 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 JIANG2 F/ o; ?' }, f3 S6 @, k
如果是中国长大的,英语能到这种程度真是很不简单。! @- Q+ T/ J: u Z( x. G- L
+ V" c# e# r& I7 g' Phttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
+ |/ N- K9 t h1 }+ Q Q3 T& g' A' r6 f
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania1 c# O% s# G- `9 M
- B4 l, H, y8 Y2 P2 [8 a8 f' ~, ?4 J
It is a shame to see Nature — which nearly all scientists, including myself& C2 Y- Y4 L0 Y2 n3 L. w: r# }
, regard as one of the most prestigious and influential physical-science& s: j+ Q5 L, a
magazines — publish a thinly veiled biased article like this. Granted, this
" L! _( r5 G- cis not a peer-reviewed scientific article and did not go through the
& M) n" x7 X7 F; e4 [. P$ fscrutiny of picking referees. But to serve as a channel for the general
* i: t# Y* |2 t8 U9 D) \1 @; E0 E) {populace to be in touch with and appreciate science, the authors and editors
1 `) Y6 }% _ {! I5 J& s2 V$ P2 Oshould at least present the readers with facts within the proper context,9 Z9 H2 A4 [1 P1 v
which they blatantly failed to do.
; |; l& w/ w5 g, q/ N: a' s2 e4 H/ V# Y. j% f/ u
First, to identify Ye’s performance increase, Ewen Callaway compared her
- w! N2 D9 y: L1 u) }& e3 eOlympic 400-metre IM time with her performance at the World Championships in
8 n: r6 x0 g0 X: o( R. W8 `2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ ~/ n( X' [; i0 h' i* v. G( f! i
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous% J/ j' P c0 _
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
- J( `7 A S0 Z" @. {& qimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the% z7 @3 ?% s# E/ K0 X
difference between the gold and silver medal, I see no reason for 5.38 s to
& k. C* }+ i3 N: ~be treated as 7 s.5 M& B: ~2 n O
" f3 b: B: E: RSecond, as previously pointed out, Ye is only 16 years old and her body is/ R: U& B" R* E* _, [
still developing. Bettering oneself by 5 seconds over two years may seem5 V4 ?8 @+ F& g' s* y
impossible for an adult swimmer, but it certainly happens among youngsters.
$ V* l; [$ R( i2 F7 {& ?An interview with Australian gold medallist Ian Thorpe revealed that his 400
$ S3 S- I2 n% m" c( y& G-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
2 D: ^% S: W8 Z& ?* h# b' hFor regular people, including Callaway, it may be hard to imagine what an8 M7 k9 U0 t$ i- H( X
elite swimmer can achieve as he or she matures and undergoes scientific and
1 c T! n; o! a5 B' qpersistent training. But jumping to the conclusion that it is “anomalous”
9 f s) E6 D, m' s$ obased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.% j7 R B9 L+ |* M
. D4 D& |8 T W- Z; q
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook! D4 p" S3 z0 V* l# d1 u
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
! ~- w9 d. ]1 Dthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
$ w( n' Y9 ?1 F$ y9 |$ E+ O Whe chose not to push himself too hard and to conserve his energy for later
; l; O4 o$ m. H% @5 g! W( Z& ^ Jevents (whether this conforms to the Olympic spirit and the ‘use one’s8 K; R! R. J9 V
best efforts to win a match’ requirement that the Badminton World+ T4 I1 g3 k; E& n( b5 R3 p
Federation recently invoked to disqualify four badminton pairs is another
1 {+ t5 u: w; Y" ] r8 ~! |topic worth discussing, though probably not in Nature). Ye, on the other( o( e' x* E4 H/ \: C
hand, was trailing behind after the first 300 metres and relied on freestyle
, y$ H5 t7 R8 q, in which she has an edge, to win the race. Failing to mention this- S& C! V) ^& t$ d* U' E
strategic difference, as well as the fact that Lochte is 23.25 seconds
4 u$ T9 Y+ e0 b7 n$ y: f z! s2 Gfaster (4:05.18) than Ye overall, creates the illusion that a woman swam F* Q* V) S" d2 m+ @3 P
faster than the best man in the same sport, which sounds impossible. Putting- f C# U3 ?% S
aside the gender argument, I believe this is still a leading question that6 l: U$ c$ F5 g, b. y* b8 Y
implies to the reader that there is something fishy going on.
/ W0 r7 O0 \* ?! g8 ]
. Z- j. x; W! b/ ^Fourth is another example of cherry-picking. In the same event, there are7 _# ^6 w" M' y( n/ E1 P5 J- I
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.931 l4 }( }7 d9 g9 X7 p& t2 a
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s- r# r6 H5 ~/ R+ g7 M
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
7 |6 n7 O; h2 |4 ]3 _1 Cout, if we are just talking about the last 50 metres in a 400-metre IM,
, n* ^& j+ {4 yLochter is not the example I would have used if I were the author. What kind2 r3 u( w! _5 {: u6 \9 [4 y3 x$ }
of scientific rigorousness is Callaway trying to demonstrate here? Is it$ j; ^$ l3 F) z4 p" {/ `4 }& X1 {: ?
