 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
% s4 L H C I+ @7 {如果是中国长大的,英语能到这种程度真是很不简单。
3 C$ k/ l0 g7 O/ g
3 e- H# R X1 p7 {$ Q$ r0 K" |& }http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html: L/ @2 o; j/ c& w& |
) Y4 L* R S+ n& C' k0 W6 B% H
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania. r7 m5 L1 h+ z. _ K6 l1 N
J+ J0 s! y1 Y8 E: V0 n8 @$ W
It is a shame to see Nature — which nearly all scientists, including myself% J8 J* g# u5 d3 r
, regard as one of the most prestigious and influential physical-science
7 u2 H! Q! o8 t3 n' ^- h7 Qmagazines — publish a thinly veiled biased article like this. Granted, this
F* A" |+ B; Eis not a peer-reviewed scientific article and did not go through the
3 q' S9 {" T' s, [( xscrutiny of picking referees. But to serve as a channel for the general$ L+ p7 }" o2 B1 d
populace to be in touch with and appreciate science, the authors and editors8 d4 v) V Z! e/ b8 A1 o
should at least present the readers with facts within the proper context,. g, n9 H. W+ { }) N1 x
which they blatantly failed to do.
% _9 k$ z( d( a9 l, Z( v2 V
) V/ `! j: z# n! r1 _) gFirst, to identify Ye’s performance increase, Ewen Callaway compared her
/ _3 `) e7 y+ t) ]- T, WOlympic 400-metre IM time with her performance at the World Championships in7 q( J, ^' |6 i ~
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “2 \0 x0 X- t% ^- v' i7 U
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous1 n0 K. f. h2 |! x
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
' u+ c4 ]( y3 a3 i. `+ aimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
; q& {& n1 B+ t7 c5 Q% ddifference between the gold and silver medal, I see no reason for 5.38 s to! G+ z) s$ }8 `9 `# H3 }
be treated as 7 s.
2 h; F3 Y X$ r+ N0 h' B5 L0 n$ f5 y
/ G" x& F4 v" v& r0 i R" |Second, as previously pointed out, Ye is only 16 years old and her body is
2 z3 o4 Z; x6 O! R( t+ ]still developing. Bettering oneself by 5 seconds over two years may seem
1 I9 P% {2 E1 Jimpossible for an adult swimmer, but it certainly happens among youngsters.
) H; [4 s3 v z% D# [An interview with Australian gold medallist Ian Thorpe revealed that his 400
9 P- ?2 }: R- `2 R- ?7 x-metre freestyle time improved by 5 seconds between the ages of 15 and 16.3 j3 E: @+ C- z% S. x9 B
For regular people, including Callaway, it may be hard to imagine what an! y& z, h: N# [# s) d
elite swimmer can achieve as he or she matures and undergoes scientific and
& s7 j) v( N1 b, {2 K3 _+ M% _persistent training. But jumping to the conclusion that it is “anomalous”$ K K5 a3 Q! I+ o1 [. d
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.5 ]2 l% L* D: y1 R* z
T' q5 q2 B/ ?1 n2 [$ nThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 r! ~8 d3 z Z6 b5 O' cexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
, l3 g, I) B" }6 B- C# ?the last 50 metres, but Lochte had a huge lead in the first 300 metres, so& M/ Y) K8 g6 S( S. K# M. X% z( _6 N
he chose not to push himself too hard and to conserve his energy for later
0 `% h) n9 n2 @: z; b% j2 Cevents (whether this conforms to the Olympic spirit and the ‘use one’s" t2 Y) [# p4 o
best efforts to win a match’ requirement that the Badminton World
5 y" ]" o- O( R( ]: e5 E. B( T, KFederation recently invoked to disqualify four badminton pairs is another5 p4 T0 Y7 d& ?% @5 T- I
topic worth discussing, though probably not in Nature). Ye, on the other7 f; t4 r5 S, N3 j. M7 K
hand, was trailing behind after the first 300 metres and relied on freestyle
% G5 m: P1 v: p, H, in which she has an edge, to win the race. Failing to mention this
A I0 o* B* Z5 v2 Wstrategic difference, as well as the fact that Lochte is 23.25 seconds
% m1 Q% r1 ]. \: V9 G+ b! afaster (4:05.18) than Ye overall, creates the illusion that a woman swam1 f6 {( ^: ^! f2 t
faster than the best man in the same sport, which sounds impossible. Putting/ K- {, k) N6 L% m
aside the gender argument, I believe this is still a leading question that e* l% f6 _. k: @9 P, n1 s
implies to the reader that there is something fishy going on.
" B6 ?4 t( ~& J0 o: p7 m4 u; C, `5 y6 s! F5 \
Fourth is another example of cherry-picking. In the same event, there are p6 B$ l8 g7 S) g2 `
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93+ n1 Y1 g2 J4 O8 _( O" |
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
& O& G' G, B. q8 [$ r; t w6 S5 M) o' g- R), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns* W9 |. O I' X' u
out, if we are just talking about the last 50 metres in a 400-metre IM,6 b6 m8 e9 C1 q, N5 ]; H
Lochter is not the example I would have used if I were the author. What kind
$ u/ b% k1 N1 i h8 k, Fof scientific rigorousness is Callaway trying to demonstrate here? Is it
" R# g( F& ~9 [" u8 ?& [$ a% p: Blogical that if Lochter is the champion, we should assume that he leads in
6 \+ z' F; o4 V8 tevery split? That would be a terrible way to teach the public how science
" z. c3 t) l7 T9 H4 U, k8 Dworks.
