 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- y/ X$ c) G/ Y5 Q1 W; V
如果是中国长大的,英语能到这种程度真是很不简单。5 N4 c8 m7 g* X; t9 l0 F9 {
7 D; a, B, X6 S! b3 o4 Ehttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
6 Y& V# Q' k/ z- f
2 X! ~# v$ ^! \8 W5 I" {FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
! W! T6 N% ]6 P# E2 I p( Z
" _9 k+ z+ T7 U: o0 P" u- u# [It is a shame to see Nature — which nearly all scientists, including myself4 v2 e7 W, x. ^* t9 `6 E3 m/ X1 o
, regard as one of the most prestigious and influential physical-science3 P) K/ f- D" Z4 V2 W
magazines — publish a thinly veiled biased article like this. Granted, this" W) M M* |2 U9 ?8 y% v H8 v
is not a peer-reviewed scientific article and did not go through the
) P+ d! m- P1 Nscrutiny of picking referees. But to serve as a channel for the general
# p. \: g9 G+ }populace to be in touch with and appreciate science, the authors and editors2 O9 N; A; D2 N# H: C) V8 b
should at least present the readers with facts within the proper context,
% X! ?; _* h) J3 @! dwhich they blatantly failed to do.: k: Z9 F6 _. x; L `" {" w2 ?! M
8 i8 U* T9 n4 S1 ^; l3 ~
First, to identify Ye’s performance increase, Ewen Callaway compared her
b0 F- B' F5 @0 M |Olympic 400-metre IM time with her performance at the World Championships in
9 o& n$ L' u1 Q E2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ A4 E6 X0 b3 F& Y
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous0 z4 p3 d% X {2 q9 `2 m1 P
personal best was 4:33.79 at the Asian Games in 2010. This leads to an0 Q# q& W( K( S4 x+ [6 P
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the* I! J2 I+ i( c- ^2 v6 m6 r
difference between the gold and silver medal, I see no reason for 5.38 s to
1 J3 Y7 C2 K, k7 U/ {2 e: Y ibe treated as 7 s.3 G1 o4 Z2 _1 q3 v7 V' M
9 x. G0 `9 h0 G4 \1 n( @) y3 E; @
Second, as previously pointed out, Ye is only 16 years old and her body is
7 p% j1 h8 w9 p& m7 sstill developing. Bettering oneself by 5 seconds over two years may seem
3 o' A0 H& c1 o, f' T" dimpossible for an adult swimmer, but it certainly happens among youngsters.6 H1 e! d5 I& }( A5 K
An interview with Australian gold medallist Ian Thorpe revealed that his 400
' N ]# t, U* ~6 u; L/ k( E2 a-metre freestyle time improved by 5 seconds between the ages of 15 and 16.0 W* U2 c. `" l. x( O9 E0 k' f7 ]8 P
For regular people, including Callaway, it may be hard to imagine what an
& N9 B0 G7 k% \3 zelite swimmer can achieve as he or she matures and undergoes scientific and( ]) B3 t, C, {2 J+ A
persistent training. But jumping to the conclusion that it is “anomalous”) w' ^- E7 k2 Q8 Q H! \
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound., W" @6 B$ n; j9 {6 M* n2 D
2 b. U0 ^. R6 \: u9 H0 ]0 @5 K
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook! S2 k1 L, v. }, Q# [7 Q, e* U
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in% x6 o8 w; ?1 H
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so- z+ l0 m; B/ k }- v
he chose not to push himself too hard and to conserve his energy for later
# F, Y$ a0 k+ E0 h# Devents (whether this conforms to the Olympic spirit and the ‘use one’s% H( a5 _3 \8 O: l3 n! n& U
best efforts to win a match’ requirement that the Badminton World E$ f8 f0 X* A- }+ w0 P
Federation recently invoked to disqualify four badminton pairs is another7 `$ N1 ?; \* X8 c; l+ B' a
topic worth discussing, though probably not in Nature). Ye, on the other9 i ] C6 U- q
hand, was trailing behind after the first 300 metres and relied on freestyle7 H* ~% \' I* K, E
, in which she has an edge, to win the race. Failing to mention this0 G. G4 H6 t, s C/ ?; N1 G6 u' t" l& Z: Z
strategic difference, as well as the fact that Lochte is 23.25 seconds6 O' T3 y! G* F! Q$ C( T) {! Z/ d8 n
faster (4:05.18) than Ye overall, creates the illusion that a woman swam$ ^: h- @3 F/ y& |
faster than the best man in the same sport, which sounds impossible. Putting
0 Y' }% V6 E' Q3 i9 Q* g9 laside the gender argument, I believe this is still a leading question that
, o# j- m. L( u5 u# _implies to the reader that there is something fishy going on.
