 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 JIANG4 B4 Z* h3 V6 g+ i( I
如果是中国长大的,英语能到这种程度真是很不简单。: [& \3 ?5 T6 Q- g
( r) ~$ v4 }6 f, _
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
# E7 o0 k4 W2 `, T& y. ? D
" n) a( s( R( i# K KFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
' J4 R. s( h7 P5 X0 y3 y! j
8 v9 t9 T2 E$ V# l- z+ CIt is a shame to see Nature — which nearly all scientists, including myself. b* @/ ^$ M: E, L3 s) L
, regard as one of the most prestigious and influential physical-science# m* }* z4 h$ B1 L( Z* U& D, V
magazines — publish a thinly veiled biased article like this. Granted, this
, d+ J, h. B+ W9 }3 Iis not a peer-reviewed scientific article and did not go through the& G2 ~' F5 ?: ?, ^
scrutiny of picking referees. But to serve as a channel for the general
1 I0 }; A; M7 V# W/ C9 @populace to be in touch with and appreciate science, the authors and editors* q" s8 a; x9 R7 x! {
should at least present the readers with facts within the proper context,
/ W7 p3 T: g5 l1 n" |( Awhich they blatantly failed to do.# H. I2 u* v, s9 Y$ K
8 p3 C) n; c; m0 N ~: j
First, to identify Ye’s performance increase, Ewen Callaway compared her" y; H1 ^: x4 H$ v4 G
Olympic 400-metre IM time with her performance at the World Championships in t! J6 P' H# [3 W
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “: V, A! e1 R+ ]7 { U
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous' Y3 {" S0 \+ R+ T, ~6 c
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
! W8 a0 O l( q+ `7 O/ ?improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the; b7 W7 f! n% v
difference between the gold and silver medal, I see no reason for 5.38 s to
6 l& G- J% \2 Dbe treated as 7 s.( t) a. C/ B& V, e. m
; J2 h, O0 p, o7 ], X- B
Second, as previously pointed out, Ye is only 16 years old and her body is
' _% Q# n3 t3 I; i1 @0 mstill developing. Bettering oneself by 5 seconds over two years may seem
1 @5 [* i: Y1 B* P% Dimpossible for an adult swimmer, but it certainly happens among youngsters.9 C; r" H) h1 s5 u$ k
An interview with Australian gold medallist Ian Thorpe revealed that his 400! y0 c+ p- \3 O! l# y
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.# p" o" B# V$ g4 F
For regular people, including Callaway, it may be hard to imagine what an
4 V1 L. a' |: y, telite swimmer can achieve as he or she matures and undergoes scientific and: r! k) W5 x% z/ V1 @; S
persistent training. But jumping to the conclusion that it is “anomalous”
, }/ m& _# J6 }8 ~based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
2 B: U0 v, f& D
1 S7 M! y C+ ~) D/ i; dThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
h' J! D& g! M, X5 `example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in. @. Q& W! i# S3 W
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
j5 g& G$ V) T' {; she chose not to push himself too hard and to conserve his energy for later' x: L0 k1 [4 j. x3 i) J
events (whether this conforms to the Olympic spirit and the ‘use one’s
9 P* |3 T% v5 U3 M% v, G! Kbest efforts to win a match’ requirement that the Badminton World
# E- Z1 B% O$ i% q+ h1 _9 bFederation recently invoked to disqualify four badminton pairs is another. o) o' Q# t# C! {3 R3 J
topic worth discussing, though probably not in Nature). Ye, on the other
* D2 e! Z0 w* ]8 V! e }+ q) Thand, was trailing behind after the first 300 metres and relied on freestyle+ s v' \, p# U0 [/ {
, in which she has an edge, to win the race. Failing to mention this& m" S+ M U4 l& {& k$ h- {
strategic difference, as well as the fact that Lochte is 23.25 seconds
2 \; N; } ]* x/ N9 W/ jfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
7 p& \1 _, r! @9 r$ B1 _faster than the best man in the same sport, which sounds impossible. Putting
) C0 {( I" [5 @; A& z' W8 raside the gender argument, I believe this is still a leading question that
) _/ P1 `4 t/ R S7 V1 Ximplies to the reader that there is something fishy going on.
