 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
5 z4 i% d( s4 F! ?; Y. F如果是中国长大的,英语能到这种程度真是很不简单。. f! l6 O, [* F" n
6 j0 }3 o$ }/ f+ w
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
) Y( L4 ~! }' g% z
! p* Z) n+ c5 }( W4 [0 V" VFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
- N- I" I; l) ?4 `2 ?8 O# a; V" b4 Y
5 x# l: l# d+ ]) ?. ?2 I# O+ jIt is a shame to see Nature — which nearly all scientists, including myself
+ l- N$ b! e! `, G V6 e, regard as one of the most prestigious and influential physical-science
1 E3 k( ~$ i0 R7 b6 o: _6 [, cmagazines — publish a thinly veiled biased article like this. Granted, this$ O0 f [& h: X& }/ X1 u3 y: r
is not a peer-reviewed scientific article and did not go through the7 y- Y. P" D, Q
scrutiny of picking referees. But to serve as a channel for the general
, A" r- H% r# P7 Q; O* rpopulace to be in touch with and appreciate science, the authors and editors! }- l0 ~4 q x
should at least present the readers with facts within the proper context,
5 @0 E- Y* o* E" @2 N% B: d) c. _- Nwhich they blatantly failed to do. p8 P* J) ?/ C4 e7 r0 w ?. Z
o* R+ G+ o) W/ a1 m* z" U! d
First, to identify Ye’s performance increase, Ewen Callaway compared her1 Q( b' _( s3 w- m
Olympic 400-metre IM time with her performance at the World Championships in
, L; S s9 d/ l. p2 B: X/ E2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “) E C8 D% z D
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
) B0 z. P) S7 D7 | z& d7 W) q- Dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
( H _0 {% |) himprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
8 u9 n. F! E+ J3 p Ldifference between the gold and silver medal, I see no reason for 5.38 s to
9 `- f" A4 @, S# E' @& {be treated as 7 s.5 }1 \3 _- b' s0 H' a2 T1 v
, N% M# n: Q# DSecond, as previously pointed out, Ye is only 16 years old and her body is- \( h! a0 l! V6 \8 o4 F! D
still developing. Bettering oneself by 5 seconds over two years may seem9 @$ u, ^# N+ S
impossible for an adult swimmer, but it certainly happens among youngsters./ \* u* W$ j0 J6 n( ?/ v; N( [
An interview with Australian gold medallist Ian Thorpe revealed that his 400- A, c! x) T) i3 z
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.- B5 `5 z% {: o- u, k, h D
For regular people, including Callaway, it may be hard to imagine what an
# K0 K, e1 v, j6 c- celite swimmer can achieve as he or she matures and undergoes scientific and+ j: q! o! w. U5 w% d- j, p3 q
persistent training. But jumping to the conclusion that it is “anomalous”
' X& I* [, ]3 Z+ p9 e d* \, `based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
% i: B- z5 z& @1 ~+ X! H
: s, k- g( e. H! R- I; j; n7 KThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook0 n* l) _. f: s. t' l
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in2 k6 h; ?- w: Y' H U U& v
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so9 j" t9 l0 M3 E+ a6 d
he chose not to push himself too hard and to conserve his energy for later
+ q7 T9 f3 K j+ Y9 V7 K& @events (whether this conforms to the Olympic spirit and the ‘use one’s& w) E+ @; q1 R } {9 d) b
best efforts to win a match’ requirement that the Badminton World4 Q; j# Y3 E3 S# {5 P4 Z* t
Federation recently invoked to disqualify four badminton pairs is another. M0 |# `' w1 Y9 e; |# @; P. T
topic worth discussing, though probably not in Nature). Ye, on the other
' R; ?9 N, |' x' ~hand, was trailing behind after the first 300 metres and relied on freestyle( m, H) b# Y( D- P' ?/ U
, in which she has an edge, to win the race. Failing to mention this! {! m& N7 h: b }% p% K1 H
strategic difference, as well as the fact that Lochte is 23.25 seconds
8 P0 T# `" J: n6 u1 x8 a% t6 z; [faster (4:05.18) than Ye overall, creates the illusion that a woman swam4 a/ y& @* R3 d1 ~5 [5 r7 z. `
faster than the best man in the same sport, which sounds impossible. Putting
! R- w: h( u3 e. x6 @( O% caside the gender argument, I believe this is still a leading question that
' l- Z, N! i% K) Uimplies to the reader that there is something fishy going on.
