 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
6 \+ B2 r/ M, e9 t# {如果是中国长大的,英语能到这种程度真是很不简单。
8 M- s3 h9 Y( f, M2 d
+ t1 z% V! r. t* {' r Nhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
^$ t: u) S7 H" K* f
) U& ~0 R" x( qFROM LAI JIANG, Department of Chemistry, University of Pennsylvania, L2 l% S; Y8 C, G, _6 L
- q: j, Z# @9 k9 ?
It is a shame to see Nature — which nearly all scientists, including myself8 c% f. J, [( S/ U3 |
, regard as one of the most prestigious and influential physical-science7 P& g, P$ t* D: B8 J
magazines — publish a thinly veiled biased article like this. Granted, this: s! {, g1 {1 v
is not a peer-reviewed scientific article and did not go through the0 P$ y8 R: F: W- ], L: {
scrutiny of picking referees. But to serve as a channel for the general
5 j8 a/ g" r' ?, t2 Gpopulace to be in touch with and appreciate science, the authors and editors" T8 {' X9 M9 F) J" d6 G6 O
should at least present the readers with facts within the proper context,
& s; v* k( f, p0 h6 p2 Zwhich they blatantly failed to do.
7 c+ ?9 u$ o$ t3 ]4 c: ^, {$ a3 M) s
First, to identify Ye’s performance increase, Ewen Callaway compared her
+ M& r4 ] u7 G' TOlympic 400-metre IM time with her performance at the World Championships in
6 X; q* X6 x9 F) j+ D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
6 s% O0 Z8 ?3 S- |0 |( l. Lanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 P1 Z8 l2 J/ ~personal best was 4:33.79 at the Asian Games in 2010. This leads to an
. U+ n7 q, z% d3 Kimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
3 ?( q+ y% F$ V8 l8 Sdifference between the gold and silver medal, I see no reason for 5.38 s to
" m) e# E& @- w+ m( ^be treated as 7 s.4 }/ L* `- \% w% e7 P; g- }+ Z
1 h {5 T; T% `* Y
Second, as previously pointed out, Ye is only 16 years old and her body is9 _% v) R: W/ C
still developing. Bettering oneself by 5 seconds over two years may seem4 x: j/ H" h* M& U8 x9 W
impossible for an adult swimmer, but it certainly happens among youngsters.! w% u/ q. j i! |# T$ H
An interview with Australian gold medallist Ian Thorpe revealed that his 400" V* M% f) d' `7 `- n* N
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
" i" Q8 y, G: u5 u' r) dFor regular people, including Callaway, it may be hard to imagine what an! V, {9 Z$ _6 W9 c9 S0 J6 O# i- ^
elite swimmer can achieve as he or she matures and undergoes scientific and x3 J. ?2 {" N5 f
persistent training. But jumping to the conclusion that it is “anomalous”2 X }8 Y4 N: C3 }4 }/ X
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
9 Q- U1 O) M" U: k& o8 S9 Z4 v0 v) y: V5 W( f
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook& p) {0 t3 I; o2 D
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in% h' s4 _- b: i- H
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
, N8 b8 x! P5 k+ r& u# n6 {he chose not to push himself too hard and to conserve his energy for later3 @6 Z0 k6 l3 P4 Z5 `' k
events (whether this conforms to the Olympic spirit and the ‘use one’s
8 F$ N" @) }% Bbest efforts to win a match’ requirement that the Badminton World+ M2 p6 V' c# A3 S( T0 H; t9 H
Federation recently invoked to disqualify four badminton pairs is another
+ g4 d* {. a/ t b" j5 qtopic worth discussing, though probably not in Nature). Ye, on the other
1 B- k7 z" A* z3 ~' e6 k6 ghand, was trailing behind after the first 300 metres and relied on freestyle# v9 p7 K+ c& t
, in which she has an edge, to win the race. Failing to mention this
) o+ ?( J5 t% P7 Y% d. ostrategic difference, as well as the fact that Lochte is 23.25 seconds
9 g( {3 O8 B- o: B5 P1 qfaster (4:05.18) than Ye overall, creates the illusion that a woman swam% B3 x* ^& \' L& L
faster than the best man in the same sport, which sounds impossible. Putting' }6 k% w' {0 g9 I5 O; {
aside the gender argument, I believe this is still a leading question that" D6 S1 ?4 W3 g& O" }
implies to the reader that there is something fishy going on.) t6 `0 n6 p: U V6 e( j
: Z: @# j- T2 @ h- {
Fourth is another example of cherry-picking. In the same event, there are! D4 Z. _* a1 W
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
( @2 o0 O8 l1 ?" I9 Es) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s5 c! d, a5 K" s6 I& N4 K$ l
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns/ b. Q5 |, A- [/ Q t
out, if we are just talking about the last 50 metres in a 400-metre IM,
9 g: p1 Z( ]. q; l% q1 @; yLochter is not the example I would have used if I were the author. What kind
4 D9 d' ] L" |- z! B0 S, Eof scientific rigorousness is Callaway trying to demonstrate here? Is it0 F: S0 v+ b+ X% d
logical that if Lochter is the champion, we should assume that he leads in$ V( H/ ?( T1 q2 @" `; S* e: _) q
every split? That would be a terrible way to teach the public how science$ i6 f" E; h5 h. _$ v
