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发表于 2012-8-14 00:55
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其实比饶毅更牛的回复是 Upenn 的 LAI JIANG
* ? ^4 X0 D1 M% i如果是中国长大的,英语能到这种程度真是很不简单。1 X7 e$ A! d% ^
1 Q1 F" U. x/ Ghttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself( @0 P* [! G2 Z4 E# N- @4 R
, regard as one of the most prestigious and influential physical-science
- T X7 z* v! _+ N- W: ^magazines — publish a thinly veiled biased article like this. Granted, this
6 F$ ]0 |- {0 zis not a peer-reviewed scientific article and did not go through the1 Q% t( }8 Q+ s6 F
scrutiny of picking referees. But to serve as a channel for the general2 N+ k4 W9 h9 E! i9 K9 g( Z( o
populace to be in touch with and appreciate science, the authors and editors
" L2 j* J! Z @should at least present the readers with facts within the proper context,
: J, m( H; p5 }8 ~which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her* u4 }. W4 G' W N$ Z* \0 c+ s0 R
Olympic 400-metre IM time with her performance at the World Championships in
6 }! i' Z8 @* U5 \; Z) ~2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “( V r# B/ w. Y/ {- e# B- C, \
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
: n9 s; p v0 w: q5 M- M0 vpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
% m9 N @9 n) j) v7 uimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
$ \% h/ M! n6 H# L4 zdifference between the gold and silver medal, I see no reason for 5.38 s to3 p- H2 E8 p( ~, C! c+ f
be treated as 7 s.4 k! u! \8 w7 ^, D
3 S1 Q: J9 o; C, \: }1 aSecond, as previously pointed out, Ye is only 16 years old and her body is
# K3 G3 D: f! Z( C2 d0 N8 U, p [still developing. Bettering oneself by 5 seconds over two years may seem
9 b( y$ {2 c; H( Rimpossible for an adult swimmer, but it certainly happens among youngsters.
& [% b. e+ N1 q+ L AAn interview with Australian gold medallist Ian Thorpe revealed that his 400: b. J+ Q% k! [* b1 T q3 l9 |
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.# \! z% g6 I0 R
For regular people, including Callaway, it may be hard to imagine what an. `' n# U0 u- U9 d- z
elite swimmer can achieve as he or she matures and undergoes scientific and
* B0 I: `* v8 Lpersistent training. But jumping to the conclusion that it is “anomalous”
! f' G! ] W9 g$ Y. _" ybased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.7 v) o8 E9 E6 ~' p y: Z6 n1 \- ~
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
5 [3 O" J6 b- ]example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
. c; o1 W3 t) a" m4 X9 l7 f1 }the last 50 metres, but Lochte had a huge lead in the first 300 metres, so0 X7 A4 O* C* w( a! B! k( _
he chose not to push himself too hard and to conserve his energy for later( K+ w, ]; }- B0 W
events (whether this conforms to the Olympic spirit and the ‘use one’s' @' J0 Q# Z' x2 H9 Y6 i) y
best efforts to win a match’ requirement that the Badminton World& W" k6 ]4 a. U4 I0 v/ {5 {
Federation recently invoked to disqualify four badminton pairs is another2 E) F- d6 {. f. z3 I9 n- _3 H
topic worth discussing, though probably not in Nature). Ye, on the other( Y! w' M- V! ]/ S; ~
hand, was trailing behind after the first 300 metres and relied on freestyle
1 Q9 X8 f7 p/ S+ Y' y, in which she has an edge, to win the race. Failing to mention this
/ E- c/ _4 i- S- {. N: N7 _* N- @strategic difference, as well as the fact that Lochte is 23.25 seconds4 `% g7 w" M( P% K( l" E
faster (4:05.18) than Ye overall, creates the illusion that a woman swam* q. S5 R' p3 ^+ ~2 @
faster than the best man in the same sport, which sounds impossible. Putting$ r$ X/ E Y1 a# F( D: Z
aside the gender argument, I believe this is still a leading question that
9 F- M5 ~" d" R1 b' N5 X# Wimplies to the reader that there is something fishy going on.
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5 X- k' m" \5 QFourth is another example of cherry-picking. In the same event, there are
9 v# ]6 d; a, k+ lfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93 f$ j8 i" {0 y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s8 W0 Q. a q+ Q( m, J% r# _
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
" |6 ^1 n- m$ r$ sout, if we are just talking about the last 50 metres in a 400-metre IM,
/ w1 a, A8 [( [4 P/ f- h2 @Lochter is not the example I would have used if I were the author. What kind% E+ y; a$ c. U, k1 F
of scientific rigorousness is Callaway trying to demonstrate here? Is it' }) I8 t( g: z
logical that if Lochter is the champion, we should assume that he leads in; e- C# h) s7 l% n ~
every split? That would be a terrible way to teach the public how science6 X: f; t- y: U3 @5 S* z6 r
works.