& J$ H6 S9 a" T& D: G: V1 [ h$ r+ C4 T
Fourth is another example of cherry-picking. In the same event, there are! a. h [8 @& o9 c
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
$ h3 \; N9 l% X3 d$ }s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s6 Q. D8 J9 X9 l( V
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
- t4 O2 L2 i9 p& Yout, if we are just talking about the last 50 metres in a 400-metre IM,6 u, U3 j# l6 w
Lochter is not the example I would have used if I were the author. What kind
/ R5 H' X: ^$ s! `6 rof scientific rigorousness is Callaway trying to demonstrate here? Is it
- D5 I. X* M! r6 Rlogical that if Lochter is the champion, we should assume that he leads in
5 q: C+ L" M! v6 e2 Hevery split? That would be a terrible way to teach the public how science0 H- F3 H; g9 I, K7 S, x; k4 t
works./ H3 b \& ~" E
4 L3 L! {* m- t2 G2 gFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
5 i9 v! a b3 Mimplies that a drug test cannot rule out the possibility of doping. Is this7 B3 A3 X5 R8 I2 q9 I
kind of agnosticism what Nature really wants to teach its readers? By that
1 _" @9 R* M- O4 p+ L ustandard, I estimate that at least half of the peer-reviewed scientific
8 b, G2 b0 q* _papers in Nature should be retracted. How can one convince the editors and* ]! U f' L( k, I) }
reviewers that their proposed theory works for every possible case? One) n" k! @# S/ B
cannot. One chooses to apply the theory to typical examples and to
. g ?( I+ d- Rdemonstrate that in (hopefully) all scenarios considered, the theory works8 s, x- e" J! q( g
to a degree, and that that should warrant publication until a counterexample
5 j# z0 {. @/ F. Nis found. I could imagine that Callaway has a sceptical mind, which is5 C, i! z2 y3 \: V& R- |
crucial to scientific thinking, but that would be put to better use if he" C' T& R) L- Y1 x1 K
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly9 I- N7 z, O+ q: _; c
advanced, non-detectable drug that the Chinese have come up with in the
/ Q) ~9 l `$ Y& d" Lpast 4 years (they obviously did not have it in Beijing, otherwise why not
6 ~0 C( s6 v( ~/ X0 P3 Luse it and woo the audience at home?), based on data and rational derivation
- `0 }, ^6 l* Q; I1 B. This article, however, can be interpreted as saying that all athletes are
1 B" y$ d$ X5 h+ mdoping and the authorities are just not good enough to catch them. That may4 _: r$ A. r" I$ h( h
be true, logically, but definitely will not make the case if there is ever a3 S4 K2 ?& d- u9 _
hearing by the governing body for water sports, FINA, to determine if Ye9 Y# s! s: ?. E& F+ o9 u
has doped. To ask whether it is possible to obtain a false negative in a, @4 w7 F: f$ l1 S: y
drug test looks like a rigged question to me. Of course it is possible:" B* W# R7 o M' r- A7 P$ Y
other than the athlete taking a drug that the test is not designed to detect
0 F, g5 M, i0 Z, anyone who has taken quantum 101 will tell you that everything is
2 V. M) e- P$ R5 [8 U: tprobabilistic in nature, and so there is a probability that the drug in an8 z) m4 L+ I7 }
athlete’s system could tunnel out right at the moment of the test. A slight6 N# U7 ~: A* }# a
chance it may be, but should we disregard all test results because of it?
! `. L1 y3 I5 M3 F% ULet’s be practical and reasonable, and accept that the World Anti-Doping' Z. h0 a6 t. \, g+ C) H
agency (WADA) is competent at its job. Ye’s urine sample will be stored for" C- W" K- S$ e1 S3 o( K
eight years after the contest for future testing as technology advances.% }# s" u2 n* W7 a# A3 \/ K
Innocent until proven guilty, shouldn’t it be?
4 l- v. D# | A+ {. V3 \9 s' S# O8 K. |
Sixth, and the last point I would like to make, is that the out-of-3 f8 w9 E; o' g; T
competition drug test is already in effect, which Callaway failed to mention2 |& |6 e* Q/ i& r+ ^- \/ a/ V
. As noted in the president of WADA’s press release, drug testing for
. u" ~% A) O% eOlympians began at least six months before the opening of the London6 Y. G6 ^* a* r1 n
Olympics. Furthermore, 107 athletes have been banned from this Olympics for2 v7 [5 r0 ~, s4 Y' B! Y
doping. That may be the reason that “everyone will pass at the Olympic
' j' T- m6 B/ Egames. Hardly anyone fails in competition testing” — those who did dope6 o. |) E: n. L+ p
have already been caught and sanctioned. Callaway is free to suggest that a
9 Y7 ^: m# F8 d6 g8 mplayer could have doped beforehand and fooled the test at the game, but this2 s, }& D. T# D- r2 d# M
possibility is certainly ruled out for Ye.
" `/ t6 X1 R9 I3 s1 E7 y( I r& ~$ E) w& f
Over all, even though Callaway did not falsify any data, he did (
0 [& v8 d G% I7 ~1 o7 vintentionally or not) cherry-pick data that, in my view, are far too
) {0 b# s9 s/ l1 Y6 q8 v! {suggestive to be fair and unbiased. If you want to cover a story of a
$ G+ s' G4 M4 V) X' Y+ bsuspected doping from a scientific point of view, be impartial and provide
4 y: H3 v1 B l1 D) h) j' @7 G" j6 mall the facts for the reader to judge. You are entitled to your
) Y; H5 J2 u, I8 |, Tinterpretation of the facts, and the expression thereof in your piece,5 |$ I- e5 c0 i- d
explicitly or otherwise, but showing only evidence that favours your9 Z- t& z1 A! a; @/ ~0 m6 \
argument is hardly good science or journalism. Such an article in a journal
2 M: F: R3 U% Q4 Psuch as Nature is not an appropriate example of how scientific research or4 p0 ^: I6 I. ] q
reporting should be done. |
|