logical that if Lochter is the champion, we should assume that he leads in" F$ B' O0 L8 B1 i0 O
every split? That would be a terrible way to teach the public how science
. R! b& y" Z* c3 l+ cworks., q ~/ z0 R- x! P* @, A* ]
" B: y. A% n9 @$ y1 f1 n# c7 Z
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
! i9 u! u ^/ s% `% aimplies that a drug test cannot rule out the possibility of doping. Is this: Q& `3 M9 y$ w# N
kind of agnosticism what Nature really wants to teach its readers? By that. n R/ J _& g$ P
standard, I estimate that at least half of the peer-reviewed scientific
" X$ x# Y/ F2 U8 `) }papers in Nature should be retracted. How can one convince the editors and
/ z* v, U# A/ F0 Q6 j0 Qreviewers that their proposed theory works for every possible case? One0 I# ^) p7 L# E. v
cannot. One chooses to apply the theory to typical examples and to
! s. b& H7 @ _demonstrate that in (hopefully) all scenarios considered, the theory works1 X+ C0 B( j# _, Y, K: N
to a degree, and that that should warrant publication until a counterexample
3 f! B( {$ p! `# @7 ris found. I could imagine that Callaway has a sceptical mind, which is' M+ f+ P, ^( e' g% w
crucial to scientific thinking, but that would be put to better use if he7 A2 o! l( k2 N7 o5 [
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly4 P; I8 c4 g C; v- @
advanced, non-detectable drug that the Chinese have come up with in the
3 x( g5 L& U2 }- p5 c& [; {. q5 L; zpast 4 years (they obviously did not have it in Beijing, otherwise why not0 q5 w0 h% Z& |5 O ` s) B+ E
use it and woo the audience at home?), based on data and rational derivation
8 j7 ^( C7 W! J, |. This article, however, can be interpreted as saying that all athletes are
6 \% h u) a6 e1 l6 X+ Qdoping and the authorities are just not good enough to catch them. That may
4 X9 E) m$ a1 k- \be true, logically, but definitely will not make the case if there is ever a/ l( Q ]; S0 f
hearing by the governing body for water sports, FINA, to determine if Ye6 E7 f( o- L5 @# h' b& g9 ?4 a
has doped. To ask whether it is possible to obtain a false negative in a
0 N7 h4 ]' a& e) o8 S+ xdrug test looks like a rigged question to me. Of course it is possible:
/ s2 i! {6 \- \other than the athlete taking a drug that the test is not designed to detect
3 F& N! p: t6 D9 }# y. l, j' ?, anyone who has taken quantum 101 will tell you that everything is& k0 g, [. V# Y2 s4 Q
probabilistic in nature, and so there is a probability that the drug in an9 h( y/ a J B$ k6 `) l9 \
athlete’s system could tunnel out right at the moment of the test. A slight
# \* s. n% O" Jchance it may be, but should we disregard all test results because of it?0 x+ U2 W2 D# ], z( c
Let’s be practical and reasonable, and accept that the World Anti-Doping8 y" h% f9 f1 X# G- J
agency (WADA) is competent at its job. Ye’s urine sample will be stored for- b9 O: p! w# B" H
eight years after the contest for future testing as technology advances.9 a& |( D$ S# N
Innocent until proven guilty, shouldn’t it be?& \0 ^( Z* l3 u' ?" g' d2 X( a% `) E# h
9 p8 i: g' i2 t' V
Sixth, and the last point I would like to make, is that the out-of-: _$ p, a2 w9 B3 n% V9 S2 r
competition drug test is already in effect, which Callaway failed to mention/ h( b6 V9 u) m# m( }3 g ?
. As noted in the president of WADA’s press release, drug testing for. T% L0 n& z* t: _' l8 t, C
Olympians began at least six months before the opening of the London4 G5 Z3 X( n% D$ R- V# L
Olympics. Furthermore, 107 athletes have been banned from this Olympics for9 e% t% Y: `9 ^( _
doping. That may be the reason that “everyone will pass at the Olympic
8 K3 G* Y' M G/ A6 A- Lgames. Hardly anyone fails in competition testing” — those who did dope
: W3 ~9 X* Y) J" ^! Zhave already been caught and sanctioned. Callaway is free to suggest that a
, K( u( w% q; b0 J2 F0 @player could have doped beforehand and fooled the test at the game, but this5 g. g- ^- f8 y3 }8 P! i5 H
possibility is certainly ruled out for Ye.
) b+ i! k2 _6 X9 c) o
" I" v% ?+ R- {. `, LOver all, even though Callaway did not falsify any data, he did (
+ \/ A1 L6 f4 e5 L9 n4 l ]intentionally or not) cherry-pick data that, in my view, are far too
! _. o+ z; w& D d' u" i4 Qsuggestive to be fair and unbiased. If you want to cover a story of a( a0 H9 A5 Z# J4 n
suspected doping from a scientific point of view, be impartial and provide- O. p% F, G0 Y( t& j! N' k
all the facts for the reader to judge. You are entitled to your4 B) X+ t, U! r0 L) y. b2 Q+ l; T
interpretation of the facts, and the expression thereof in your piece,; h/ p0 B/ u0 |1 ^7 j7 n
explicitly or otherwise, but showing only evidence that favours your
9 |; e6 r# e0 W! Iargument is hardly good science or journalism. Such an article in a journal
: U9 ~2 z7 l) ?such as Nature is not an appropriate example of how scientific research or6 ^3 ?: q- U) B
reporting should be done. |
|