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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
4 p1 i! i+ l- ~2 `% X& X& S! m如果是中国长大的,英语能到这种程度真是很不简单。+ z& y) {# k2 J0 L
9 b9 w$ R, Y; v1 f% Thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html, C0 l# k0 |7 [
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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
) Q" \+ d) R* b, regard as one of the most prestigious and influential physical-science$ _8 S$ Z" U$ a( w1 D+ O% G
magazines — publish a thinly veiled biased article like this. Granted, this1 }$ S: i% C% d1 }
is not a peer-reviewed scientific article and did not go through the
* w$ Y0 x2 @4 l+ Z1 E7 {9 e+ lscrutiny of picking referees. But to serve as a channel for the general
+ N) d- `' W4 ?populace to be in touch with and appreciate science, the authors and editors
$ a( u0 s2 U( Nshould at least present the readers with facts within the proper context,
% v, T. M% L O/ A) E3 Dwhich they blatantly failed to do.$ s6 j6 x9 H* T# N& z. U5 J3 V5 h9 O
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First, to identify Ye’s performance increase, Ewen Callaway compared her G. X0 B! m+ }0 M2 z P) r
Olympic 400-metre IM time with her performance at the World Championships in
1 I- u; r5 ~8 f& ?* n2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “3 e, j: d' q i3 F' l; ]9 B7 A
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous& [) M# D7 o9 r% A
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
, e) e1 d, @) Qimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
9 s, W5 _- t0 b1 q: Xdifference between the gold and silver medal, I see no reason for 5.38 s to% l5 l z, ]$ \3 s$ H
be treated as 7 s.( d! y: S3 P1 \- p
0 }" f' c( Y7 p" Q: l, Y3 ]Second, as previously pointed out, Ye is only 16 years old and her body is
2 r) w1 t4 [) B/ o: h9 astill developing. Bettering oneself by 5 seconds over two years may seem
+ m: W5 h- p2 e# h% C8 t6 Z# qimpossible for an adult swimmer, but it certainly happens among youngsters.% |& \( t; P9 m0 C& i
An interview with Australian gold medallist Ian Thorpe revealed that his 400& v* `; D6 }. }) d; A* X1 `* G
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
9 _/ K8 v$ O/ ?. R4 h$ K OFor regular people, including Callaway, it may be hard to imagine what an
2 N0 M! }) \% Welite swimmer can achieve as he or she matures and undergoes scientific and
/ _1 c+ H# y9 l3 V, n% H( Gpersistent training. But jumping to the conclusion that it is “anomalous”4 l: m* u9 G/ {6 G4 v- ~' m4 K
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) W- m" s9 \' C0 b
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
% E& h* @6 j% M( L* n1 Jthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so: P3 H( h$ ]' k7 G4 j: \; |
he chose not to push himself too hard and to conserve his energy for later" C6 Y0 N1 c! p$ R; U" |
events (whether this conforms to the Olympic spirit and the ‘use one’s
5 ]% Y2 z. r& L4 Zbest efforts to win a match’ requirement that the Badminton World
* v5 b! a4 F) S, j2 d* mFederation recently invoked to disqualify four badminton pairs is another
T. N# J$ W" Y" U# C4 Etopic worth discussing, though probably not in Nature). Ye, on the other( d+ l& A6 ]2 m4 v1 o, R
hand, was trailing behind after the first 300 metres and relied on freestyle- o1 Q" m9 @7 a- V; N3 W* ^6 Z
, in which she has an edge, to win the race. Failing to mention this
. b, r' s3 P5 C7 nstrategic difference, as well as the fact that Lochte is 23.25 seconds
% K' `3 n" q- }3 u/ q% \faster (4:05.18) than Ye overall, creates the illusion that a woman swam/ U) z* G0 v- `5 T
faster than the best man in the same sport, which sounds impossible. Putting* g+ P2 b. G/ ]! S- c/ s
aside the gender argument, I believe this is still a leading question that
0 m9 J& X4 {& r& r4 cimplies 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; M, A. Z* g0 _. K+ {
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93" L' y. {7 G3 Z
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
8 M( ?6 q t4 Y) X; K6 P), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. ~. ~0 h m9 B* S" {5 rout, if we are just talking about the last 50 metres in a 400-metre IM,
8 M _- h7 D! V% d% Q; ]# Z% p- [Lochter is not the example I would have used if I were the author. What kind8 X$ F! i, t$ ` F
of scientific rigorousness is Callaway trying to demonstrate here? Is it9 V# o5 [) p/ F1 l
logical that if Lochter is the champion, we should assume that he leads in" _& T' w& S. Z6 L# f+ u6 ^: p. g
every split? That would be a terrible way to teach the public how science
% r7 S5 t7 @4 D1 z: Kworks.$ w" y2 N' D2 J3 v" \
