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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. Z; d5 Z4 N7 t9 x0 _. N
如果是中国长大的,英语能到这种程度真是很不简单。
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: k, ^# q, a, c: I- {7 G& Mhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html% x3 `( w5 w2 ]9 Y6 j0 O' ?8 D
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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: i6 k' A$ \- f: A
, regard as one of the most prestigious and influential physical-science
) _' W. T! d4 z$ b h7 Vmagazines — publish a thinly veiled biased article like this. Granted, this
9 F3 f" j% P6 V4 @( [ Nis not a peer-reviewed scientific article and did not go through the
; J. d! J* [) F# ~scrutiny of picking referees. But to serve as a channel for the general
- q& P/ C' r: R h" Npopulace to be in touch with and appreciate science, the authors and editors
$ M& L! w( i! t* D6 f. Xshould at least present the readers with facts within the proper context,
3 { p. U9 P: r& [+ Ewhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her! K: D, S$ I+ D; l
Olympic 400-metre IM time with her performance at the World Championships in
K4 ^$ z. |5 x$ J2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
7 d$ W! B6 F1 F zanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
* C; r" P; \; g% o* qpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an7 @( P; j1 X* g) j5 e/ N
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the7 X5 ^& q% i. `+ A) r
difference between the gold and silver medal, I see no reason for 5.38 s to5 ]' i" p/ E% f/ P o6 k' }/ L
be treated as 7 s.
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9 z4 r, b5 b1 \/ R8 w7 l+ BSecond, as previously pointed out, Ye is only 16 years old and her body is% w: p' Q6 r/ b, M/ [- Z
still developing. Bettering oneself by 5 seconds over two years may seem" \0 u9 u& Q! u3 h6 u) h9 E
impossible for an adult swimmer, but it certainly happens among youngsters.3 Z* J9 x2 [0 s1 J9 Q2 H @
An interview with Australian gold medallist Ian Thorpe revealed that his 400. s4 M% i5 r! l c2 o
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.% b* J9 g) L4 L: }* d
For regular people, including Callaway, it may be hard to imagine what an
" i# I3 x+ W+ y0 yelite swimmer can achieve as he or she matures and undergoes scientific and
5 f0 C/ f3 p, T; u$ _! jpersistent training. But jumping to the conclusion that it is “anomalous”" k" D; _) {0 |& Q$ D
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook$ b, ]) y W( V* [/ W& T3 r6 n
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in' n, f1 q/ h: p% P" T
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so f! |/ k* [, Q* ?
he chose not to push himself too hard and to conserve his energy for later5 C6 \9 j, I/ ]; I4 K! Z
events (whether this conforms to the Olympic spirit and the ‘use one’s
. L8 D, E1 m# g. c: X* Y" f# ^best efforts to win a match’ requirement that the Badminton World" \: s6 \. u% M9 o% A
Federation recently invoked to disqualify four badminton pairs is another
/ P* J, z: ~( N7 f* K( ntopic worth discussing, though probably not in Nature). Ye, on the other- Z9 x: G$ [6 i/ l+ Y) g6 i/ @
hand, was trailing behind after the first 300 metres and relied on freestyle4 p3 b& k8 ]# n4 e3 O/ k& r# q
, in which she has an edge, to win the race. Failing to mention this) F- q( ~3 w3 N/ p
strategic difference, as well as the fact that Lochte is 23.25 seconds* \( _ v# {/ E! p: V
faster (4:05.18) than Ye overall, creates the illusion that a woman swam9 A/ s. d; h% ~5 E7 e5 h
faster than the best man in the same sport, which sounds impossible. Putting+ K( T j! f- A/ s: d& \
aside the gender argument, I believe this is still a leading question that* ]# r8 O# V! h$ H2 [
implies to the reader that there is something fishy going on.! O9 p. ]6 z% {3 Y- J$ D
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Fourth is another example of cherry-picking. In the same event, there are, w2 Y7 I- o; h! x/ K/ A9 C! b
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 k n; \8 C3 D- [5 Y7 Ss) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s7 r# X; |9 b& x+ |$ K
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns) O5 `. e; C8 K" c8 }; K
out, if we are just talking about the last 50 metres in a 400-metre IM,8 \9 E Z) x% _$ @
Lochter is not the example I would have used if I were the author. What kind
: L+ m- I$ M" Rof scientific rigorousness is Callaway trying to demonstrate here? Is it
( j. V0 n" L, o( f+ ^- m4 M" ?logical that if Lochter is the champion, we should assume that he leads in
" O$ Q8 z% c) U* G- nevery split? That would be a terrible way to teach the public how science
