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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
3 [* y- r. M A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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* b) z7 y$ ~; w& g5 Z# V" P5 {http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html- S3 T/ r5 K, A/ B9 _, |7 n
( _! D. |1 z% EFROM 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; |7 z% r4 T' w8 s$ A
, regard as one of the most prestigious and influential physical-science" b9 S: r3 f: N$ R/ y* u
magazines — publish a thinly veiled biased article like this. Granted, this# M3 _# |0 h" j3 T i4 F: Y
is not a peer-reviewed scientific article and did not go through the; p* z- f9 }' u3 M, u
scrutiny of picking referees. But to serve as a channel for the general8 r0 |1 }' U6 b# ]9 ]
populace to be in touch with and appreciate science, the authors and editors8 Y6 [7 N* V6 P; }
should at least present the readers with facts within the proper context,' Z1 k- x3 r$ H% X6 X% q
which they blatantly failed to do." O B5 o& n& G1 f, Z
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First, to identify Ye’s performance increase, Ewen Callaway compared her
8 S2 U' ~2 Y7 m* `* a1 t) KOlympic 400-metre IM time with her performance at the World Championships in
& `# g; c6 |$ [' E* w2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
' R$ @& R6 s9 B& ?2 ]anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
% `$ A f3 U, [7 a, r3 ]! Cpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an; V7 h* t! L2 D- C7 Q9 A* m
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
! T7 I' ~/ |: D Y% k# N7 Edifference between the gold and silver medal, I see no reason for 5.38 s to
$ n6 m+ V4 n/ S0 }) Mbe treated as 7 s.
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7 r5 W! j! T( ^$ G. g5 SSecond, as previously pointed out, Ye is only 16 years old and her body is
+ R" q1 Z# a2 v% i( wstill developing. Bettering oneself by 5 seconds over two years may seem
2 J& Z8 Z" n6 N6 ximpossible for an adult swimmer, but it certainly happens among youngsters. ]# z: n1 A( H1 _
An interview with Australian gold medallist Ian Thorpe revealed that his 400
! G! A @% r. ]' r-metre freestyle time improved by 5 seconds between the ages of 15 and 16.9 N: p' ^5 G; s9 u
For regular people, including Callaway, it may be hard to imagine what an) w6 C3 x0 w; g
elite swimmer can achieve as he or she matures and undergoes scientific and
4 J X2 Q/ e2 `& Lpersistent training. But jumping to the conclusion that it is “anomalous”" Y" D' H' o2 O7 D' q0 D. N# f. a
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
) P; q+ b) X# f. ]' L0 wexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
5 X0 Z' y, n' Ithe last 50 metres, but Lochte had a huge lead in the first 300 metres, so* d) Y; L* s" Y/ H0 r( v& R
he chose not to push himself too hard and to conserve his energy for later8 ~( l9 O, w U) ?4 Y& T, v* Q; f
events (whether this conforms to the Olympic spirit and the ‘use one’s
h) P, |( z, ?best efforts to win a match’ requirement that the Badminton World# l& c3 h. Y, Q, d
Federation recently invoked to disqualify four badminton pairs is another
h4 H1 b( F: Z7 l4 `( }3 t8 y1 G* @topic worth discussing, though probably not in Nature). Ye, on the other2 H- ]% X# t+ |3 L' x
hand, was trailing behind after the first 300 metres and relied on freestyle
3 n( W, h2 ~- Q8 W W; T! S, in which she has an edge, to win the race. Failing to mention this: |0 C6 q5 l/ ` u
strategic difference, as well as the fact that Lochte is 23.25 seconds
, P6 _3 L$ m' p7 Y, s: Wfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
3 y" A3 U- r- G' U# s. Nfaster than the best man in the same sport, which sounds impossible. Putting
! {! V$ e1 h* y3 @& Uaside the gender argument, I believe this is still a leading question that7 C% s* c1 n8 Y" [% H7 f$ n: m0 L
implies to the reader that there is something fishy going on.. F% h, v! l+ n5 E+ c
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Fourth is another example of cherry-picking. In the same event, there are
# w" }1 ~' |- r$ B0 Qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93" Q4 k3 |0 {/ b0 t5 _' W0 Y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
1 q' X* |0 f1 q) k3 x; V), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
) u# o5 M, U1 m$ j! mout, if we are just talking about the last 50 metres in a 400-metre IM,( H: k9 o6 j; w, Q
Lochter is not the example I would have used if I were the author. What kind t. S3 g- [. n- ]3 N( [
of scientific rigorousness is Callaway trying to demonstrate here? Is it9 t5 R- Q* o4 ?7 }) \7 `/ m- A4 n
logical that if Lochter is the champion, we should assume that he leads in* ~5 n% [) w2 k' b3 J$ i0 Q+ d7 y4 `5 f
every split? That would be a terrible way to teach the public how science