% [5 r" [8 q# B1 K0 M2 n6 \3 JFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( `& N8 x* a' h! _2 }% ]1 fimplies that a drug test cannot rule out the possibility of doping. Is this
1 A. z" D. G2 ^9 q" y1 akind of agnosticism what Nature really wants to teach its readers? By that; [; j; M3 l2 P( x4 o2 Y" Q4 Q
standard, I estimate that at least half of the peer-reviewed scientific
- Z. D& q1 w$ N( ipapers in Nature should be retracted. How can one convince the editors and
+ ~9 m+ I' [ D0 Freviewers that their proposed theory works for every possible case? One, Z( a8 `! [$ }6 R" L3 L8 W: o
cannot. One chooses to apply the theory to typical examples and to1 D5 b3 R0 n2 w) T/ `2 c
demonstrate that in (hopefully) all scenarios considered, the theory works
8 w1 Z+ O& P: g7 U+ s6 {: ^' {" }7 Hto a degree, and that that should warrant publication until a counterexample y' t( w3 }2 K3 A! O; i% Q
is found. I could imagine that Callaway has a sceptical mind, which is! Y( S* u6 V, Q# a0 m
crucial to scientific thinking, but that would be put to better use if he7 s; F" S$ R+ @7 \' C O3 p
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
: r9 H/ h( }$ H6 a5 tadvanced, non-detectable drug that the Chinese have come up with in the
% n- N' k7 g; l/ {$ g! k4 q. spast 4 years (they obviously did not have it in Beijing, otherwise why not
- a6 Q9 L, x) H1 s' E' Kuse it and woo the audience at home?), based on data and rational derivation
" X* W* F9 C' G! z$ `7 o( m$ S& q9 N. This article, however, can be interpreted as saying that all athletes are
7 ^* Z+ L3 E2 z* h/ Tdoping and the authorities are just not good enough to catch them. That may2 o4 _# |# e( p7 y
be true, logically, but definitely will not make the case if there is ever a
9 A2 E4 T" v1 e% Y, e) Nhearing by the governing body for water sports, FINA, to determine if Ye( i* { f" ~6 e
has doped. To ask whether it is possible to obtain a false negative in a
" w6 S( S2 n8 [8 x6 n* ldrug test looks like a rigged question to me. Of course it is possible:
4 q& M$ ~& ]7 y8 ` Iother than the athlete taking a drug that the test is not designed to detect4 X7 Y: d; Z5 L* G1 z, ~4 P
, anyone who has taken quantum 101 will tell you that everything is
0 g) w8 V$ |! h- W. a$ j8 |probabilistic in nature, and so there is a probability that the drug in an8 N5 y) {6 z# q6 _/ j, \0 U
athlete’s system could tunnel out right at the moment of the test. A slight
. G. ^) k3 |6 _4 F9 p2 @: Uchance it may be, but should we disregard all test results because of it?0 o( M& S& z% T9 Z; O1 I8 @1 B4 Q
Let’s be practical and reasonable, and accept that the World Anti-Doping
8 A$ w1 ?% Q2 uagency (WADA) is competent at its job. Ye’s urine sample will be stored for# u4 B e4 a% ?1 X8 X* c! {
eight years after the contest for future testing as technology advances.- g! r/ V, g( W
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-+ z) G6 P0 G" ~
competition drug test is already in effect, which Callaway failed to mention
. P9 J6 S% I1 @. As noted in the president of WADA’s press release, drug testing for) A1 }' q$ a% d' q" H- ^
Olympians began at least six months before the opening of the London
9 p5 T/ m7 b- v- P5 P. tOlympics. Furthermore, 107 athletes have been banned from this Olympics for
3 d$ J% L1 @& z+ Q/ Zdoping. That may be the reason that “everyone will pass at the Olympic
- J( n; F2 u9 G' F' |( f4 e# q3 h9 Qgames. Hardly anyone fails in competition testing” — those who did dope; r+ k) {0 L$ c3 H" d( Q7 `" }: B7 U
have already been caught and sanctioned. Callaway is free to suggest that a" G1 `3 E p, B/ m: Y$ n
player could have doped beforehand and fooled the test at the game, but this
- D$ J+ T" H; a! tpossibility is certainly ruled out for Ye.* Q+ h. A$ d( G C
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Over all, even though Callaway did not falsify any data, he did (
/ D1 `5 F- F. K" M Uintentionally or not) cherry-pick data that, in my view, are far too" }$ F# T1 k( }/ J& W% l6 a
suggestive to be fair and unbiased. If you want to cover a story of a$ w: ]$ z, }) x
suspected doping from a scientific point of view, be impartial and provide
# h7 n. }: u- b! s mall the facts for the reader to judge. You are entitled to your( h' F6 u: @+ v! \+ S
interpretation of the facts, and the expression thereof in your piece,% A0 l. w7 \; C( z0 Z" r) c9 w
explicitly or otherwise, but showing only evidence that favours your$ O. Q R1 C' _8 h
argument is hardly good science or journalism. Such an article in a journal
6 z/ p' W3 g2 N; M8 t. osuch as Nature is not an appropriate example of how scientific research or
3 I9 L' p0 c; G6 areporting should be done. |
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