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/ P4 J7 j3 s! F9 kFifth is the issue I oppose the most. Callaway quotes Ross Tucker and3 e; X9 \3 U2 h" r
implies that a drug test cannot rule out the possibility of doping. Is this- V* m. S, R# Z. u# q& C5 A
kind of agnosticism what Nature really wants to teach its readers? By that
- u; O0 ?& d2 ?; k" bstandard, I estimate that at least half of the peer-reviewed scientific
' K& W1 O" T8 ~% R3 w: ~) ~papers in Nature should be retracted. How can one convince the editors and1 ? A2 s8 |$ ~6 c
reviewers that their proposed theory works for every possible case? One2 I' A$ I( f) q/ R8 j8 C
cannot. One chooses to apply the theory to typical examples and to
4 ^( x3 @ ], j, |6 r+ G3 d: M- N8 udemonstrate that in (hopefully) all scenarios considered, the theory works
. R( ]" ^- K4 K( F/ y$ t% A# pto a degree, and that that should warrant publication until a counterexample
* [7 N3 ~+ `. _/ c/ p" ^9 \' Fis found. I could imagine that Callaway has a sceptical mind, which is
) `: T9 m9 H2 i! f6 Ecrucial to scientific thinking, but that would be put to better use if he
& @7 G3 h! U& M( b; ~! U# Dwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: q0 z; @7 g1 P, U: e+ _5 Xadvanced, non-detectable drug that the Chinese have come up with in the
( T& q9 p3 d, O; upast 4 years (they obviously did not have it in Beijing, otherwise why not
2 d' A3 C5 m4 i" i. _9 Q- O0 ^use it and woo the audience at home?), based on data and rational derivation# K' \: M( @9 I7 Y# C9 s
. This article, however, can be interpreted as saying that all athletes are
) y- y2 {8 T' |1 ]6 ]doping and the authorities are just not good enough to catch them. That may8 K' N/ Z7 ]2 I3 {1 A
be true, logically, but definitely will not make the case if there is ever a, k, Q& N {" K5 I a% g
hearing by the governing body for water sports, FINA, to determine if Ye; n- s4 z: c- g% K9 `
has doped. To ask whether it is possible to obtain a false negative in a
* Y: d7 c1 L# Xdrug test looks like a rigged question to me. Of course it is possible:
: j+ O! R7 f- Q, n$ oother than the athlete taking a drug that the test is not designed to detect- }" X. t+ ~# c" B" j* z
, anyone who has taken quantum 101 will tell you that everything is
7 w* w1 G6 f4 F% J' V% hprobabilistic in nature, and so there is a probability that the drug in an
7 B6 ?5 Y1 k- l: K0 m! N, N" Aathlete’s system could tunnel out right at the moment of the test. A slight/ ~8 C# P( J9 P3 t
chance it may be, but should we disregard all test results because of it?
7 \8 p1 Z7 O$ x. NLet’s be practical and reasonable, and accept that the World Anti-Doping
0 t* [+ [5 }! S* ^; |# Z( o* Iagency (WADA) is competent at its job. Ye’s urine sample will be stored for
( _1 \! k0 M8 A+ b L+ F& x2 teight years after the contest for future testing as technology advances.
1 F7 n' G! n C6 f( S" t. T% QInnocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-
0 _! I8 T: |; }, }competition drug test is already in effect, which Callaway failed to mention3 J/ D4 Q; k( A! `6 j, A) B
. As noted in the president of WADA’s press release, drug testing for
; p4 V- y( V8 mOlympians began at least six months before the opening of the London% K2 s* ^& Y0 Q6 F
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
: [- r8 |- p8 ^9 Ddoping. That may be the reason that “everyone will pass at the Olympic- ^, e4 ^) N* F" N
games. Hardly anyone fails in competition testing” — those who did dope1 o6 o" R c* o# }7 o
have already been caught and sanctioned. Callaway is free to suggest that a. L& t K- W. f+ a) J% c
player could have doped beforehand and fooled the test at the game, but this L7 T! o4 [2 W0 P% W
possibility is certainly ruled out for Ye., a+ k/ R7 w1 E3 _& R4 A3 d- j
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Over all, even though Callaway did not falsify any data, he did (
$ j0 y; u/ e B6 \1 K1 E) Ointentionally or not) cherry-pick data that, in my view, are far too
9 s0 i. \4 u, U4 W1 |5 W9 Psuggestive to be fair and unbiased. If you want to cover a story of a$ U+ I1 M0 d L! ^+ L
suspected doping from a scientific point of view, be impartial and provide: d0 O" @# ]: P* e2 ~
all the facts for the reader to judge. You are entitled to your% w4 {3 W/ p% V! g7 W
interpretation of the facts, and the expression thereof in your piece,& Y& L: e. A/ F9 x9 C; e# \- n
explicitly or otherwise, but showing only evidence that favours your5 W3 q9 k2 k# l5 i9 \0 y; m. h! {
argument is hardly good science or journalism. Such an article in a journal% y$ z; n" W- E! u0 O" N
such as Nature is not an appropriate example of how scientific research or
$ |! `2 A( ]6 G% N! ]1 dreporting should be done. |
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