8 _' V6 |- U+ Y. O' D9 ?works.$ Z, d% n; ?$ ]- }& v
4 A5 z/ ^& z4 X& f7 p9 z9 WFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
9 ]! h/ w7 X# I! ~$ p) g8 G- Gimplies that a drug test cannot rule out the possibility of doping. Is this6 R, v0 ?/ n8 M2 L1 _3 ~4 F
kind of agnosticism what Nature really wants to teach its readers? By that4 A1 ~- \9 }' ?" g9 P
standard, I estimate that at least half of the peer-reviewed scientific
- @' ^) u2 C. `5 Rpapers in Nature should be retracted. How can one convince the editors and" a/ M5 {# u) {) t& L
reviewers that their proposed theory works for every possible case? One
0 M/ a$ M3 `$ Xcannot. One chooses to apply the theory to typical examples and to+ ? f' }' J9 }0 U+ Q! O8 g4 F6 R
demonstrate that in (hopefully) all scenarios considered, the theory works
/ y6 k: J' ?$ l: [1 w* w& yto a degree, and that that should warrant publication until a counterexample
& @8 g: e, z% c' {8 }0 n; m4 ?is found. I could imagine that Callaway has a sceptical mind, which is
- n2 }$ r+ [+ z" [; D1 V6 hcrucial to scientific thinking, but that would be put to better use if he) g3 S7 E) Z6 q) N: [* x7 v/ o
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly3 D# H0 y2 g+ M5 Y. B
advanced, non-detectable drug that the Chinese have come up with in the
3 L2 U9 G: j8 t! Ypast 4 years (they obviously did not have it in Beijing, otherwise why not" R( D3 i5 B `+ i5 n
use it and woo the audience at home?), based on data and rational derivation% G% E3 Z/ q+ U
. This article, however, can be interpreted as saying that all athletes are
1 H8 ^, }( E5 G4 jdoping and the authorities are just not good enough to catch them. That may
: n: n8 }. l% Qbe true, logically, but definitely will not make the case if there is ever a
* T, ~1 V7 l5 E! R. Hhearing by the governing body for water sports, FINA, to determine if Ye
" X8 A; x7 {1 I+ U9 }has doped. To ask whether it is possible to obtain a false negative in a. R0 {. E* P! X( [4 a! H
drug test looks like a rigged question to me. Of course it is possible:) Y' K4 f: G( \3 i1 |) J
other than the athlete taking a drug that the test is not designed to detect
9 a9 f* Y& w/ ?' L, anyone who has taken quantum 101 will tell you that everything is' f8 q( B) l6 N9 X3 E7 D! u2 A
probabilistic in nature, and so there is a probability that the drug in an
2 |/ l7 J7 i5 G3 I! D1 Wathlete’s system could tunnel out right at the moment of the test. A slight
- h$ Z6 m$ P8 E4 d& R: m% G8 lchance it may be, but should we disregard all test results because of it?0 z/ N7 u- a9 _- q% Q/ _
Let’s be practical and reasonable, and accept that the World Anti-Doping
1 ~0 d, R" {3 k* `- w' u+ f) aagency (WADA) is competent at its job. Ye’s urine sample will be stored for
# g; W+ u% S! \eight years after the contest for future testing as technology advances.
* @% {, m4 S( R+ n& O I: TInnocent 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-
! C# t4 Y, n: ]# M+ a7 F; Wcompetition drug test is already in effect, which Callaway failed to mention
; }, s: T8 I* C+ O" i- `+ W) O. As noted in the president of WADA’s press release, drug testing for% p$ F( A) m- E# }0 { m1 ^
Olympians began at least six months before the opening of the London9 I1 E1 `* K4 \6 F7 G# T) m
Olympics. Furthermore, 107 athletes have been banned from this Olympics for% U6 D; t" u& g2 @
doping. That may be the reason that “everyone will pass at the Olympic! G! G$ X# X# I9 `: g* {
games. Hardly anyone fails in competition testing” — those who did dope5 N) h7 u7 J3 y0 z8 J. ]
have already been caught and sanctioned. Callaway is free to suggest that a6 w% \5 F3 H. c4 a
player could have doped beforehand and fooled the test at the game, but this; u" A7 @( a; S( s
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (6 W; q! ?: o A$ M/ ?
intentionally or not) cherry-pick data that, in my view, are far too( U; ^# h1 O* t; l+ o" I" X- W
suggestive to be fair and unbiased. If you want to cover a story of a
5 a& \$ i. r' C7 G9 x Bsuspected doping from a scientific point of view, be impartial and provide+ W; j V" ^( ^8 b. M& r+ ^
all the facts for the reader to judge. You are entitled to your' |' r7 e1 i9 Y/ m* Q
interpretation of the facts, and the expression thereof in your piece,
1 C$ H+ `8 S- y( b4 a6 t- D" Uexplicitly or otherwise, but showing only evidence that favours your
. T, E- X" a2 [0 wargument is hardly good science or journalism. Such an article in a journal: @6 N$ l- e, [9 @! n
such as Nature is not an appropriate example of how scientific research or
8 ^* ~: z0 N" {, F# Lreporting should be done. |
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