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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% ]6 Z1 c, z* S
如果是中国长大的,英语能到这种程度真是很不简单。0 T7 [3 x' W) Z3 F
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html/ ]3 I) \1 [" }7 ~$ f, g; `) N/ ?
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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* V; ~# \ D8 |It is a shame to see Nature — which nearly all scientists, including myself$ I0 H% C1 d0 M- k6 T
, regard as one of the most prestigious and influential physical-science3 E5 ^+ C# |8 ?. ]. d
magazines — publish a thinly veiled biased article like this. Granted, this* ]! f+ A6 U4 X
is not a peer-reviewed scientific article and did not go through the8 a8 m$ c2 Z9 z9 k B" H$ [
scrutiny of picking referees. But to serve as a channel for the general( \4 {* `7 S8 n9 {! z6 }3 B
populace to be in touch with and appreciate science, the authors and editors
0 c* `. S% w7 ~; W" y3 D8 {" Q9 Ushould at least present the readers with facts within the proper context,+ @8 b: [* |8 m' s
which they blatantly failed to do.
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0 F0 r G* ] D9 ?# y% SFirst, to identify Ye’s performance increase, Ewen Callaway compared her
' }& D h: u$ r. ^Olympic 400-metre IM time with her performance at the World Championships in2 o X; g- y- K7 K$ j
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
, {. t; s2 H6 b! v. F; `anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- ~! {) h, u' L$ h- I* g, J ppersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
1 r5 {( M5 W) l' Pimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the. Y. O C; u. H! l* m& V
difference between the gold and silver medal, I see no reason for 5.38 s to; T" M7 H+ b7 O, Q
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is3 j; a# B: A. K1 L4 v
still developing. Bettering oneself by 5 seconds over two years may seem3 g8 ]) z8 ~3 q/ {( ]. E' E
impossible for an adult swimmer, but it certainly happens among youngsters.
. R- K8 N {! U3 z6 L0 O* gAn interview with Australian gold medallist Ian Thorpe revealed that his 400# b$ _7 b1 r, @7 r9 l3 A" ~& m+ v
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
# S$ y' W; l. t1 L1 m6 y5 {& cFor regular people, including Callaway, it may be hard to imagine what an' f9 u1 k) C I! N8 ^
elite swimmer can achieve as he or she matures and undergoes scientific and
+ ?& L( c# x- ~& rpersistent training. But jumping to the conclusion that it is “anomalous”8 r4 W" N) G ?' l7 t* |
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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$ E j# m5 _" V. x QThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
: V5 \1 g7 Z' k" V+ r9 F) }example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
A+ m- M' }7 P. X- d( E% Bthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
0 \& V4 L6 p8 p% I7 r# ?8 hhe chose not to push himself too hard and to conserve his energy for later; @- v0 q8 M+ h" T$ ?
events (whether this conforms to the Olympic spirit and the ‘use one’s
1 M( G0 ^: P6 d" v2 Abest efforts to win a match’ requirement that the Badminton World! z! a8 N: O# S% b
Federation recently invoked to disqualify four badminton pairs is another
- n6 Z0 N7 ?: H& L; ]: btopic worth discussing, though probably not in Nature). Ye, on the other
$ r5 u0 M0 f- lhand, was trailing behind after the first 300 metres and relied on freestyle
" T$ R# F6 n) `, in which she has an edge, to win the race. Failing to mention this# F3 C1 b) Y5 O3 o% Q4 \7 Y
strategic difference, as well as the fact that Lochte is 23.25 seconds
4 _; W8 g; ?' i) n& ] h7 ]faster (4:05.18) than Ye overall, creates the illusion that a woman swam
0 f% Z* L: F0 j7 Tfaster than the best man in the same sport, which sounds impossible. Putting
% P1 Z7 V% t, O. ^aside the gender argument, I believe this is still a leading question that
6 c0 z7 m! }/ t$ N: r7 `& B! R Zimplies 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
0 Z1 V9 b4 W2 I# Kfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
9 Y% X; \. J K. Y4 C7 _6 A7 h# Ys) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s* u" _1 k8 w4 C* y3 w
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
3 R( O- W/ V2 A" j) Kout, if we are just talking about the last 50 metres in a 400-metre IM,. b6 z4 Q# Z$ G. d) M& i( Y
Lochter is not the example I would have used if I were the author. What kind
3 v, Z5 r3 |3 eof scientific rigorousness is Callaway trying to demonstrate here? Is it
$ w3 Q6 @/ A) `7 E4 slogical that if Lochter is the champion, we should assume that he leads in) c$ K7 D' C- I4 Q, _: q! l
every split? That would be a terrible way to teach the public how science
( G9 J8 v+ Z) Yworks.
