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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
, o8 _# Y4 m8 M如果是中国长大的,英语能到这种程度真是很不简单。) j- z) ^: [' Z4 q2 ~' k
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania2 u- |5 L" M# T- D/ \
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It is a shame to see Nature — which nearly all scientists, including myself2 O" a3 ~) M$ Y5 F, s0 R
, regard as one of the most prestigious and influential physical-science3 ~3 u. t4 k8 t: V. G- {
magazines — publish a thinly veiled biased article like this. Granted, this
% d4 G( q- b1 v% T7 e9 F' Fis not a peer-reviewed scientific article and did not go through the! k* L4 f @) L6 M' c) c* @7 J, r
scrutiny of picking referees. But to serve as a channel for the general: D( S3 n3 g" M1 c
populace to be in touch with and appreciate science, the authors and editors
1 o" P' u$ f- O+ [' s/ n! bshould at least present the readers with facts within the proper context,# m+ a/ r% m* `2 w
which they blatantly failed to do.; y& }' N8 B' R5 _; F) ~
/ Q" G, t8 H2 _2 I+ \4 D# hFirst, to identify Ye’s performance increase, Ewen Callaway compared her7 H$ o3 J. I' g3 {. O: o
Olympic 400-metre IM time with her performance at the World Championships in
l, a, ]. l5 T. x# N2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
" i' `! |$ R7 k8 @; L) qanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
9 `' E: L- Y$ n* M7 e/ g& _ n0 {personal best was 4:33.79 at the Asian Games in 2010. This leads to an
! N! h7 X3 N1 ~0 P' c% C- pimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
) O8 H: n8 J. G8 Y" t1 l! l" o. T" Adifference between the gold and silver medal, I see no reason for 5.38 s to$ }- L- D7 Q# V- b9 b
be treated as 7 s.& _, T& o+ O3 H: X8 s# M& W, y( T
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Second, as previously pointed out, Ye is only 16 years old and her body is
/ G- J$ K+ ^! Z. j1 ustill developing. Bettering oneself by 5 seconds over two years may seem1 J% j" B$ _) c U' \
impossible for an adult swimmer, but it certainly happens among youngsters.
7 O/ R4 |0 s' l8 KAn interview with Australian gold medallist Ian Thorpe revealed that his 400( |$ \ e0 j' A2 y
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
2 E7 O! j0 b. s4 W4 B; a+ kFor regular people, including Callaway, it may be hard to imagine what an
+ e# ~$ f3 B# lelite swimmer can achieve as he or she matures and undergoes scientific and
5 I# G" w* M! \persistent training. But jumping to the conclusion that it is “anomalous”/ y& w; q0 t+ e7 {0 D9 y+ W! s
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* y) d+ K' l# J1 g* t2 y3 X
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in) |: p# L& l" f* b& h4 a4 o( J
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so! P8 ^3 b9 a. j c5 _- d
he chose not to push himself too hard and to conserve his energy for later
( h0 D& c8 J0 ^% s/ |. i1 S- F' ]events (whether this conforms to the Olympic spirit and the ‘use one’s* S, \/ u- {8 D7 u
best efforts to win a match’ requirement that the Badminton World: F5 b- w& @ ~$ w; s5 V4 {
Federation recently invoked to disqualify four badminton pairs is another! Z3 K$ F2 q' B% Z& S$ R% x0 p
topic worth discussing, though probably not in Nature). Ye, on the other' O# _ J6 N2 h- v3 D( ~" s' T
hand, was trailing behind after the first 300 metres and relied on freestyle
8 @7 v$ Q& a& I, in which she has an edge, to win the race. Failing to mention this" N) l p8 ]9 p, T5 {2 c
strategic difference, as well as the fact that Lochte is 23.25 seconds" P& c# }) n2 N" `9 j
faster (4:05.18) than Ye overall, creates the illusion that a woman swam+ I" }" ~0 s2 E& K
faster than the best man in the same sport, which sounds impossible. Putting5 @+ C2 M! L! |9 N( u& j
