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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( c, E. \ b7 D
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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: M7 t. L1 H+ J( H9 y- F( }7 Q1 P- Xhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html7 N `+ H4 U2 Q9 N& x
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania* p3 s+ @6 A" A+ @0 v
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It is a shame to see Nature — which nearly all scientists, including myself$ u' ]4 B L9 W2 t T3 @
, regard as one of the most prestigious and influential physical-science+ Z3 T$ C7 k3 o
magazines — publish a thinly veiled biased article like this. Granted, this
- H) R( W4 x- G! n. t# Vis not a peer-reviewed scientific article and did not go through the( F' X/ ?" }6 u" a9 J# M* w" x& _4 G
scrutiny of picking referees. But to serve as a channel for the general! i; r& ]9 w5 c
populace to be in touch with and appreciate science, the authors and editors
2 g8 h2 l- h+ F/ z8 _" O* Dshould at least present the readers with facts within the proper context,9 m* S9 h, h3 K& T. X7 Q9 _/ P
which they blatantly failed to do.
: [8 k- J3 p' y/ |; R& U* X8 F7 M4 F2 R3 y9 g3 A8 N. D" r& I; w
First, to identify Ye’s performance increase, Ewen Callaway compared her I2 z1 ]9 X& h' p
Olympic 400-metre IM time with her performance at the World Championships in P/ V# |% H3 x
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “6 F: A7 V9 D8 s6 O. d* p
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
6 _# _; \1 Z4 ]& v# Ppersonal best was 4:33.79 at the Asian Games in 2010. This leads to an2 C* u4 f. p4 D- N- U- z: x1 D$ ?
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the& k8 c, ?1 l9 ^
difference between the gold and silver medal, I see no reason for 5.38 s to
" Z9 W. ?8 O+ U g! P2 `& D8 Tbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is' B7 L6 P! U/ n: w9 D- p
still developing. Bettering oneself by 5 seconds over two years may seem
3 v" P( [# M+ [5 D! wimpossible for an adult swimmer, but it certainly happens among youngsters.
' q( F* m2 C! {4 W8 K0 x' WAn interview with Australian gold medallist Ian Thorpe revealed that his 4007 ]) X1 T- d! e% @2 ~! Z5 _
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
0 P: Y; t" W9 s( Q7 dFor regular people, including Callaway, it may be hard to imagine what an/ |' A: h# s5 |1 ^6 E/ c: K
elite swimmer can achieve as he or she matures and undergoes scientific and9 L) `3 R! Q/ g% D" E# V4 a
persistent training. But jumping to the conclusion that it is “anomalous”
# H* U" Y2 m; D" P/ R* kbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.' z/ ]) f, c0 M d }; X# t# O
) z% f/ N/ q" x* U6 kThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook2 g0 k4 b2 q8 F
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in# M, A6 \8 T. t. R7 c
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
0 O, R: a1 z% u: Dhe chose not to push himself too hard and to conserve his energy for later# ~; N( E& s3 [5 y4 v
events (whether this conforms to the Olympic spirit and the ‘use one’s% I; V- Z4 l# h
best efforts to win a match’ requirement that the Badminton World
$ M1 | o: x& q! W9 \: T/ tFederation recently invoked to disqualify four badminton pairs is another) ~, M4 Q" ?0 _: m
topic worth discussing, though probably not in Nature). Ye, on the other
) t- s A" e( I$ | g- K4 F( h& Qhand, was trailing behind after the first 300 metres and relied on freestyle! v* B; j! M* [# f
, in which she has an edge, to win the race. Failing to mention this
8 s% b6 m' A$ P) O, ^7 j: Ystrategic difference, as well as the fact that Lochte is 23.25 seconds+ Z, r7 @4 m! i) }% O. n9 m- f
faster (4:05.18) than Ye overall, creates the illusion that a woman swam8 O5 I* p) \0 N5 b9 f3 l3 |
faster than the best man in the same sport, which sounds impossible. Putting ~9 }: G# N) {! Q2 v* F
aside the gender argument, I believe this is still a leading question that: L4 y5 K! I) d; \
implies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are, Z; r, j0 \( h( V. }
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.934 n: A5 m9 m; B, @0 K) V
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s2 F- { Q. w7 N' I) S. O" M
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
* P/ K* ?5 m5 Eout, if we are just talking about the last 50 metres in a 400-metre IM,
`% W, @9 {$ x% O% D7 XLochter is not the example I would have used if I were the author. What kind
5 E3 b% `3 _$ K- g3 L nof scientific rigorousness is Callaway trying to demonstrate here? Is it ?" _* o9 i! L: |
logical that if Lochter is the champion, we should assume that he leads in0 W, e9 f- V; L$ r; x/ e
every split? That would be a terrible way to teach the public how science
/ s' X5 ]' g2 kworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and: ^* x. S( f3 I# s1 C5 T
implies that a drug test cannot rule out the possibility of doping. Is this
9 l2 n! p- _) @# v: f! ?, k u% zkind of agnosticism what Nature really wants to teach its readers? By that
$ h7 a7 @- \. M0 q# d3 _standard, I estimate that at least half of the peer-reviewed scientific
+ S p% [( E4 `. O) ypapers in Nature should be retracted. How can one convince the editors and! A1 K( o) l$ v& Z
reviewers that their proposed theory works for every possible case? One, B) `2 s/ B& \9 `* r0 x, ?
