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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 JIANG7 w- ^" n( V( R1 y) O
如果是中国长大的,英语能到这种程度真是很不简单。9 K$ f; T) `$ b
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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- O4 n* T+ s# z- r4 }+ N( J3 M" e0 ^. `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 myself3 }1 w$ D5 M/ J
, regard as one of the most prestigious and influential physical-science4 Y+ W9 [* @2 b |9 K' M
magazines — publish a thinly veiled biased article like this. Granted, this! H, p6 T9 o- ]5 |
is not a peer-reviewed scientific article and did not go through the/ _6 E) l4 f! _9 U
scrutiny of picking referees. But to serve as a channel for the general5 l7 j) K4 ?7 d" C- ~9 M
populace to be in touch with and appreciate science, the authors and editors* ]2 i: \8 c! C$ Z
should at least present the readers with facts within the proper context," v# B- g) {+ ?1 y5 h
which they blatantly failed to do.
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) _ k! {0 ^( l, W+ ZFirst, to identify Ye’s performance increase, Ewen Callaway compared her
' ?$ {) t7 m; ^2 f6 yOlympic 400-metre IM time with her performance at the World Championships in
( E; T! e( j/ y" H" W/ b( s1 C2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “6 v# x/ ?' h# V+ x, H! v! Y0 H
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
. S' t/ ]9 X4 S: {# m: D4 A9 Upersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
! V, ?$ l3 L+ r: Z5 c2 Q# T$ y. O% uimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
* J* Z8 s- R: S$ A7 gdifference between the gold and silver medal, I see no reason for 5.38 s to$ O- a- c+ e$ X. V2 X: g7 G- }5 K
be treated as 7 s.% K7 o4 v/ W! E
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Second, as previously pointed out, Ye is only 16 years old and her body is
( \# ^5 T3 H5 ^- zstill developing. Bettering oneself by 5 seconds over two years may seem$ X( e" o" M# f. |( P% [1 m
impossible for an adult swimmer, but it certainly happens among youngsters.6 @, I! G) ^8 x$ S0 F
An interview with Australian gold medallist Ian Thorpe revealed that his 4000 X( k3 a' ]: v& L9 I( I
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
6 s; {- F2 M$ a9 }. \5 L4 A4 FFor regular people, including Callaway, it may be hard to imagine what an
; @5 a" J: P9 _1 Oelite swimmer can achieve as he or she matures and undergoes scientific and
6 x1 e$ ]1 e, D' T |+ B" jpersistent training. But jumping to the conclusion that it is “anomalous”
3 f' p+ z6 p" \ K0 i Dbased 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+ u8 _, \) h/ N9 l+ U: i1 f7 [
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
L; v& y, O5 y! jthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
3 q6 X5 y2 t1 x" ~! }he chose not to push himself too hard and to conserve his energy for later" y$ p" t9 C# w) h- h
events (whether this conforms to the Olympic spirit and the ‘use one’s+ q# Z+ u9 c, m A+ K9 j8 }* ~. a& V
best efforts to win a match’ requirement that the Badminton World1 H' t9 G# c% T' N5 R9 A; P7 O
Federation recently invoked to disqualify four badminton pairs is another
2 P9 z/ a8 K: @9 s* Qtopic worth discussing, though probably not in Nature). Ye, on the other
" f* [. Q$ s6 d1 @! thand, was trailing behind after the first 300 metres and relied on freestyle
; w$ A4 K) C- S9 t9 s, in which she has an edge, to win the race. Failing to mention this B T W. Z8 u) _7 {" y( \
strategic difference, as well as the fact that Lochte is 23.25 seconds4 I- s8 U! O1 n; K; q1 l0 O
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
- P& P. V [/ g# Wfaster than the best man in the same sport, which sounds impossible. Putting0 A& X- ?) v$ a: f, I7 @" }* b3 |
aside the gender argument, I believe this is still a leading question that& L+ F( O: ]6 B4 l/ u6 w$ S
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
) J" I6 t" V9 Qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.930 h. p/ `2 C) ]. q1 d" R/ d% W3 s+ f
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
5 u* } N) c8 H t/ |+ h% @), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns3 p) r% w. E& [: T
out, if we are just talking about the last 50 metres in a 400-metre IM,6 d% ]/ w7 M. ?0 q
Lochter is not the example I would have used if I were the author. What kind
' S: A+ G# k% @6 _of scientific rigorousness is Callaway trying to demonstrate here? Is it
' ~0 T0 ?; j: J0 D2 q5 i' V5 c( Vlogical that if Lochter is the champion, we should assume that he leads in1 `+ Y6 V( k8 Y# V
every split? That would be a terrible way to teach the public how science, q* z* j8 k' @% v% `0 X/ [/ q
works.
