 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 JIANG6 v. {6 T- R3 y# u
如果是中国长大的,英语能到这种程度真是很不简单。. n% \: G1 p/ Q6 a4 V* }4 d
( F2 U0 D, s: r' o% b5 _9 e& n
http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
7 [% ? N: j4 P4 u0 a5 C, u9 J- a: Z1 I% z, a3 J
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania3 V8 t4 J) w& k6 ?5 }' u
! ], E4 T6 Y4 c' |+ h, Q" s
It is a shame to see Nature — which nearly all scientists, including myself) R2 ]- L3 Q3 g1 j3 `
, regard as one of the most prestigious and influential physical-science
8 U9 z1 m R8 U% U& h+ smagazines — publish a thinly veiled biased article like this. Granted, this
7 N" A2 _5 a1 L5 F; s+ Gis not a peer-reviewed scientific article and did not go through the
2 m* j8 ?: v5 c/ h2 e: l) [2 vscrutiny of picking referees. But to serve as a channel for the general; F2 S' @- q3 N/ T" o' b& u! L" l
populace to be in touch with and appreciate science, the authors and editors
2 }" b+ R+ S$ I6 K/ y1 Mshould at least present the readers with facts within the proper context,- j5 T2 t- R T2 l
which they blatantly failed to do.
+ ?. t, i. Y: m
# n7 F7 J6 c" kFirst, to identify Ye’s performance increase, Ewen Callaway compared her2 |9 Q7 P0 X/ m
Olympic 400-metre IM time with her performance at the World Championships in0 L' f7 t1 Q( }( t _" L$ N
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 @9 G" }+ x, K& j: }
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 V9 O7 d" \- l2 Hpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an1 G6 A# A9 ]& n" z: b L3 i
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the) J L5 V9 L* E D9 A$ {
difference between the gold and silver medal, I see no reason for 5.38 s to
3 A# M# u9 ~% R( c, Z' x, Qbe treated as 7 s.
$ m+ O/ c) m4 D. g8 ~ B7 J" m( H# I! b5 p0 w
Second, as previously pointed out, Ye is only 16 years old and her body is+ ^1 l' m( a6 B, r& E
still developing. Bettering oneself by 5 seconds over two years may seem M4 Z, [3 x! p) g7 z% H
impossible for an adult swimmer, but it certainly happens among youngsters.& l% i3 r$ M7 P0 P
An interview with Australian gold medallist Ian Thorpe revealed that his 400
$ X Z9 z/ |( V6 c2 l; F-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
: M8 n, S3 P [$ J) g. }* a* C0 u' gFor regular people, including Callaway, it may be hard to imagine what an& i5 }, ~5 o/ i1 C' X3 k
elite swimmer can achieve as he or she matures and undergoes scientific and; q/ o: K6 @; A2 F
persistent training. But jumping to the conclusion that it is “anomalous”! s# Y8 ~$ a4 S( d" N
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
7 q3 I2 K; m9 J2 e9 \- a3 q
- |7 T9 \+ A; }; @7 rThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook& P. ?# r9 x; ?: U K
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in, `3 ^3 |8 p2 B% X$ E
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
6 o; j$ P% F ^' Z, ~he chose not to push himself too hard and to conserve his energy for later
5 D& u: M# t) Y( u% P. Levents (whether this conforms to the Olympic spirit and the ‘use one’s
+ U# C2 A! i x2 V* [best efforts to win a match’ requirement that the Badminton World
: R3 H% F0 G8 }; L+ m% f+ ]2 iFederation recently invoked to disqualify four badminton pairs is another* J' U% }% S, F9 C. [ P! z! S
topic worth discussing, though probably not in Nature). Ye, on the other' s% z5 W9 g; b' `
hand, was trailing behind after the first 300 metres and relied on freestyle
/ n$ g9 y1 i+ L1 f+ r9 l# b, in which she has an edge, to win the race. Failing to mention this+ k& A) \% V$ V6 S; \
strategic difference, as well as the fact that Lochte is 23.25 seconds
( F. ~: {- }) m! i5 n% p$ `faster (4:05.18) than Ye overall, creates the illusion that a woman swam
! Y: N* f& `( }' U0 b: afaster than the best man in the same sport, which sounds impossible. Putting+ Q/ B! ]* H$ ], I) l; ?( y
aside the gender argument, I believe this is still a leading question that
9 f) `$ M8 x& X& Oimplies to the reader that there is something fishy going on.
5 M; [% d: Q$ O' P2 p( T0 `; C, C' l$ e! J3 g9 S
Fourth is another example of cherry-picking. In the same event, there are: w- a4 ]8 s$ O% h0 g! z% l
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) i7 t6 m/ C* Q0 K4 m
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
; R3 W4 A' m( W" [1 J9 [), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns7 u+ e! B; D4 k; I
out, if we are just talking about the last 50 metres in a 400-metre IM,! e# h/ M$ D: R1 T
Lochter is not the example I would have used if I were the author. What kind+ A6 i2 n" F, \* m6 j
of scientific rigorousness is Callaway trying to demonstrate here? Is it4 z$ k- Q- {, h; P2 n/ T+ {
logical that if Lochter is the champion, we should assume that he leads in
9 N4 }1 X! G R$ O2 Gevery split? That would be a terrible way to teach the public how science
" h. a. K" u- g& }* | p0 Xworks.
