 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$ ^2 x; D' G( {& X7 V+ `
如果是中国长大的,英语能到这种程度真是很不简单。7 ~. u V/ `; D
* e. {2 E# \1 ahttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
& I% U1 @* C t, `+ ?7 m: B1 v4 A) }- A) {$ v$ [
FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
( w, A4 p2 Q6 c" L+ V6 S9 L! @7 y7 Z I3 ]4 U& w
It is a shame to see Nature — which nearly all scientists, including myself
3 s9 T4 ?5 o, Y, regard as one of the most prestigious and influential physical-science
- ]" H4 y8 F! U( emagazines — publish a thinly veiled biased article like this. Granted, this* q- C; q9 \, M' J5 q9 P5 T3 `( q+ \
is not a peer-reviewed scientific article and did not go through the
6 a" w- n, b* |$ T1 E9 y* `6 U) fscrutiny of picking referees. But to serve as a channel for the general
: d( @% p: T! j6 ?9 Cpopulace to be in touch with and appreciate science, the authors and editors
# E, p6 W, n2 {) Xshould at least present the readers with facts within the proper context,4 V w# u' Q) a% F) L' z: E
which they blatantly failed to do.
5 r+ s1 S# Y5 A9 L1 R
& A0 D+ F- C! c, XFirst, to identify Ye’s performance increase, Ewen Callaway compared her
) C+ D8 d7 G; Z3 F+ E5 q. m8 OOlympic 400-metre IM time with her performance at the World Championships in
( C l- R' T5 s2 j% H2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
6 R+ i7 v. Q i+ |/ A* I) }anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
. J+ E8 D$ a! t" Z3 `personal best was 4:33.79 at the Asian Games in 2010. This leads to an& A0 o. ~! g# c. c' y
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the4 U- L- o( I: M. @
difference between the gold and silver medal, I see no reason for 5.38 s to
7 l1 g2 x6 K. O2 Z0 C* w- rbe treated as 7 s.5 A: B/ w. p! u: K# \' p
/ K9 [! w$ K; ]) pSecond, as previously pointed out, Ye is only 16 years old and her body is8 l# _$ C3 Z# e! L8 x% i$ T! n/ {
still developing. Bettering oneself by 5 seconds over two years may seem9 ?8 o9 h. I( q% P# y" V
impossible for an adult swimmer, but it certainly happens among youngsters.
5 T, D5 y( ~ z u+ u8 [An interview with Australian gold medallist Ian Thorpe revealed that his 400
0 v* r% n% l7 r; }& D# ^1 L$ M6 T) ?# M-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
/ T. T% q q1 E% X1 A' LFor regular people, including Callaway, it may be hard to imagine what an( @! [7 u# A1 [/ W8 [
elite swimmer can achieve as he or she matures and undergoes scientific and
@9 i8 M$ V6 b+ g" Apersistent training. But jumping to the conclusion that it is “anomalous”
$ `4 l/ n. `3 H4 V6 o" h* Fbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound. y5 t7 W- r& d/ o% d& e4 T1 ~
" D8 l' x; f7 O) H$ b5 J. F3 V, G
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook1 Z# X% B+ r1 V: s/ F* k
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
# g9 j1 N, f" k% l. Y8 ethe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
) `! \0 ~2 b' }4 Z0 q6 y* Che chose not to push himself too hard and to conserve his energy for later, m) Y: h* W7 _2 g3 h# B( `
events (whether this conforms to the Olympic spirit and the ‘use one’s
, h+ P% E0 S6 c6 Y8 xbest efforts to win a match’ requirement that the Badminton World
* ?! J. R! d! L, h/ H xFederation recently invoked to disqualify four badminton pairs is another0 t0 y& {# @8 }6 M; H$ A* H/ ?7 V
topic worth discussing, though probably not in Nature). Ye, on the other2 C& G; q, r0 p1 m: ^: G
hand, was trailing behind after the first 300 metres and relied on freestyle8 Q8 U* X9 f' ~4 N" L
, in which she has an edge, to win the race. Failing to mention this
$ Q% ~3 p) C: X4 @ E }! estrategic difference, as well as the fact that Lochte is 23.25 seconds
; N$ W; n; `: h X. [faster (4:05.18) than Ye overall, creates the illusion that a woman swam6 B' y# o2 ~" d
faster than the best man in the same sport, which sounds impossible. Putting& a+ u2 h# k8 ?, h& Q
aside the gender argument, I believe this is still a leading question that
z, Q0 g& y; jimplies to the reader that there is something fishy going on.5 P" I* |; Z1 f7 s8 [$ F4 }# K2 M d
3 f% m% }' L$ Z: y! r" g. MFourth is another example of cherry-picking. In the same event, there are
7 |2 A4 T9 p4 k& [7 Wfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) _/ D7 J6 h2 P( c1 Z$ G. M5 M
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
: A' n1 t2 w, D4 I# l! y7 D2 y9 Q; F( C1 X), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns# J' S) d# g+ |& Z; B
out, if we are just talking about the last 50 metres in a 400-metre IM, R* j* M9 x2 F6 \: v0 b5 Q# C6 r
Lochter is not the example I would have used if I were the author. What kind
5 f5 S4 ~' ?7 H X ?; @' iof scientific rigorousness is Callaway trying to demonstrate here? Is it* S) l" J4 ~$ Q6 H
logical that if Lochter is the champion, we should assume that he leads in
' D+ a2 a, E# S2 B2 Qevery split? That would be a terrible way to teach the public how science3 H, Y5 G* C& v; t% |7 t3 S1 c: p
works.