cannot. One chooses to apply the theory to typical examples and to
7 b" e' ]. U! Q1 o8 L* @, _: M# Wdemonstrate that in (hopefully) all scenarios considered, the theory works0 G8 `' x8 `9 w7 v @ L
to a degree, and that that should warrant publication until a counterexample
8 r6 n5 [/ e; y# g: ~is found. I could imagine that Callaway has a sceptical mind, which is3 X. q0 J! Y3 c% F) J& w
crucial to scientific thinking, but that would be put to better use if he$ O6 c, d) T" N# h8 z P" y" u
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly, j0 T, w. k! r6 }3 Q7 X
advanced, non-detectable drug that the Chinese have come up with in the+ R# C9 v( c8 `; T5 L7 ]* G7 D! y
past 4 years (they obviously did not have it in Beijing, otherwise why not5 h: k' p8 |! j( R5 T6 m8 J
use it and woo the audience at home?), based on data and rational derivation: w2 F: v3 ?0 T, Z
. This article, however, can be interpreted as saying that all athletes are
, e6 ^% {. Z4 b) gdoping and the authorities are just not good enough to catch them. That may
* ~# N9 B# N2 L2 Hbe true, logically, but definitely will not make the case if there is ever a
. g) k8 S1 U1 V& u9 r: H4 a/ ?* A& shearing by the governing body for water sports, FINA, to determine if Ye
- h7 b" `, L2 X3 V8 ^has doped. To ask whether it is possible to obtain a false negative in a' w% k+ h% q# w. f; v3 ~
drug test looks like a rigged question to me. Of course it is possible:
* ?9 c! U: n9 y/ B) R/ Wother than the athlete taking a drug that the test is not designed to detect
$ b$ R/ a/ u# Y6 ^ J4 K$ _5 m, anyone who has taken quantum 101 will tell you that everything is+ O6 J8 S" o0 p: n- a$ p! g1 t
probabilistic in nature, and so there is a probability that the drug in an* h& M. u+ f3 k9 u) _) F
athlete’s system could tunnel out right at the moment of the test. A slight( ?2 X3 O5 Z2 V }$ O7 k
chance it may be, but should we disregard all test results because of it?
J" r/ J9 N) lLet’s be practical and reasonable, and accept that the World Anti-Doping
2 `! A9 l" S$ X; w. G& _agency (WADA) is competent at its job. Ye’s urine sample will be stored for
$ w- U9 `! ]0 O! J! ^ G% v& reight years after the contest for future testing as technology advances.% L/ W3 y, {* Y7 U9 T' c; }
Innocent 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-
+ u$ l" [- |1 C1 W& n+ r+ ^competition drug test is already in effect, which Callaway failed to mention
9 Y( s( N% E- q( ^! x: Q. As noted in the president of WADA’s press release, drug testing for
$ U( S+ o. Q" i* c; VOlympians began at least six months before the opening of the London
# C4 P+ p- u8 Q! UOlympics. Furthermore, 107 athletes have been banned from this Olympics for8 P. n4 p9 `; O" }2 f
doping. That may be the reason that “everyone will pass at the Olympic! P& {$ D0 T F* I, Z
games. Hardly anyone fails in competition testing” — those who did dope/ Y* Z2 h+ A' X$ |2 z* r1 o
have already been caught and sanctioned. Callaway is free to suggest that a- s2 d" L1 J* g
player could have doped beforehand and fooled the test at the game, but this
( E; `) S! R9 H4 a( r$ R/ Bpossibility is certainly ruled out for Ye.: M( S5 A+ b/ J* q9 D1 X3 t/ E- k
+ q8 M$ q+ N- m& Y$ wOver all, even though Callaway did not falsify any data, he did (0 ~. |" O) ]$ d& ^- Q
intentionally or not) cherry-pick data that, in my view, are far too4 ]2 v# ]7 Y8 c, X' B$ v2 [
suggestive to be fair and unbiased. If you want to cover a story of a
8 l9 U7 b$ _2 d# b2 Q, c3 esuspected doping from a scientific point of view, be impartial and provide6 r x% \6 {9 F3 g7 l
all the facts for the reader to judge. You are entitled to your9 U. k* W7 S- v# B' S1 d6 f
interpretation of the facts, and the expression thereof in your piece,
1 r7 H, O1 f Y' i. u! |5 hexplicitly or otherwise, but showing only evidence that favours your
7 H0 G5 V3 o9 l7 a1 K5 o5 uargument is hardly good science or journalism. Such an article in a journal6 B0 C* \2 n' G/ H
such as Nature is not an appropriate example of how scientific research or
8 \; t' ]4 I/ K/ Yreporting should be done. |
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