# |# X' [3 Y. a3 q6 ~3 C/ `& t: G1 T7 i8 e3 l
Fourth is another example of cherry-picking. In the same event, there are
6 f& ~$ f( r3 H" g. pfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
9 u' K9 `. q- Es) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& A4 U1 [. l- B5 M* u6 k! u
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
" I: F6 T! ^5 o: A# Dout, if we are just talking about the last 50 metres in a 400-metre IM,. B- Y' ^( k, {9 c# `
Lochter is not the example I would have used if I were the author. What kind8 r2 ~" O3 |2 o% {9 I. o, z* n, |
of scientific rigorousness is Callaway trying to demonstrate here? Is it+ B z: J! s$ X: s' S1 T1 S
logical that if Lochter is the champion, we should assume that he leads in
* Z. k1 Q) g) `1 U, J- B$ U' c3 Xevery split? That would be a terrible way to teach the public how science
% \5 V' h! h- E, z# z, nworks.5 p; m, y2 w$ L7 m" }
: i( ~3 D0 |* e0 S0 z, c
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and6 p% i& q' Q5 ~0 O( P
implies that a drug test cannot rule out the possibility of doping. Is this
" u, Y- g& k) u4 e2 ]( n3 R0 j zkind of agnosticism what Nature really wants to teach its readers? By that
. z+ K8 j1 A- x$ q7 n$ vstandard, I estimate that at least half of the peer-reviewed scientific
6 w* D, ~5 b) t6 O. c9 `papers in Nature should be retracted. How can one convince the editors and3 ^7 O4 ~& N1 D* u
reviewers that their proposed theory works for every possible case? One) I3 I9 }8 X3 J: u0 M
cannot. One chooses to apply the theory to typical examples and to
5 R( a# d0 ?; N; @, ldemonstrate that in (hopefully) all scenarios considered, the theory works
t4 p5 H2 Z! M0 b# w. }to a degree, and that that should warrant publication until a counterexample
2 i( F' f; `. r" t* Mis found. I could imagine that Callaway has a sceptical mind, which is
6 V7 x' A- r8 A' Acrucial to scientific thinking, but that would be put to better use if he$ e3 o a6 ^" L4 G& X
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
) j. e2 D% T8 R. i& }, yadvanced, non-detectable drug that the Chinese have come up with in the) s$ P" x: u' Q' r
past 4 years (they obviously did not have it in Beijing, otherwise why not, O! E( p/ I1 }. J9 v' }- ?
use it and woo the audience at home?), based on data and rational derivation+ H& f9 M8 H) ~4 C) ^
. This article, however, can be interpreted as saying that all athletes are
% j# h- W9 C4 J2 D. a' Z4 @2 `6 Odoping and the authorities are just not good enough to catch them. That may' o0 u) d1 ^& x( j9 E$ y: I
be true, logically, but definitely will not make the case if there is ever a! C" O2 u: D$ n( R+ U
hearing by the governing body for water sports, FINA, to determine if Ye! Q' H7 U! X2 N. E$ {0 R
has doped. To ask whether it is possible to obtain a false negative in a
- G p2 ^5 P: s5 i/ Z$ Y4 pdrug test looks like a rigged question to me. Of course it is possible:8 W3 O7 \! a' T" h7 G+ O1 T) ~, f
other than the athlete taking a drug that the test is not designed to detect* D1 m4 @$ }9 c
, anyone who has taken quantum 101 will tell you that everything is
7 n6 r/ i% K0 \+ W' i) K Hprobabilistic in nature, and so there is a probability that the drug in an
7 B8 l/ s t1 B# _& B* O9 v3 P0 Aathlete’s system could tunnel out right at the moment of the test. A slight
- J/ f6 r' Q+ g- E# I" ichance it may be, but should we disregard all test results because of it?
) I3 Z! Z0 q1 M9 l+ ELet’s be practical and reasonable, and accept that the World Anti-Doping
& U5 o6 U: l, I" hagency (WADA) is competent at its job. Ye’s urine sample will be stored for
. u' L* E9 u( m4 f @ m( Height years after the contest for future testing as technology advances.( z/ q6 e( R2 _. s! m0 R" ?6 M
Innocent until proven guilty, shouldn’t it be?
8 I4 O) V+ I7 U, p: \1 \" ^
# H" b' a5 n6 G3 J; ySixth, and the last point I would like to make, is that the out-of-# O6 G, [" P- }4 _2 c; X. a! N
competition drug test is already in effect, which Callaway failed to mention
& q4 |3 ]2 Q6 c5 i! I7 b. As noted in the president of WADA’s press release, drug testing for
# q6 |: K& d( S) _; mOlympians began at least six months before the opening of the London$ `7 F* Q0 [( W8 o" W) Z
Olympics. Furthermore, 107 athletes have been banned from this Olympics for8 g) K$ N/ q: ]
doping. That may be the reason that “everyone will pass at the Olympic
& e8 v3 k. `! V) y2 P, Z9 z* Wgames. Hardly anyone fails in competition testing” — those who did dope
* K$ x& o4 g) ?2 Y+ Ghave already been caught and sanctioned. Callaway is free to suggest that a1 K$ p5 i2 X. }
player could have doped beforehand and fooled the test at the game, but this
, n& N* e+ u+ R8 |possibility is certainly ruled out for Ye.
: D/ Y! Y; \# d5 S3 @
6 _* q e" P0 ^- d6 MOver all, even though Callaway did not falsify any data, he did (
/ X5 |; t+ c+ v8 s" M1 r: _6 Bintentionally or not) cherry-pick data that, in my view, are far too& \8 F# q& I! [/ c F2 q
suggestive to be fair and unbiased. If you want to cover a story of a
# R, c6 n1 \: _' k" ~suspected doping from a scientific point of view, be impartial and provide
# L7 k1 T. _2 mall the facts for the reader to judge. You are entitled to your
O! E) f' h7 _3 [" p0 ginterpretation of the facts, and the expression thereof in your piece,
$ R* n5 l% l; u7 s' v5 kexplicitly or otherwise, but showing only evidence that favours your
% D! M3 f7 z2 Gargument is hardly good science or journalism. Such an article in a journal" D8 O; K( n! L f! p7 N
such as Nature is not an appropriate example of how scientific research or
8 s4 K9 Z+ g7 ]1 ?& creporting should be done. |
|