works.7 p( s. Q6 L( t0 m: l, G9 f
7 K3 ?2 P( L6 o0 U) P! l2 \Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and* V: ?7 q7 Q8 @$ G
implies that a drug test cannot rule out the possibility of doping. Is this" s) a( Q6 t7 m" R: c4 M
kind of agnosticism what Nature really wants to teach its readers? By that( X4 {; a! E1 \+ ^$ H
standard, I estimate that at least half of the peer-reviewed scientific# k- l/ w0 d7 _' r0 O
papers in Nature should be retracted. How can one convince the editors and
) ^0 c9 f' V! r3 v: j% Creviewers that their proposed theory works for every possible case? One
( h, `8 E. ?! Y6 L1 U3 I$ o% icannot. One chooses to apply the theory to typical examples and to
9 ]3 u; D& i& I" y! Sdemonstrate that in (hopefully) all scenarios considered, the theory works
# H" r. _8 h+ H3 X+ {to a degree, and that that should warrant publication until a counterexample# x7 U( |& H1 u8 g
is found. I could imagine that Callaway has a sceptical mind, which is4 `7 Z+ `! H1 n6 }0 i1 J! Z
crucial to scientific thinking, but that would be put to better use if he) w2 n/ q. O ?. H3 l
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
4 ]2 _! C8 f( p3 X3 k Fadvanced, non-detectable drug that the Chinese have come up with in the
, r a! r8 |8 }& ~- c3 X2 Vpast 4 years (they obviously did not have it in Beijing, otherwise why not
/ A% G3 e4 q- [# j5 W5 xuse it and woo the audience at home?), based on data and rational derivation
2 {4 d3 y+ Z' Z0 z. This article, however, can be interpreted as saying that all athletes are9 ^: A7 z o2 F9 z0 Y0 Y2 ~( {! e
doping and the authorities are just not good enough to catch them. That may
+ \/ @) f8 W4 L0 w+ ^) ~( V& e) e! Bbe true, logically, but definitely will not make the case if there is ever a4 w# }* d" Y% l" X% a8 j' j3 r
hearing by the governing body for water sports, FINA, to determine if Ye
) u' @2 Z3 W3 \0 e7 Qhas doped. To ask whether it is possible to obtain a false negative in a- {) Q4 L* e2 Z# D6 U( p& f' [8 W
drug test looks like a rigged question to me. Of course it is possible:; q7 X- J- m: M% y0 H' }1 i( K8 j
other than the athlete taking a drug that the test is not designed to detect, y& [4 V$ M4 J# G1 v0 J
, anyone who has taken quantum 101 will tell you that everything is: S) [- B, M2 {
probabilistic in nature, and so there is a probability that the drug in an
& I" A M; a( U# a: Uathlete’s system could tunnel out right at the moment of the test. A slight
9 ^* ~, l+ U4 c$ c1 C1 Xchance it may be, but should we disregard all test results because of it?3 d) {4 {' Q2 u# y3 s' M6 a
Let’s be practical and reasonable, and accept that the World Anti-Doping8 X+ b# v4 g2 Q2 I9 _- Y
agency (WADA) is competent at its job. Ye’s urine sample will be stored for+ \0 K5 s( `( k/ U# @
eight years after the contest for future testing as technology advances.
4 h, w, y5 ^ X& V7 ~9 L) P+ @. u9 K. w$ FInnocent until proven guilty, shouldn’t it be? [4 b! l7 Q- h5 O5 v
! \8 V1 r4 O0 N4 N: X
Sixth, and the last point I would like to make, is that the out-of-
$ E9 f G+ ^5 t2 x. _; L- ecompetition drug test is already in effect, which Callaway failed to mention. {- @8 a7 V! O8 `# Z, t1 u: P/ F4 k
. As noted in the president of WADA’s press release, drug testing for1 i5 s& J% u# P+ m {; U4 A
Olympians began at least six months before the opening of the London) ~- L" [/ V) g* i) u* a6 m
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
) d" U; n7 M9 E: S8 _: S1 Ddoping. That may be the reason that “everyone will pass at the Olympic' [% u- i( {, R* c* e
games. Hardly anyone fails in competition testing” — those who did dope* K: r0 A4 d7 b+ _% P$ k
have already been caught and sanctioned. Callaway is free to suggest that a
% v! U( M# g2 j2 x% P+ hplayer could have doped beforehand and fooled the test at the game, but this
# W; h" h: j. d( D Q+ O) g+ vpossibility is certainly ruled out for Ye.
8 U# b5 q2 c9 e, m, N8 b, I
3 q& V9 x; S0 y* j5 `, ~Over all, even though Callaway did not falsify any data, he did (/ I) a9 ~: Q) I. y, v' m
intentionally or not) cherry-pick data that, in my view, are far too
) ?) Q& l) v# q* |4 l) nsuggestive to be fair and unbiased. If you want to cover a story of a6 ~6 f+ m4 K1 i
suspected doping from a scientific point of view, be impartial and provide! E; Q( I& Y7 J+ m
all the facts for the reader to judge. You are entitled to your
( i9 y3 }& V# j3 ^0 ?. U1 Y3 N. Ninterpretation of the facts, and the expression thereof in your piece,
3 i/ |/ \+ I3 v! U% Yexplicitly or otherwise, but showing only evidence that favours your
' G: V- B* H8 eargument is hardly good science or journalism. Such an article in a journal0 N0 c# n' u5 c" w" q. J5 d8 q+ r) D
such as Nature is not an appropriate example of how scientific research or
' e' ?4 a. j! x4 i7 o8 ~% ereporting should be done. |
|