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3 G: E3 {( M# u( x0 ]Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and5 G8 [ X- S; q5 k' a
implies that a drug test cannot rule out the possibility of doping. Is this8 O% Z9 R% l/ U; x4 Q! B- e' c- s
kind of agnosticism what Nature really wants to teach its readers? By that; @4 B) m d3 j1 i$ e2 c" Z
standard, I estimate that at least half of the peer-reviewed scientific
$ o$ P, W1 V2 d- Npapers in Nature should be retracted. How can one convince the editors and& y& p2 v3 z) m1 c0 J' i+ z
reviewers that their proposed theory works for every possible case? One
0 [. E- M" ` _5 Icannot. One chooses to apply the theory to typical examples and to$ |+ q& h& J t# d5 J/ G
demonstrate that in (hopefully) all scenarios considered, the theory works
; l/ X6 h0 g- w; w: q" lto a degree, and that that should warrant publication until a counterexample
$ p6 I% Z. ?5 S$ j$ C2 ]- N1 Ais found. I could imagine that Callaway has a sceptical mind, which is
2 A8 N- Q5 t2 I. icrucial to scientific thinking, but that would be put to better use if he
) g$ P) b2 |8 Bwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly! Z4 ~% ^* ?4 ]; ` Q
advanced, non-detectable drug that the Chinese have come up with in the* [- G& l2 o& W% I" n1 p' z: ^6 H. I' q
past 4 years (they obviously did not have it in Beijing, otherwise why not5 A/ Y9 v% O% L6 g) G
use it and woo the audience at home?), based on data and rational derivation
0 C* Z, z* l: s9 c4 i( {" y. This article, however, can be interpreted as saying that all athletes are) e+ r$ T+ L& G7 X0 e4 K3 y
doping and the authorities are just not good enough to catch them. That may' r/ @; k U$ b. `
be true, logically, but definitely will not make the case if there is ever a
" M$ L v! S3 z/ e7 K8 shearing by the governing body for water sports, FINA, to determine if Ye
& O) w$ J; k- b+ Thas doped. To ask whether it is possible to obtain a false negative in a
# Q2 K8 t9 H4 I9 ?9 S) bdrug test looks like a rigged question to me. Of course it is possible:! `5 W- O! d* T& O+ P
other than the athlete taking a drug that the test is not designed to detect' q T u6 x& v6 `0 \4 J0 z
, anyone who has taken quantum 101 will tell you that everything is, y4 ?8 ^/ C7 n0 c: S' e
probabilistic in nature, and so there is a probability that the drug in an7 U, ]+ R/ J4 s0 a4 A$ ]
athlete’s system could tunnel out right at the moment of the test. A slight
' p; ]" T- T4 e4 _5 _chance it may be, but should we disregard all test results because of it?! Q( r8 T4 V l0 ~, a3 H
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 m. g5 P: {5 r( q6 I2 bagency (WADA) is competent at its job. Ye’s urine sample will be stored for- W4 E3 _( W( L. p, e2 O9 \
eight years after the contest for future testing as technology advances.
K3 d2 t9 U- V: i1 j, e4 QInnocent until proven guilty, shouldn’t it be?
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* \; M9 J4 M* @" Q, h% c: ASixth, and the last point I would like to make, is that the out-of- B$ R# A A, b" L4 y5 ]+ I
competition drug test is already in effect, which Callaway failed to mention
' E& n4 }4 n, j8 _. As noted in the president of WADA’s press release, drug testing for2 _' ?0 _! j: w& z" n" [
Olympians began at least six months before the opening of the London. m, g8 D3 E. |( _) a7 T2 Y
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
# q% d6 v2 M5 R3 }% x. [doping. That may be the reason that “everyone will pass at the Olympic- C' t- ^% F( Z
games. Hardly anyone fails in competition testing” — those who did dope) ^3 E& w7 x) U4 e( x) {
have already been caught and sanctioned. Callaway is free to suggest that a) X9 N! p6 @2 `) y5 _& q7 M! G
player could have doped beforehand and fooled the test at the game, but this
( y0 ^& v' m+ Dpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
' P3 n ^, Z, _: zintentionally or not) cherry-pick data that, in my view, are far too
& G, v: [4 X; X9 I7 y9 O& s9 p4 qsuggestive to be fair and unbiased. If you want to cover a story of a4 P0 }. N0 L' D. R$ z9 `: b1 ]
suspected doping from a scientific point of view, be impartial and provide
6 S6 r+ V! D1 R. }$ x& E6 {# Oall the facts for the reader to judge. You are entitled to your
' h9 K& f9 S" d- a- Qinterpretation of the facts, and the expression thereof in your piece,7 Y6 `/ e8 ~1 a! J" Z+ `: v
explicitly or otherwise, but showing only evidence that favours your6 k; U! t" W8 j# b
argument is hardly good science or journalism. Such an article in a journal
' n' A# W7 k6 nsuch as Nature is not an appropriate example of how scientific research or7 B- d/ @/ G0 K2 Q2 S7 s* l
reporting should be done. |
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