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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; f$ X0 e5 P& `8 W
如果是中国长大的,英语能到这种程度真是很不简单。2 q% ?% [5 r5 _! M; n
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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/ V* O4 u/ u7 F' T! zIt is a shame to see Nature — which nearly all scientists, including myself$ u3 P+ i) [7 }3 M
, regard as one of the most prestigious and influential physical-science
# G* {" i. \: w$ O: U* V! W Q4 Rmagazines — publish a thinly veiled biased article like this. Granted, this5 K) l2 P4 t1 p5 T
is not a peer-reviewed scientific article and did not go through the
, K0 v, v" A5 R5 h9 N: \6 Iscrutiny of picking referees. But to serve as a channel for the general# t& s7 D9 I8 N% s
populace to be in touch with and appreciate science, the authors and editors; b6 y- H4 t" ]6 a2 J
should at least present the readers with facts within the proper context,
4 B* H3 E9 E! I( j- c$ p) U$ Ewhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her) K( {0 o2 G+ f! ^
Olympic 400-metre IM time with her performance at the World Championships in
+ }6 {# g$ F6 `) p- X3 B- z4 L2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “' Q1 A1 a1 i/ n+ G
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
& F6 S" P3 `5 ~$ Opersonal best was 4:33.79 at the Asian Games in 2010. This leads to an0 W8 P6 U3 V9 m
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the" N% c4 W- H. j) G9 l1 J
difference between the gold and silver medal, I see no reason for 5.38 s to' l8 e9 G) [7 _! t) t6 D% J
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is& ]5 Z2 b% p' R( Z* O, F9 r% V
still developing. Bettering oneself by 5 seconds over two years may seem! t3 y! d. @* o$ F# q
impossible for an adult swimmer, but it certainly happens among youngsters.
8 a& }, ^2 y. C" k( i/ gAn interview with Australian gold medallist Ian Thorpe revealed that his 4007 T1 `- L$ T) I* y* @1 L* `
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.1 `% U( F4 H$ l; Z P/ g8 j
For regular people, including Callaway, it may be hard to imagine what an
, r( n8 s, p8 v5 q* R; G/ gelite swimmer can achieve as he or she matures and undergoes scientific and
& {( ~; F5 T' g, Qpersistent training. But jumping to the conclusion that it is “anomalous”) W: `- s! k! K1 o0 K
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.9 J ~1 K' R4 U% g# f4 |
% y& U! U7 F+ t( WThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook% t* k! u) `! w7 t: M- \. t
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
* i! S* f- S& B; _, f# Tthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so5 T. t" L8 L1 H( r4 G
he chose not to push himself too hard and to conserve his energy for later
/ Q7 e* r: D0 ]events (whether this conforms to the Olympic spirit and the ‘use one’s7 E, X/ s1 N m6 ~- |( ? J" |
best efforts to win a match’ requirement that the Badminton World
- W' r. X: W# q& V# {% DFederation recently invoked to disqualify four badminton pairs is another
6 e- T) \2 f7 v. [9 x$ u Ctopic worth discussing, though probably not in Nature). Ye, on the other1 |7 ]& o, E6 `; _, z
hand, was trailing behind after the first 300 metres and relied on freestyle
3 H4 Z% X! |6 u: e$ Q1 j, in which she has an edge, to win the race. Failing to mention this
: r! R* Z& u* U- B- Y& K9 L6 Fstrategic difference, as well as the fact that Lochte is 23.25 seconds! x6 e% r" b# A2 J
faster (4:05.18) than Ye overall, creates the illusion that a woman swam2 D/ {' h- x8 W% B5 I$ b, d
faster than the best man in the same sport, which sounds impossible. Putting0 V5 n8 ^% t5 R/ T8 g( l1 u: O
aside the gender argument, I believe this is still a leading question that0 b+ r& o- C" R1 t
implies to the reader that there is something fishy going on.