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U0 I# A+ N3 _1 k7 _6 I# j$ RFifth is the issue I oppose the most. Callaway quotes Ross Tucker and! J! O# Z) ^& o* k" Q! ^ M; _
implies that a drug test cannot rule out the possibility of doping. Is this! t8 o( A' P) X- M
kind of agnosticism what Nature really wants to teach its readers? By that
" ?% d3 \7 F6 Vstandard, I estimate that at least half of the peer-reviewed scientific: U+ h8 R* F( l3 o! d* K% I' S
papers in Nature should be retracted. How can one convince the editors and% c+ ~ T+ y0 S1 h# q
reviewers that their proposed theory works for every possible case? One
5 |1 h5 ^6 P5 ]/ gcannot. One chooses to apply the theory to typical examples and to; o h- @4 Q" C. v: ]' J
demonstrate that in (hopefully) all scenarios considered, the theory works0 m* N$ k& o7 Q+ o: n+ J4 a w5 W
to a degree, and that that should warrant publication until a counterexample, ~$ A B6 [5 w3 G
is found. I could imagine that Callaway has a sceptical mind, which is8 p& U( Y; y) {, _+ ?
crucial to scientific thinking, but that would be put to better use if he7 S' Z! ^0 R! [2 w% _* t g5 W
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
% L* R3 r, C! {+ X8 C) N& Padvanced, non-detectable drug that the Chinese have come up with in the0 y0 ?7 m7 K/ w/ y! ]
past 4 years (they obviously did not have it in Beijing, otherwise why not
2 v; j! ]2 r# P, W4 t& ~; Luse it and woo the audience at home?), based on data and rational derivation+ g3 [/ Q4 a/ ^& a& A
. This article, however, can be interpreted as saying that all athletes are
" _$ s9 F9 H8 j% f. \doping and the authorities are just not good enough to catch them. That may3 T9 ~5 P6 S/ c+ R
be true, logically, but definitely will not make the case if there is ever a
3 t4 p, Z9 a" h" G% w% p+ Ihearing by the governing body for water sports, FINA, to determine if Ye7 W% a4 u8 Q% W( T( }, V# t( t
has doped. To ask whether it is possible to obtain a false negative in a9 Y% N1 [; M j, I4 j3 I
drug test looks like a rigged question to me. Of course it is possible:
6 G5 F; p) y/ Y8 D1 [3 eother than the athlete taking a drug that the test is not designed to detect
; Y, P2 J) o2 s5 g1 I$ `- g7 h, anyone who has taken quantum 101 will tell you that everything is
) `8 w- a7 d( A6 ?/ f: ^5 n u$ L6 B0 `probabilistic in nature, and so there is a probability that the drug in an
( s# z$ o/ G% X3 ]: b+ l. Uathlete’s system could tunnel out right at the moment of the test. A slight
- C( ~8 O6 p0 L+ Ichance it may be, but should we disregard all test results because of it?6 |5 c8 R: G; e/ f {. X
Let’s be practical and reasonable, and accept that the World Anti-Doping0 Q4 r- O- I; D" l
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
3 `# u. W1 ^3 veight years after the contest for future testing as technology advances.6 W6 J* a2 {7 k, \- I8 D5 a# m+ Q
Innocent until proven guilty, shouldn’t it be?& c+ @5 W3 i/ I0 d
$ R% B3 [/ F# Z3 x9 `7 m8 OSixth, and the last point I would like to make, is that the out-of-
: b8 |& D y% icompetition drug test is already in effect, which Callaway failed to mention
# b( R6 w7 v; Z. As noted in the president of WADA’s press release, drug testing for
3 I) O! p8 C0 }* {7 S( {1 Y2 G7 nOlympians began at least six months before the opening of the London
% C6 b! J3 r9 p& y/ W! @3 L" dOlympics. Furthermore, 107 athletes have been banned from this Olympics for+ T y' P5 B2 V
doping. That may be the reason that “everyone will pass at the Olympic; Q7 _- \& w. n, F
games. Hardly anyone fails in competition testing” — those who did dope
/ O1 `: @3 R5 x9 hhave already been caught and sanctioned. Callaway is free to suggest that a
% f- [- R2 T0 dplayer could have doped beforehand and fooled the test at the game, but this6 m8 u& ?% p d$ v- t! C9 T: b
possibility is certainly ruled out for Ye.1 N, o8 e$ ?& ^" v3 W5 a0 {
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Over all, even though Callaway did not falsify any data, he did (% V# q' R W! Z* B3 [
intentionally or not) cherry-pick data that, in my view, are far too
8 }. [4 P8 ^9 f& B; \- d1 Osuggestive to be fair and unbiased. If you want to cover a story of a
: q( t& O/ _( ususpected doping from a scientific point of view, be impartial and provide( m" u) Q( q. W0 M7 k Y' ]
all the facts for the reader to judge. You are entitled to your
( z4 ]9 m. l/ w+ I; ginterpretation of the facts, and the expression thereof in your piece,
: z1 j* U, v( B/ @explicitly or otherwise, but showing only evidence that favours your
( x+ |6 B$ Y: |( m {) Iargument is hardly good science or journalism. Such an article in a journal# f# Q f0 F" i/ x. p4 ?
such as Nature is not an appropriate example of how scientific research or
; U- a: b# u! k+ _- u4 Creporting should be done. |
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