I# ^ c! A+ x1 F4 k0 vFourth is another example of cherry-picking. In the same event, there are
! S$ {' W0 J4 s$ ] tfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93+ A) m) b4 T7 v0 \6 `
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 A$ k/ z& n' I2 y), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
7 K1 V( K! V4 U; }out, if we are just talking about the last 50 metres in a 400-metre IM,. Q! I1 f& i- R( b- m/ {% a% O3 W) @5 N
Lochter is not the example I would have used if I were the author. What kind A9 {, y- `9 Y- Q, G- L
of scientific rigorousness is Callaway trying to demonstrate here? Is it
/ ?3 h p- |& E+ s5 j) V9 {logical that if Lochter is the champion, we should assume that he leads in* \; z2 L+ _4 V+ ^, r3 m
every split? That would be a terrible way to teach the public how science
: A2 P5 ?( K. c" `works.
- @9 \, d% C; Q2 x% L
5 L' {# U4 a3 M& H# wFifth is the issue I oppose the most. Callaway quotes Ross Tucker and! ^% I0 F$ z& i. w! ]% f
implies that a drug test cannot rule out the possibility of doping. Is this+ H' n% |: @6 J
kind of agnosticism what Nature really wants to teach its readers? By that
/ N9 a* T& c9 h# ]* O( O0 Hstandard, I estimate that at least half of the peer-reviewed scientific6 J" |5 F r) v$ D
papers in Nature should be retracted. How can one convince the editors and3 A, A. A; e7 c1 q& b
reviewers that their proposed theory works for every possible case? One
# W, D; z( s' \cannot. One chooses to apply the theory to typical examples and to
, _9 t0 K1 Q1 j* O! f# t. K2 O! {7 Rdemonstrate that in (hopefully) all scenarios considered, the theory works
; q" U1 b* M- Q; h4 |/ |to a degree, and that that should warrant publication until a counterexample- v) t9 A5 Z6 F& J
is found. I could imagine that Callaway has a sceptical mind, which is
, Z* ]9 x- |' H acrucial to scientific thinking, but that would be put to better use if he4 X( z( k7 d: t* O- o/ n
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
5 a# e) D- |3 f3 b+ J& p7 _advanced, non-detectable drug that the Chinese have come up with in the3 t6 y* ?7 Z+ |1 {8 L* S4 M
past 4 years (they obviously did not have it in Beijing, otherwise why not
2 R: v7 v, Y/ y4 ~use it and woo the audience at home?), based on data and rational derivation
" w9 ^0 i$ f' n+ k0 j8 |! v; @1 E. This article, however, can be interpreted as saying that all athletes are
' M6 u- ~. }' |" u1 Z/ Wdoping and the authorities are just not good enough to catch them. That may9 Z# @3 p1 t& p2 d! W. s
be true, logically, but definitely will not make the case if there is ever a& f6 d! A- I3 B5 l
hearing by the governing body for water sports, FINA, to determine if Ye6 p9 V# e2 a# d. U }
has doped. To ask whether it is possible to obtain a false negative in a2 p- E0 n0 O* H* w$ Z0 l
drug test looks like a rigged question to me. Of course it is possible:
6 |" Y( I0 X0 Q# f- i6 B8 S8 cother than the athlete taking a drug that the test is not designed to detect9 n3 N- P1 R) _: w
, anyone who has taken quantum 101 will tell you that everything is6 Q3 g# a( l. v! z: Z& C5 g6 O: r
probabilistic in nature, and so there is a probability that the drug in an
* @+ e1 O1 j% J% Q' H( o5 N6 ?athlete’s system could tunnel out right at the moment of the test. A slight; ~. Q: J, H9 [6 y s
chance it may be, but should we disregard all test results because of it?4 {, l0 ]# d3 s
Let’s be practical and reasonable, and accept that the World Anti-Doping
: `% Y0 u+ [2 E& Gagency (WADA) is competent at its job. Ye’s urine sample will be stored for
' h. \# o( n$ O5 n9 ]# \+ u- V4 peight years after the contest for future testing as technology advances.
9 ?: ?' t# d3 j5 Q0 }4 Y% X. cInnocent until proven guilty, shouldn’t it be?
; {' k: Y [' l& Y2 W& m5 L3 d) U
) ]3 z" x& f ?$ K% f# H* z! xSixth, and the last point I would like to make, is that the out-of-) u3 J9 U0 X% z& s
competition drug test is already in effect, which Callaway failed to mention
5 n! q0 A8 h7 o1 y$ T; ~4 Q. As noted in the president of WADA’s press release, drug testing for
. g5 D+ X. ~( Z( gOlympians began at least six months before the opening of the London3 b k4 s6 }+ i5 Z* B' u* W. |" X
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
& `/ h( ^) I; {1 j: N3 O* Ddoping. That may be the reason that “everyone will pass at the Olympic& z! Z$ C5 Q/ m4 k2 [3 X4 q2 Y
games. Hardly anyone fails in competition testing” — those who did dope0 h8 L, r$ E8 p, b. r
have already been caught and sanctioned. Callaway is free to suggest that a0 v8 ^7 [% r4 A! ~3 o1 {% `' g
player could have doped beforehand and fooled the test at the game, but this
5 d+ G$ d! c# R& ]/ Epossibility is certainly ruled out for Ye.4 ?0 B# C. \. s6 m- o& q9 |
0 h1 p( D' w K t. O* U" j, d* @Over all, even though Callaway did not falsify any data, he did (
: @) a& Y* w! B0 e6 G8 qintentionally or not) cherry-pick data that, in my view, are far too/ R, Y/ S1 a1 M( I. U8 ^8 S% r
suggestive to be fair and unbiased. If you want to cover a story of a
" J# ~9 P7 c, q' ssuspected doping from a scientific point of view, be impartial and provide
7 `: g) T4 ~- n( Xall the facts for the reader to judge. You are entitled to your2 Y2 @( H1 V. d: g v
interpretation of the facts, and the expression thereof in your piece,4 U+ r9 N5 r& n& }
explicitly or otherwise, but showing only evidence that favours your8 L4 S0 a1 k& R' I$ Q! ?' S4 |
argument is hardly good science or journalism. Such an article in a journal. S/ r6 l' ?0 D5 |0 o
such as Nature is not an appropriate example of how scientific research or- ?' A4 e2 y. K/ Z
reporting should be done. |
|