4 ^9 v1 A# s. M; l2 T6 U
: s+ B. A; {) @) d IFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
: J( T* d! y; ?0 k: [implies that a drug test cannot rule out the possibility of doping. Is this
0 a6 H. `; L7 X c: N9 nkind of agnosticism what Nature really wants to teach its readers? By that/ F) M( p7 O9 o5 w2 b# r
standard, I estimate that at least half of the peer-reviewed scientific
( e; ^3 b0 w7 \: @1 Upapers in Nature should be retracted. How can one convince the editors and; O- O- w( ?* N4 i- P; \& o+ f( H
reviewers that their proposed theory works for every possible case? One
4 z) s1 ^7 b2 y$ r# W/ W J6 qcannot. One chooses to apply the theory to typical examples and to
& {5 v# X, w5 J/ a0 a0 ddemonstrate that in (hopefully) all scenarios considered, the theory works
5 {" P: y. U3 W$ s; @to a degree, and that that should warrant publication until a counterexample
1 _4 |5 R' ]" z- ais found. I could imagine that Callaway has a sceptical mind, which is
& }. V- o2 z. I( A; X$ [crucial to scientific thinking, but that would be put to better use if he
; S% r, B+ U2 E9 Awrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
0 D' [# M3 d* \advanced, non-detectable drug that the Chinese have come up with in the
* k1 v, J' b3 E" q0 spast 4 years (they obviously did not have it in Beijing, otherwise why not
- ? t! L) e2 Suse it and woo the audience at home?), based on data and rational derivation
2 _+ E1 X9 U$ e/ c& R5 O: `: @8 }. This article, however, can be interpreted as saying that all athletes are* }7 Z' n0 O/ G
doping and the authorities are just not good enough to catch them. That may
$ G# g# c/ {5 R, I$ R+ N% ]be true, logically, but definitely will not make the case if there is ever a
: k/ k7 b, H) [! P0 V5 Ahearing by the governing body for water sports, FINA, to determine if Ye
) s* q; I7 v1 k! Y, L( V) H# J8 Jhas doped. To ask whether it is possible to obtain a false negative in a
7 n! r' T# B1 c$ D% G$ e" Y: zdrug test looks like a rigged question to me. Of course it is possible:
6 j5 F7 e* Y0 G! Jother than the athlete taking a drug that the test is not designed to detect" u- {# i2 F1 x! w* I9 U
, anyone who has taken quantum 101 will tell you that everything is8 l% b. l y" o H* U0 R
probabilistic in nature, and so there is a probability that the drug in an
|( b$ v2 ^. x9 C9 Yathlete’s system could tunnel out right at the moment of the test. A slight
, t! j: o) Y& X) Ochance it may be, but should we disregard all test results because of it?/ W+ {4 Z. L( B' v% ]) ]
Let’s be practical and reasonable, and accept that the World Anti-Doping
0 B8 I" P( b. n: v* J: U+ wagency (WADA) is competent at its job. Ye’s urine sample will be stored for9 Z8 u- a6 L4 m9 }* M' t3 O
eight years after the contest for future testing as technology advances.
3 ^- P5 j# b$ aInnocent until proven guilty, shouldn’t it be?7 E$ v2 M& V. w6 n+ ]) b) U" [9 M
$ J9 Y0 K3 m, D' R! I4 I7 v
Sixth, and the last point I would like to make, is that the out-of-9 A' u! s4 v, L+ Q
competition drug test is already in effect, which Callaway failed to mention
8 P) p4 ^1 Q$ l3 |. As noted in the president of WADA’s press release, drug testing for
2 z, M* s1 r% T! z2 ^( c8 W' }- d' OOlympians began at least six months before the opening of the London
! {- g( p" ?: YOlympics. Furthermore, 107 athletes have been banned from this Olympics for
# y5 d7 f" f8 f/ o* tdoping. That may be the reason that “everyone will pass at the Olympic
8 A+ [# w+ Q- A+ n$ P: I/ K7 xgames. Hardly anyone fails in competition testing” — those who did dope. Z: Y- p1 |5 `0 F* C+ S' v
have already been caught and sanctioned. Callaway is free to suggest that a |/ m7 s# y. r q: x1 K5 K% M
player could have doped beforehand and fooled the test at the game, but this
1 F3 p7 b D. ]) Ppossibility is certainly ruled out for Ye.- H1 D b% y2 ~" Z; t& ^
% [- ]" Q8 e- J( m
Over all, even though Callaway did not falsify any data, he did (
0 @9 D; [! _$ T" p" Bintentionally or not) cherry-pick data that, in my view, are far too
1 X& T5 n7 ~ G" @7 Xsuggestive to be fair and unbiased. If you want to cover a story of a
* N% A3 r& z+ e# H+ w& \suspected doping from a scientific point of view, be impartial and provide
- R: |! F3 p# e+ ^7 J8 mall the facts for the reader to judge. You are entitled to your
. K2 l) [7 c8 J( N$ o, qinterpretation of the facts, and the expression thereof in your piece,
1 x) b5 g5 a9 ]3 ]; bexplicitly or otherwise, but showing only evidence that favours your$ b$ w6 _* Y1 p2 U' w
argument is hardly good science or journalism. Such an article in a journal
4 c! H& H+ E# ~& a" W/ Q& l3 wsuch as Nature is not an appropriate example of how scientific research or
0 w( c+ o) y# B* E. S& q" ereporting should be done. |
|