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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# R" f9 W% F& y9 F# ^- |
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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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3 M# I: N# W) u# T! \FROM LAI JIANG, Department of Chemistry, University of Pennsylvania& w* ^' H0 e; B( S& `
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It is a shame to see Nature — which nearly all scientists, including myself
6 V g$ w- q3 f' V; n' r, regard as one of the most prestigious and influential physical-science) R/ ?+ D+ o1 _3 ?3 G! p
magazines — publish a thinly veiled biased article like this. Granted, this! d4 f6 m$ O) ^1 u3 [5 g& F2 _
is not a peer-reviewed scientific article and did not go through the
* H# V9 E$ t4 P7 \7 wscrutiny of picking referees. But to serve as a channel for the general% T9 i, @% I7 Y! e2 j+ L' d y
populace to be in touch with and appreciate science, the authors and editors
' X+ X: W0 C* A2 t7 Q w$ zshould at least present the readers with facts within the proper context,9 |& U* N, H- S7 G; d
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
# [# A# A! w( }Olympic 400-metre IM time with her performance at the World Championships in) T' U9 s9 u/ O) Q! m
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
; N1 f: [+ Z! h. A4 J) P6 W/ manomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
1 q8 E, d5 Y/ }2 G2 Apersonal best was 4:33.79 at the Asian Games in 2010. This leads to an* \" u' R7 D1 D! e
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
. Z) T. n1 l( T9 O$ D/ qdifference between the gold and silver medal, I see no reason for 5.38 s to8 g" `$ p# r9 i) @
be treated as 7 s.
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% Z5 y& v: O0 |: }& G! {6 nSecond, as previously pointed out, Ye is only 16 years old and her body is: \& G- Q; l2 l9 v" K
still developing. Bettering oneself by 5 seconds over two years may seem) u! W e, D+ Y, g& M7 G9 i# g
impossible for an adult swimmer, but it certainly happens among youngsters.; t; S' |: Z- f7 i1 K
An interview with Australian gold medallist Ian Thorpe revealed that his 400
' T, |3 O2 S- B' m1 v; ^8 v-metre freestyle time improved by 5 seconds between the ages of 15 and 16.( J; b3 p+ R8 T6 o& ~0 O2 o* O
For regular people, including Callaway, it may be hard to imagine what an, C3 `* Q/ T$ L$ A
elite swimmer can achieve as he or she matures and undergoes scientific and
8 ]7 V1 A2 F( v ? Wpersistent training. But jumping to the conclusion that it is “anomalous”
& {# ^3 R& U1 C( Mbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.9 c3 \" A. |5 C* ^
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook, q' E1 X, X6 q! ]
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in. T+ P5 {5 B: q/ u2 `2 v
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so7 e, Z# u4 T7 k0 r" P
he chose not to push himself too hard and to conserve his energy for later
_; D) d7 r1 @% F: uevents (whether this conforms to the Olympic spirit and the ‘use one’s
& g/ l9 K6 R/ h7 D3 @best efforts to win a match’ requirement that the Badminton World
* `% Z7 m8 [0 C" i0 o+ ~Federation recently invoked to disqualify four badminton pairs is another0 N- q% I+ F ?2 ^: z: `0 C
topic worth discussing, though probably not in Nature). Ye, on the other% c( C. @. D! `4 D* p& J; n) W
hand, was trailing behind after the first 300 metres and relied on freestyle! ]" d# ~) v* }+ \: \* o* V# A, E
, in which she has an edge, to win the race. Failing to mention this4 _9 E% {! x6 v- | _" Y, ?