\# B4 C7 v4 A/ A
% X2 S% v, n6 x1 l8 _Fourth is another example of cherry-picking. In the same event, there are' }* G' G2 v V6 F' \- k0 d
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.930 a( n% r, N" X0 |% }5 c( g
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s$ ^+ w+ P- R$ A
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns( V7 M# H9 N6 l: ^
out, if we are just talking about the last 50 metres in a 400-metre IM,
3 J% n0 @ T. R, lLochter is not the example I would have used if I were the author. What kind
. i4 c @( g. @of scientific rigorousness is Callaway trying to demonstrate here? Is it: X6 o5 i7 M& e) b' K1 Z
logical that if Lochter is the champion, we should assume that he leads in
* e* n, }; _0 Qevery split? That would be a terrible way to teach the public how science# G' q* \9 J" F3 o
works.3 v. p" k. Q" I3 }( W
1 O7 D% i. J4 {9 i) y& b
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
5 g* b4 p$ t5 T) l* O limplies that a drug test cannot rule out the possibility of doping. Is this
8 y' T4 y3 G0 j$ Kkind of agnosticism what Nature really wants to teach its readers? By that. v! h& v; I+ z g! r" Y
standard, I estimate that at least half of the peer-reviewed scientific! u4 \3 e% X: T. D4 ~
papers in Nature should be retracted. How can one convince the editors and
9 g) C: X; n6 W5 |1 Yreviewers that their proposed theory works for every possible case? One
, e" V( \1 z3 I% X+ J1 lcannot. One chooses to apply the theory to typical examples and to
2 M$ V2 y. O# U. cdemonstrate that in (hopefully) all scenarios considered, the theory works U+ l1 V* o4 o" Y6 S
to a degree, and that that should warrant publication until a counterexample
( e1 W) E) x! Y( Kis found. I could imagine that Callaway has a sceptical mind, which is
5 e F( {( |0 m7 w3 e- pcrucial to scientific thinking, but that would be put to better use if he
1 R! N2 }! p, h' e8 t2 G; [wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
& ?+ r1 w7 u5 A4 ?advanced, non-detectable drug that the Chinese have come up with in the5 w1 q, ?: D# `- A5 q
past 4 years (they obviously did not have it in Beijing, otherwise why not
+ S. l3 u0 p- B( Q: L( o" v2 ~& duse it and woo the audience at home?), based on data and rational derivation
" J+ O, d7 Z* K. B. This article, however, can be interpreted as saying that all athletes are
4 h9 E3 N5 b2 N+ G( Idoping and the authorities are just not good enough to catch them. That may* N/ w- d5 q: n
be true, logically, but definitely will not make the case if there is ever a
5 F `6 @! D" u+ Q8 e4 Uhearing by the governing body for water sports, FINA, to determine if Ye5 v% l3 D3 n: c; u# s. T5 J' S
has doped. To ask whether it is possible to obtain a false negative in a
5 J8 S: j o. x6 {8 z$ X- f, O* Mdrug test looks like a rigged question to me. Of course it is possible:% T* k9 M; O3 C" H$ C9 D0 _
other than the athlete taking a drug that the test is not designed to detect
0 ?) k7 z2 o0 x6 |$ E. J, anyone who has taken quantum 101 will tell you that everything is& ^6 \) @/ v; g' z+ \, Q& L; b8 r) y
probabilistic in nature, and so there is a probability that the drug in an
: K6 A" v/ R' h2 N1 g, ^athlete’s system could tunnel out right at the moment of the test. A slight" c( M0 l$ h _' b
chance it may be, but should we disregard all test results because of it?
9 {- E/ [6 T# b- BLet’s be practical and reasonable, and accept that the World Anti-Doping) I( \1 S% X' O- j- C2 s. s
agency (WADA) is competent at its job. Ye’s urine sample will be stored for) R7 |8 `/ d, e
eight years after the contest for future testing as technology advances.
1 H6 w% O, U' y; u8 I) AInnocent until proven guilty, shouldn’t it be?
# B& ^8 J7 B# e
! ^: O! q9 \$ ]# ~4 }5 mSixth, and the last point I would like to make, is that the out-of-( I% c( F+ A+ I7 B5 o' V
competition drug test is already in effect, which Callaway failed to mention
* B" m; S6 Y/ h% Q. As noted in the president of WADA’s press release, drug testing for: H- X/ r% u+ @9 D
Olympians began at least six months before the opening of the London
0 _9 q, _' t; w" R: J% {" C$ Y4 h8 lOlympics. Furthermore, 107 athletes have been banned from this Olympics for
9 o; D! ?) K Edoping. That may be the reason that “everyone will pass at the Olympic
- u8 V0 g3 y! h+ k. o! F7 Xgames. Hardly anyone fails in competition testing” — those who did dope/ n1 J( C7 f. \6 C4 u( i. ?
have already been caught and sanctioned. Callaway is free to suggest that a
! O7 k5 D( v3 r+ M; Cplayer could have doped beforehand and fooled the test at the game, but this
" `3 Y9 v( R9 l; w/ q; H1 `5 Tpossibility is certainly ruled out for Ye.8 D& r0 U( D4 g8 `- y( r
$ s; I) s ]4 q& d! R7 a
Over all, even though Callaway did not falsify any data, he did (( a- T' i$ \& [8 I+ A
intentionally or not) cherry-pick data that, in my view, are far too1 n* A% E. `" U! T
suggestive to be fair and unbiased. If you want to cover a story of a2 E7 H# P: n2 ^
suspected doping from a scientific point of view, be impartial and provide
. `- a( H& o3 P9 l. ]' tall the facts for the reader to judge. You are entitled to your! p. N6 S( u' N* W' s8 k% J
interpretation of the facts, and the expression thereof in your piece,
2 s+ j# a% {# I7 P+ O% S0 E( Pexplicitly or otherwise, but showing only evidence that favours your
& W( w( a& h8 D6 E/ ] C* Kargument is hardly good science or journalism. Such an article in a journal
0 s( c1 p: y5 Asuch as Nature is not an appropriate example of how scientific research or
4 H; G* S0 J9 A( ^& A5 c4 Vreporting should be done. |
|