0 J" C$ g8 i& R" R% g! r, U9 a" J6 T; z% G3 M
Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( y/ E: L1 o) g1 U$ limplies that a drug test cannot rule out the possibility of doping. Is this9 O( e" [, \. ^7 `: H: f
kind of agnosticism what Nature really wants to teach its readers? By that
" s" C/ | A4 W* Y, Y+ J' Y% \9 wstandard, I estimate that at least half of the peer-reviewed scientific
4 X$ A8 V; g D. V1 @' fpapers in Nature should be retracted. How can one convince the editors and6 j4 i3 ^# P `2 u4 _) g! w
reviewers that their proposed theory works for every possible case? One8 V2 d7 e: P1 r8 R( j
cannot. One chooses to apply the theory to typical examples and to
8 Q0 J, e% Y' D9 mdemonstrate that in (hopefully) all scenarios considered, the theory works
1 i4 X) V& d/ W- t& D: H9 wto a degree, and that that should warrant publication until a counterexample3 M" t8 t4 k/ L7 v* X
is found. I could imagine that Callaway has a sceptical mind, which is
u9 d% s% g* Ccrucial to scientific thinking, but that would be put to better use if he
$ S0 r% b3 l3 _9 |1 m6 Ywrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
) e5 i, l" o1 \3 e' ?# G& Y5 wadvanced, non-detectable drug that the Chinese have come up with in the
, |4 {0 S- K: E1 h: [* Z' z# t- m# qpast 4 years (they obviously did not have it in Beijing, otherwise why not
f% h! o( s# B1 B7 w9 \% h: kuse it and woo the audience at home?), based on data and rational derivation
; s3 x" Z7 Y: T. This article, however, can be interpreted as saying that all athletes are* Z) G9 X: C4 `$ `; U' v
doping and the authorities are just not good enough to catch them. That may g/ x0 N& m& O; r
be true, logically, but definitely will not make the case if there is ever a! w f4 Y, c$ A: j: s* p8 v: D |
hearing by the governing body for water sports, FINA, to determine if Ye
8 x! l/ ~# P2 R8 g* uhas doped. To ask whether it is possible to obtain a false negative in a
# h0 S) K8 O1 W4 m l8 x1 Sdrug test looks like a rigged question to me. Of course it is possible:
# r% y; b9 n0 u1 t1 b6 Y# cother than the athlete taking a drug that the test is not designed to detect, O6 A8 u: F8 o1 @
, anyone who has taken quantum 101 will tell you that everything is
* i) `+ l7 C8 `" d/ ^- p- dprobabilistic in nature, and so there is a probability that the drug in an
0 \8 R1 H0 n3 tathlete’s system could tunnel out right at the moment of the test. A slight
0 m7 P7 h2 s; ~9 a& ^6 Uchance it may be, but should we disregard all test results because of it?
; I- I4 Y; l, C: i. A# U0 |6 \Let’s be practical and reasonable, and accept that the World Anti-Doping& | l: S& g( l9 k+ X$ z
agency (WADA) is competent at its job. Ye’s urine sample will be stored for% ^6 e6 _# s* c7 e
eight years after the contest for future testing as technology advances.# ^, N0 i% h+ y1 {) D% ?
Innocent until proven guilty, shouldn’t it be?
0 ^: O7 p2 T& M, w7 m( z: a& H) [; A0 i
Sixth, and the last point I would like to make, is that the out-of-
* H6 i, D7 j$ }/ F" \) d( Ccompetition drug test is already in effect, which Callaway failed to mention
4 s% s! L( N5 k. As noted in the president of WADA’s press release, drug testing for
; s: @! V5 }) v8 a) n% n- DOlympians began at least six months before the opening of the London+ e' M: P$ e8 K/ N" l$ I, ~* w; }
Olympics. Furthermore, 107 athletes have been banned from this Olympics for! u3 M0 M" x! v
doping. That may be the reason that “everyone will pass at the Olympic6 Z1 ]/ p/ K9 n7 c! W; V( O
games. Hardly anyone fails in competition testing” — those who did dope
- g0 c4 P3 p9 b7 s$ Mhave already been caught and sanctioned. Callaway is free to suggest that a1 p& U. s ?: \, l9 Y
player could have doped beforehand and fooled the test at the game, but this0 l' ^8 d& O3 m3 p3 \
possibility is certainly ruled out for Ye.
, G/ S4 f- u: V. k- h! K& E, L: u- ^, X0 D
Over all, even though Callaway did not falsify any data, he did (+ {6 i# s/ V# H
intentionally or not) cherry-pick data that, in my view, are far too
8 {9 V! T V" f' Ssuggestive to be fair and unbiased. If you want to cover a story of a
1 j8 c! ^$ N; Asuspected doping from a scientific point of view, be impartial and provide* V i. X* c& d W1 g
all the facts for the reader to judge. You are entitled to your0 I/ o' I& |0 I, a
interpretation of the facts, and the expression thereof in your piece,2 X! K8 S- u: E$ x$ ^2 C
explicitly or otherwise, but showing only evidence that favours your
9 D/ z. I1 h* a6 J5 Dargument is hardly good science or journalism. Such an article in a journal% h% ]0 Z( l- p# G
such as Nature is not an appropriate example of how scientific research or( g# U' U' i, p# a6 o/ Z" F2 @
reporting should be done. |
|