aside the gender argument, I believe this is still a leading question that
4 D* R, @$ }( [1 D+ Fimplies to the reader that there is something fishy going on.
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( H# V3 N% w( b I! g7 wFourth is another example of cherry-picking. In the same event, there are
/ C' W. H' q: w8 `3 [four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
1 W6 i7 @1 w, I! P2 I X8 q' ts) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
4 ?& M9 F( D1 a+ R9 ^, r* s8 T/ g), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns8 D ~( a0 L+ F
out, if we are just talking about the last 50 metres in a 400-metre IM,, ^* p; n) g. N' X) ~
Lochter is not the example I would have used if I were the author. What kind
8 u* w9 p Z/ u/ _+ {4 fof scientific rigorousness is Callaway trying to demonstrate here? Is it
( [$ y& K' `& `8 a1 ^0 Zlogical that if Lochter is the champion, we should assume that he leads in8 u6 a5 j! w8 U. w& g
every split? That would be a terrible way to teach the public how science) k( d. p- E* @$ k6 U
works.8 Y3 V: r. E! \
% @' g. V- `7 F. |; F' rFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
5 N, A2 o& x% ]1 W) O fimplies that a drug test cannot rule out the possibility of doping. Is this
3 @ a; G! M5 U. x2 G' Gkind of agnosticism what Nature really wants to teach its readers? By that# E2 F! I( i# c5 X1 G- j. b0 `4 L
standard, I estimate that at least half of the peer-reviewed scientific
" W) G( f f" O1 Z! J0 g7 W8 Upapers in Nature should be retracted. How can one convince the editors and5 Q$ o4 o: e* V: Y0 E" q* @
reviewers that their proposed theory works for every possible case? One
0 }+ A4 S b& m. c% Rcannot. One chooses to apply the theory to typical examples and to7 R* L" V; D9 I. N0 ?& F
demonstrate that in (hopefully) all scenarios considered, the theory works5 R% g4 | S# h( k
to a degree, and that that should warrant publication until a counterexample) `3 w4 P- u5 X* g- N" y3 Y* b
is found. I could imagine that Callaway has a sceptical mind, which is( C$ D" S! p: o5 o
crucial to scientific thinking, but that would be put to better use if he
; W5 d0 r. O4 |, E3 F' owrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
; j/ Y+ @6 ~8 A5 t; U" ?advanced, non-detectable drug that the Chinese have come up with in the
0 v8 C8 A" G' K- j. b; R& cpast 4 years (they obviously did not have it in Beijing, otherwise why not7 V0 i9 X& j T! M( G, y7 {
use it and woo the audience at home?), based on data and rational derivation
# M- F& b; r0 D. This article, however, can be interpreted as saying that all athletes are1 k/ E5 W/ ] Y2 h
doping and the authorities are just not good enough to catch them. That may8 y& N; j7 K1 Z0 R5 {9 P
be true, logically, but definitely will not make the case if there is ever a5 [. W4 P* Q7 h3 n) t
hearing by the governing body for water sports, FINA, to determine if Ye5 T8 N; G( c% B2 q% `
has doped. To ask whether it is possible to obtain a false negative in a
) Q/ |% l& J( a3 ddrug test looks like a rigged question to me. Of course it is possible:+ J) f3 C8 U. I' A, i
other than the athlete taking a drug that the test is not designed to detect
- M! c/ {' R) l. k' j& t1 l6 M( q4 d, anyone who has taken quantum 101 will tell you that everything is
+ E% _% a# D2 Y5 ~* mprobabilistic in nature, and so there is a probability that the drug in an
7 s0 {: @! W" n# \5 r+ Hathlete’s system could tunnel out right at the moment of the test. A slight9 a" a& Z! }" q( w2 }, C
chance it may be, but should we disregard all test results because of it?
) @: Y K, P7 l3 ?Let’s be practical and reasonable, and accept that the World Anti-Doping
3 e" a( X/ r9 C' Hagency (WADA) is competent at its job. Ye’s urine sample will be stored for
) C# v$ X) P8 ?/ [7 T9 Oeight years after the contest for future testing as technology advances.% g9 Y* s' ~7 m; X0 }
Innocent until proven guilty, shouldn’t it be?% n; B: n7 ^( `3 y& u8 |& ]5 J4 t
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Sixth, and the last point I would like to make, is that the out-of-% E' `* m' Q7 ?
competition drug test is already in effect, which Callaway failed to mention4 v: k6 X* q5 l0 T7 Z) G; ~! o. H8 b
. As noted in the president of WADA’s press release, drug testing for
. w- o1 \8 y1 W, H8 y; ~Olympians began at least six months before the opening of the London4 T' m; X5 _ I
Olympics. Furthermore, 107 athletes have been banned from this Olympics for$ \4 U" Q' j) y
doping. That may be the reason that “everyone will pass at the Olympic
7 B" o$ C; ?; z$ J3 Ygames. Hardly anyone fails in competition testing” — those who did dope4 s, {- g3 ~7 ?
have already been caught and sanctioned. Callaway is free to suggest that a( D" I0 t6 D0 L1 Y* I$ O# a
player could have doped beforehand and fooled the test at the game, but this
% |' S3 G9 [( h9 I+ apossibility is certainly ruled out for Ye.% S9 l/ h( X7 g3 H% l, T _1 a
n; S, i, N7 B: N$ rOver all, even though Callaway did not falsify any data, he did (
: X% f& ^2 H) K1 Q6 s4 Ointentionally or not) cherry-pick data that, in my view, are far too6 I6 ?3 `$ y' |/ Q, g
suggestive to be fair and unbiased. If you want to cover a story of a
& i( ~. k0 U( Z+ j1 p/ @. m6 H: bsuspected doping from a scientific point of view, be impartial and provide
6 ~7 W! [6 w: N0 f! Dall the facts for the reader to judge. You are entitled to your/ u. t% k. b# a/ u, Q6 d; \5 e
interpretation of the facts, and the expression thereof in your piece,
% ~8 Q1 m" i+ w/ r! Wexplicitly or otherwise, but showing only evidence that favours your
/ k! h6 p8 d: a, B+ D- iargument is hardly good science or journalism. Such an article in a journal
! a q/ @) g# {* ?9 vsuch as Nature is not an appropriate example of how scientific research or
; U- l* H$ q! U" _4 X0 mreporting should be done. |
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