1 }& A: X0 B, a2 ~0 n: {* t: ^
; @0 Y( R/ A* v w7 [/ R2 R; kFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
1 \6 s* R% v0 v1 f( f( s T( n: @4 ?implies that a drug test cannot rule out the possibility of doping. Is this+ `' p' F6 m5 T! j0 A
kind of agnosticism what Nature really wants to teach its readers? By that
3 Y7 e, `. l- m4 n4 Astandard, I estimate that at least half of the peer-reviewed scientific
( q/ J' j. g5 a. p$ ~3 spapers in Nature should be retracted. How can one convince the editors and) Z& r& k/ `* E+ R j K/ T
reviewers that their proposed theory works for every possible case? One% l1 Z! h! }, ?' ?
cannot. One chooses to apply the theory to typical examples and to9 G( [% d( w' Y, R$ [) B
demonstrate that in (hopefully) all scenarios considered, the theory works
4 U9 K$ P6 J$ U1 O" ~to a degree, and that that should warrant publication until a counterexample
3 P. L; \6 x, f# Fis found. I could imagine that Callaway has a sceptical mind, which is" m e8 k6 V* P( R
crucial to scientific thinking, but that would be put to better use if he2 O# U2 ]" j, v& V5 a! e1 N
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly7 W- N- |4 r4 r E7 o8 ?
advanced, non-detectable drug that the Chinese have come up with in the0 M/ F% J* |& z! N( ? T8 o3 T
past 4 years (they obviously did not have it in Beijing, otherwise why not n, _2 b1 f |" X" ^: L4 ]8 `
use it and woo the audience at home?), based on data and rational derivation
2 R G* R4 ?" l' X. This article, however, can be interpreted as saying that all athletes are
( ?8 H, T, ^8 l- |, j5 D7 rdoping and the authorities are just not good enough to catch them. That may
; G9 u; ?3 y1 r4 Y2 `+ U% c4 {( fbe true, logically, but definitely will not make the case if there is ever a
7 d$ [$ E9 c' p- N% l! A2 H! y1 i9 zhearing by the governing body for water sports, FINA, to determine if Ye
0 {+ i3 w- I ~/ G( n$ Z2 shas doped. To ask whether it is possible to obtain a false negative in a4 y8 h% Y, U* o' I, D
drug test looks like a rigged question to me. Of course it is possible:
a& y3 X6 ]0 c7 ^5 Mother than the athlete taking a drug that the test is not designed to detect" g$ N3 J8 u$ T- y8 J8 y
, anyone who has taken quantum 101 will tell you that everything is
7 ^$ f" b+ o% Z# H0 q# wprobabilistic in nature, and so there is a probability that the drug in an9 F1 p! k, J& H# @) Q' ~* J+ j
athlete’s system could tunnel out right at the moment of the test. A slight, Y1 d; r" J+ o7 B
chance it may be, but should we disregard all test results because of it?$ y& f$ A1 y$ ^
Let’s be practical and reasonable, and accept that the World Anti-Doping
, A: Z! K" ~( N: x0 jagency (WADA) is competent at its job. Ye’s urine sample will be stored for
0 K1 n- F7 @9 T* \2 t- ueight years after the contest for future testing as technology advances.5 f2 m9 [/ N2 l/ U) j2 L* c
Innocent until proven guilty, shouldn’t it be?" B' T+ Y9 ^+ Y4 t* B: R* g. }
9 |- W0 E }, X+ W7 ^. S6 xSixth, and the last point I would like to make, is that the out-of-
/ A& h* ?: c- c7 h) |5 b9 ocompetition drug test is already in effect, which Callaway failed to mention
5 R$ K* V! ~: B0 X: s. As noted in the president of WADA’s press release, drug testing for" N* X& R; q" i! s( C
Olympians began at least six months before the opening of the London3 S% n2 R- E% r. m; R x) S& E3 x
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
+ q2 R6 L; ^6 F" J' M1 xdoping. That may be the reason that “everyone will pass at the Olympic& U8 n" c4 w! s8 q U6 D! B
games. Hardly anyone fails in competition testing” — those who did dope) J! @1 t7 u X
have already been caught and sanctioned. Callaway is free to suggest that a0 |" d( v: ^0 m, I; L# {
player could have doped beforehand and fooled the test at the game, but this
4 Q- U' v; p! H; R) p5 G( `possibility is certainly ruled out for Ye.$ i. z7 s( o9 q/ u" `. Q, q8 j
! R- X7 e7 h( u q6 A e
Over all, even though Callaway did not falsify any data, he did (
5 d- K( Y4 {) o7 Mintentionally or not) cherry-pick data that, in my view, are far too
1 I) H5 t9 f0 |& O- `7 Z2 s& ?suggestive to be fair and unbiased. If you want to cover a story of a2 `1 A! {2 Q( G; B% X2 A$ H
suspected doping from a scientific point of view, be impartial and provide
7 j7 G5 _ c0 D* \all the facts for the reader to judge. You are entitled to your9 {' j3 w/ w A! s1 @6 |
interpretation of the facts, and the expression thereof in your piece,
: K, K1 w( W8 ?" Z) |/ Xexplicitly or otherwise, but showing only evidence that favours your7 x& V3 R$ j( r9 ~
argument is hardly good science or journalism. Such an article in a journal
- h3 ]7 Z- c. csuch as Nature is not an appropriate example of how scientific research or
9 a' ]0 P/ Q8 a; R) C0 A7 k! o' A% V/ Vreporting should be done. |
|