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( w; Y$ y- t: z; ~Fourth is another example of cherry-picking. In the same event, there are
# N# U) A6 }) J8 Y5 Ffour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) [9 {# t/ N6 |. y; w" T
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
0 j7 n. N. d4 J( }) }7 y), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns& g: q- R$ _1 V2 Q3 y9 k
out, if we are just talking about the last 50 metres in a 400-metre IM,
s, j5 m4 d( G3 l9 A. y2 wLochter is not the example I would have used if I were the author. What kind
# B1 g& V: E" W; P9 r5 O- G' gof scientific rigorousness is Callaway trying to demonstrate here? Is it
9 S9 J% B" J2 \7 c5 _) ^logical that if Lochter is the champion, we should assume that he leads in
. q' B! i% A' N5 nevery split? That would be a terrible way to teach the public how science" D6 S- V0 C1 \. o, J
works.5 j. F3 _) P8 I, o/ P L- `3 E- l: J
( \5 i* c8 }$ C& {$ cFifth is the issue I oppose the most. Callaway quotes Ross Tucker and) j$ c1 q/ R8 y w! h1 \
implies that a drug test cannot rule out the possibility of doping. Is this
0 F2 q) |! _9 `# l: ykind of agnosticism what Nature really wants to teach its readers? By that
+ h! z7 q& M) H/ Ystandard, I estimate that at least half of the peer-reviewed scientific& m, W% q/ ^) ], P
papers in Nature should be retracted. How can one convince the editors and( m& O- N8 ~& I8 h" N
reviewers that their proposed theory works for every possible case? One
E: d# f5 q0 l- r C2 |# c' _8 icannot. One chooses to apply the theory to typical examples and to
% X0 v! l- N( m. c) D, c2 xdemonstrate that in (hopefully) all scenarios considered, the theory works9 i. @8 w: ^2 u8 ~8 I4 P
to a degree, and that that should warrant publication until a counterexample
: D7 b/ W6 k: g0 T$ }: z# s' h, M) j; D! Ris found. I could imagine that Callaway has a sceptical mind, which is9 a7 r% f& o) J& D
crucial to scientific thinking, but that would be put to better use if he5 Q' u9 q \- n7 S# A1 R6 t# c. t+ A
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly; U' m: m. j J) p, R0 P, e; s
advanced, non-detectable drug that the Chinese have come up with in the
& q5 E% Z( z8 I* K- J) }past 4 years (they obviously did not have it in Beijing, otherwise why not4 j% p5 T; X( N4 P6 y) G/ ^
use it and woo the audience at home?), based on data and rational derivation' @" F+ D0 B% Z2 p
. This article, however, can be interpreted as saying that all athletes are6 r0 t3 H! P& X2 J/ y! y
doping and the authorities are just not good enough to catch them. That may
5 q5 ?% G& u; mbe true, logically, but definitely will not make the case if there is ever a; h7 |# g- q# T8 _2 u
hearing by the governing body for water sports, FINA, to determine if Ye
7 N$ ^2 W' A8 Mhas doped. To ask whether it is possible to obtain a false negative in a$ J6 B$ o$ _' h' v
drug test looks like a rigged question to me. Of course it is possible:
: M6 h; `& m( F( Sother than the athlete taking a drug that the test is not designed to detect
5 V* R; w% Q" M/ O, anyone who has taken quantum 101 will tell you that everything is- O* T- n* O& ^8 }9 j9 t
probabilistic in nature, and so there is a probability that the drug in an% c: Z$ w9 v- n# T9 h+ u/ U& y9 k1 J
athlete’s system could tunnel out right at the moment of the test. A slight3 n. I1 ^ N5 F$ q
chance it may be, but should we disregard all test results because of it?; Q) L b7 k2 B7 o2 l
Let’s be practical and reasonable, and accept that the World Anti-Doping! U+ P+ J1 ^! I; t+ B& J" Q
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
( t" d; _) z7 x3 h5 |* {% ~2 |eight years after the contest for future testing as technology advances.9 y( ?1 s) s& a
Innocent until proven guilty, shouldn’t it be?( P2 t& J# ]. D& g1 r F" Y7 H
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Sixth, and the last point I would like to make, is that the out-of- ~4 g5 |6 @) n' [5 ]
competition drug test is already in effect, which Callaway failed to mention1 U9 I4 P2 F, P& r
. As noted in the president of WADA’s press release, drug testing for
( a/ d3 f7 @+ sOlympians began at least six months before the opening of the London$ S# ?/ _4 ? @" f. J
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
. B& H# y) ^4 e/ ^doping. That may be the reason that “everyone will pass at the Olympic F8 p: w4 N* M, A, ?
games. Hardly anyone fails in competition testing” — those who did dope6 ?2 U9 @8 [4 m' X2 Y
have already been caught and sanctioned. Callaway is free to suggest that a
3 P8 q3 P& l7 U# p/ Z( U# M( splayer could have doped beforehand and fooled the test at the game, but this
/ ]$ a: i4 H) m& K6 V! X+ `possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (3 }& T/ ^- U) J8 e5 r! w
intentionally or not) cherry-pick data that, in my view, are far too$ e; V- f' `. x6 C) p
suggestive to be fair and unbiased. If you want to cover a story of a% M$ Z/ F7 z1 Q, [( x; \
suspected doping from a scientific point of view, be impartial and provide
& o2 @ K8 z3 J* _, ~. P# z3 vall the facts for the reader to judge. You are entitled to your+ L* }3 q# k5 V! |& Q2 Z9 W6 b$ s
interpretation of the facts, and the expression thereof in your piece,* N; z+ ~: I9 p
explicitly or otherwise, but showing only evidence that favours your
8 A# ~6 O7 ~( z( Eargument is hardly good science or journalism. Such an article in a journal" M- N w# U2 ?1 n7 j" @* b
such as Nature is not an appropriate example of how scientific research or
( \* y% z- @% i2 F" h5 |& m0 a8 @reporting should be done. |
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