+ W9 n- ]3 F7 y" {! i" N: Y, Cworks.8 f. F6 c+ a1 ^( f$ `" C x. b
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
. z( e3 e( Y! simplies that a drug test cannot rule out the possibility of doping. Is this
) S- y/ z5 j9 Y2 E, lkind of agnosticism what Nature really wants to teach its readers? By that
, P# J3 H, E/ j+ {6 k3 U6 dstandard, I estimate that at least half of the peer-reviewed scientific
- N" @/ V( S$ upapers in Nature should be retracted. How can one convince the editors and8 G, [( o% R, w( P9 g4 l
reviewers that their proposed theory works for every possible case? One
5 Q/ V$ _: @7 a1 Kcannot. One chooses to apply the theory to typical examples and to
/ _. ?4 m. _4 _( U* Z/ Fdemonstrate that in (hopefully) all scenarios considered, the theory works
# a: a# a7 w7 Q0 t, h7 Hto a degree, and that that should warrant publication until a counterexample
& N7 o& y5 o5 a$ H4 y! H- [ n: ?is found. I could imagine that Callaway has a sceptical mind, which is
' B/ N; t% Z* k: h4 pcrucial to scientific thinking, but that would be put to better use if he
5 d4 j4 T. H/ h* `+ X* pwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
4 ? C9 l5 D3 V2 J1 Ladvanced, non-detectable drug that the Chinese have come up with in the
6 @) t0 w# V6 L2 R1 T4 Tpast 4 years (they obviously did not have it in Beijing, otherwise why not
+ K9 k) }/ i j+ K2 v, I" [use it and woo the audience at home?), based on data and rational derivation
9 b* p7 C6 |) a; |+ L$ U# K7 _. This article, however, can be interpreted as saying that all athletes are
6 u( G, C0 N. W3 Y; \doping and the authorities are just not good enough to catch them. That may# H& _8 S- v& T# a% F) a+ z
be true, logically, but definitely will not make the case if there is ever a( E0 l9 G8 \8 R$ f, h
hearing by the governing body for water sports, FINA, to determine if Ye
_: V6 W( X) y; C9 e4 j/ v1 ehas doped. To ask whether it is possible to obtain a false negative in a% ~6 C0 t, ^) c8 i, S2 t
drug test looks like a rigged question to me. Of course it is possible:1 q; s2 u5 f6 ~2 H& {; b* [+ K
other than the athlete taking a drug that the test is not designed to detect
# N+ A7 q7 u/ P- ^/ h( h H, anyone who has taken quantum 101 will tell you that everything is
! Y" b% ]8 c$ b, M Eprobabilistic in nature, and so there is a probability that the drug in an. }+ y; _5 o! a9 C& m$ {
athlete’s system could tunnel out right at the moment of the test. A slight! U9 G9 _2 K! r* d; w0 o
chance it may be, but should we disregard all test results because of it?, e1 m& C& q" R; Y# R4 l# C3 T; b2 f
Let’s be practical and reasonable, and accept that the World Anti-Doping
( W" v z8 q7 b! b, e/ magency (WADA) is competent at its job. Ye’s urine sample will be stored for
3 z7 y! z* _0 ^( oeight years after the contest for future testing as technology advances.
0 O& W5 F* ~% p B/ i8 zInnocent until proven guilty, shouldn’t it be?# A8 f7 W( l/ u% f1 n5 K% P
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Sixth, and the last point I would like to make, is that the out-of-+ S) d2 W1 Q# H: |7 i C( S: F6 r
competition drug test is already in effect, which Callaway failed to mention
; ]4 s6 ]/ t. |% |0 [1 D. As noted in the president of WADA’s press release, drug testing for
" A% w- _9 o8 `Olympians began at least six months before the opening of the London
5 J$ ~) V! K' |% M# {# fOlympics. Furthermore, 107 athletes have been banned from this Olympics for$ t& G o# ]! i' o
doping. That may be the reason that “everyone will pass at the Olympic
$ T; h# Z5 p% ^$ Mgames. Hardly anyone fails in competition testing” — those who did dope
( a4 e( u. N7 n; W* m/ Nhave already been caught and sanctioned. Callaway is free to suggest that a
0 W+ A. I4 n* C! ]7 T! bplayer could have doped beforehand and fooled the test at the game, but this9 E# g& J6 H0 o# u9 P# L
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (3 A$ m3 S. j8 j8 t$ S) B$ n
intentionally or not) cherry-pick data that, in my view, are far too5 B! h# k) I* J2 A6 K% _: q
suggestive to be fair and unbiased. If you want to cover a story of a
" X- v: N. K% Q. _3 {suspected doping from a scientific point of view, be impartial and provide
+ m9 j. w( f3 B5 U! J1 c \' iall the facts for the reader to judge. You are entitled to your
# q+ f2 n2 M( N7 e$ M# Kinterpretation of the facts, and the expression thereof in your piece,& d5 T( @. q" Z. K3 W
explicitly or otherwise, but showing only evidence that favours your% f7 t: |, E- ?. i6 y/ `
argument is hardly good science or journalism. Such an article in a journal. C6 N: P: J! l+ S5 Y/ K. m
such as Nature is not an appropriate example of how scientific research or, L: f4 Q) {; C; G
reporting should be done. |
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