strategic difference, as well as the fact that Lochte is 23.25 seconds
5 \9 q6 Y, p0 V# mfaster (4:05.18) than Ye overall, creates the illusion that a woman swam. E! q( m7 Y+ Y% A
faster than the best man in the same sport, which sounds impossible. Putting7 @, \2 R; E5 B9 T% g
aside the gender argument, I believe this is still a leading question that$ K! I+ x5 |- z) v6 R* e
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
2 T5 j! \2 N1 t# l0 I5 pfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
5 H& i5 Z' ?7 i% a0 f, V5 bs) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
6 z, C* Q. o4 y$ C+ c3 d" p), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
0 m" t: [* h3 k4 Y, `out, if we are just talking about the last 50 metres in a 400-metre IM,4 h; r$ l/ z+ j' A& J, S1 [
Lochter is not the example I would have used if I were the author. What kind
7 x6 w' T" u& B: Z1 G) wof scientific rigorousness is Callaway trying to demonstrate here? Is it1 d3 K6 ^( }# _2 s$ k/ f
logical that if Lochter is the champion, we should assume that he leads in
3 I- q' `6 U% G* J1 ]' Y( S1 r( U5 `every split? That would be a terrible way to teach the public how science! A" r7 [9 g: I( {$ H
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and1 X$ X- ~5 e0 T0 ]' Q, h4 p
implies that a drug test cannot rule out the possibility of doping. Is this
7 s3 O9 x! R1 V+ G" u, a: N$ W- Q0 |kind of agnosticism what Nature really wants to teach its readers? By that2 r! p7 C& C+ N3 O8 l8 L+ v! i: c+ D
standard, I estimate that at least half of the peer-reviewed scientific
8 [3 _3 E3 l1 F9 g' K tpapers in Nature should be retracted. How can one convince the editors and% ^, U0 l5 h$ x8 C% ?6 {( {
reviewers that their proposed theory works for every possible case? One: j# b' b y3 ]' ^
cannot. One chooses to apply the theory to typical examples and to- c/ ^, C4 F5 P1 q/ M/ `1 |
demonstrate that in (hopefully) all scenarios considered, the theory works
; F8 o8 G1 k) I; X+ Cto a degree, and that that should warrant publication until a counterexample
t, {/ z9 g6 M$ S% ais found. I could imagine that Callaway has a sceptical mind, which is
, V" a* b' C6 b7 W5 A. k% [crucial to scientific thinking, but that would be put to better use if he
$ }; v" r- X1 q+ H1 T& T# Jwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
# w/ w! P: v# e# [, _advanced, non-detectable drug that the Chinese have come up with in the% S- K- [ _+ f8 w' f( P
past 4 years (they obviously did not have it in Beijing, otherwise why not- H+ Y' D3 R7 R' Y, v/ r7 e ^
use it and woo the audience at home?), based on data and rational derivation8 }5 H- B, Q0 y a' v1 G
. This article, however, can be interpreted as saying that all athletes are8 L1 A$ r0 m% P
doping and the authorities are just not good enough to catch them. That may
, p5 f3 y! H0 U% c3 fbe true, logically, but definitely will not make the case if there is ever a
' Q- {# F& W0 H/ c& r+ S, h- Yhearing by the governing body for water sports, FINA, to determine if Ye3 |5 U* `1 D& D0 z: p
has doped. To ask whether it is possible to obtain a false negative in a
( T. e$ M5 r, f" o8 k3 e/ i; }drug test looks like a rigged question to me. Of course it is possible:& n+ v _8 l& Q2 h" V+ a5 T. `
other than the athlete taking a drug that the test is not designed to detect
2 e+ L2 Z' L' r7 O+ Q8 [! B, L0 H, anyone who has taken quantum 101 will tell you that everything is
/ p+ \7 |; l2 u4 K2 o; H; Z7 zprobabilistic in nature, and so there is a probability that the drug in an3 `6 z2 \& E8 y8 ?1 q
athlete’s system could tunnel out right at the moment of the test. A slight
: R$ Q- N2 d2 k/ j% h Uchance it may be, but should we disregard all test results because of it?. `9 V. n+ E$ k, D4 y; e
Let’s be practical and reasonable, and accept that the World Anti-Doping
1 L1 K. ~1 C, {' Pagency (WADA) is competent at its job. Ye’s urine sample will be stored for* s2 j' w7 G' _
eight years after the contest for future testing as technology advances. \$ N7 z; Q7 _" L: e
Innocent until proven guilty, shouldn’t it be?3 Y1 O Q2 V: O( w
' C+ j/ \7 d" R$ U% D3 @6 xSixth, and the last point I would like to make, is that the out-of-- F1 @: B% c3 o" [6 @ p4 n7 x
competition drug test is already in effect, which Callaway failed to mention
3 o; l) E; @3 |0 q/ N$ }. As noted in the president of WADA’s press release, drug testing for
; Q) e4 L/ x* U+ zOlympians began at least six months before the opening of the London
* V" p" S! K5 K8 k/ B# d& B8 sOlympics. Furthermore, 107 athletes have been banned from this Olympics for3 ]) A! K# u6 }' h8 Z0 H
doping. That may be the reason that “everyone will pass at the Olympic
) x& B; i8 N/ \. J; U+ fgames. Hardly anyone fails in competition testing” — those who did dope
0 Q" m. |# P; [( n3 x9 o' G" zhave already been caught and sanctioned. Callaway is free to suggest that a
1 k! s; \/ L h& W% k" fplayer could have doped beforehand and fooled the test at the game, but this
4 t6 z* p: m/ vpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (1 ]/ s9 w) J2 z; {$ N1 A, ^0 Y# C
intentionally or not) cherry-pick data that, in my view, are far too6 w& H0 k( ~% _# a/ x0 ]
suggestive to be fair and unbiased. If you want to cover a story of a
8 p6 t' Y# a9 o8 ]suspected doping from a scientific point of view, be impartial and provide+ o% g+ C k1 {$ n- o" A/ _0 E
all the facts for the reader to judge. You are entitled to your
9 J. g3 d9 l) n2 }interpretation of the facts, and the expression thereof in your piece,
! u# L! Q1 b {; ~4 s5 uexplicitly or otherwise, but showing only evidence that favours your) @- x+ j% O; Y% [
argument is hardly good science or journalism. Such an article in a journal
' ?+ k) |& b4 N5 h: c7 zsuch as Nature is not an appropriate example of how scientific research or
( R7 }" g. k7 Nreporting should be done. |
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