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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 JIANG2 p0 _7 `4 ^4 b) `
如果是中国长大的,英语能到这种程度真是很不简单。& }$ s1 k9 G! l. a3 ^- y
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html& @7 T; s! U& R7 }5 j4 f
3 ~: N' E5 }' ]2 E# L2 Z+ VFROM LAI JIANG, Department of Chemistry, University of Pennsylvania5 r9 K. u5 J! i) U1 P N9 I
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It is a shame to see Nature — which nearly all scientists, including myself
' w. w& ]# h( }: }9 X! G/ U, regard as one of the most prestigious and influential physical-science
/ ~- B; @8 g/ S, R8 f) jmagazines — publish a thinly veiled biased article like this. Granted, this1 Y6 y( g+ o; |& d' N: Z
is not a peer-reviewed scientific article and did not go through the
( s1 g7 D4 K5 G* f" Gscrutiny of picking referees. But to serve as a channel for the general3 w3 v- b5 ~' x
populace to be in touch with and appreciate science, the authors and editors
/ @3 O. p! [. x% Zshould at least present the readers with facts within the proper context,
# r7 Q- B4 }" P( b! M7 O. owhich they blatantly failed to do.6 R p3 e& d2 F
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First, to identify Ye’s performance increase, Ewen Callaway compared her, ~2 a; P. Q8 m( V) L& d% d( l
Olympic 400-metre IM time with her performance at the World Championships in
/ I3 j1 C4 a) {9 c( e2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 c" ?" {, a Q. P6 y+ B6 o
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
7 O& Z9 \- z" L$ J; ppersonal best was 4:33.79 at the Asian Games in 2010. This leads to an5 E2 S5 T- \1 N/ A
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
6 A0 r+ Y+ s7 n( J; j% F) M8 s$ E5 Zdifference between the gold and silver medal, I see no reason for 5.38 s to
+ u. u; ~0 [* b' Q+ gbe treated as 7 s.: O" \* i" d4 k ]4 J
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Second, as previously pointed out, Ye is only 16 years old and her body is- D8 M" l! {5 G
still developing. Bettering oneself by 5 seconds over two years may seem
$ m! {" k* x2 n# h4 d) y/ limpossible for an adult swimmer, but it certainly happens among youngsters.
2 J7 Z6 T+ c5 V7 O! [ ]1 xAn interview with Australian gold medallist Ian Thorpe revealed that his 4009 @0 f. m; y* }
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
" c# o6 A2 P* c6 A' n' iFor regular people, including Callaway, it may be hard to imagine what an
0 Q) |7 y2 T+ k6 delite swimmer can achieve as he or she matures and undergoes scientific and& M' u0 }' z) W6 ]- T* S) d
persistent training. But jumping to the conclusion that it is “anomalous”
2 X; o! P; A2 b" u3 E0 w, m4 A5 \based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.# l4 j4 H9 p$ U& Y3 y
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
+ T. u! I2 m; S0 D) ~6 R1 Sexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
: |" O0 `! A: z8 n2 Mthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so9 e0 |3 `; E, C
he chose not to push himself too hard and to conserve his energy for later% {2 t& }5 E& `' Q) U$ @; L
events (whether this conforms to the Olympic spirit and the ‘use one’s; k# `3 _( w1 W* n- H% p: w- Q: ^
best efforts to win a match’ requirement that the Badminton World
5 s4 {" {# K/ w, X! x4 C: Q* x s- ZFederation recently invoked to disqualify four badminton pairs is another ^+ n, y) j" l U4 r: P( x4 a; x& N, F
topic worth discussing, though probably not in Nature). Ye, on the other
% `8 o1 e& t5 Ihand, was trailing behind after the first 300 metres and relied on freestyle
3 j0 c9 T% `' @$ Q% a4 L, in which she has an edge, to win the race. Failing to mention this
% b4 {8 F8 R' I/ U/ H+ Astrategic difference, as well as the fact that Lochte is 23.25 seconds
7 ?0 u, p+ x5 o) j6 ~0 sfaster (4:05.18) than Ye overall, creates the illusion that a woman swam0 @' R) R4 ]9 B. |$ `+ o% ~
faster than the best man in the same sport, which sounds impossible. Putting
+ O1 z" K' V+ V. a1 C4 {aside the gender argument, I believe this is still a leading question that8 ?) b0 } S% R) ], G
implies to the reader that there is something fishy going on.
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& O% S/ u2 X+ [5 j* l J5 dFourth is another example of cherry-picking. In the same event, there are
: f( a8 }* b: r7 t: I7 Vfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.937 Y( }- g' ]2 Y% B4 B
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s7 j! h) f0 w: n4 d+ Z
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns$ y; |* I; h9 p0 H. G
out, if we are just talking about the last 50 metres in a 400-metre IM,* }3 w! f& Y9 B/ X2 b" h
Lochter is not the example I would have used if I were the author. What kind7 _- Z0 I' `8 j& a' g
of scientific rigorousness is Callaway trying to demonstrate here? Is it, e6 h* `+ ` B+ Y" B6 R6 X
logical that if Lochter is the champion, we should assume that he leads in
9 `9 B( {% v4 t9 F$ qevery split? That would be a terrible way to teach the public how science
5 e2 n$ Y3 V$ e4 Pworks.
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4 J/ f( X! p" Z6 R& E6 g' EFifth is the issue I oppose the most. Callaway quotes Ross Tucker and8 z; x0 J( c ?. Z% D
implies that a drug test cannot rule out the possibility of doping. Is this
) Z+ y- G( B5 j6 V9 E# rkind of agnosticism what Nature really wants to teach its readers? By that- `# |& d( [" x1 Y& M" x
standard, I estimate that at least half of the peer-reviewed scientific
1 j( S- K1 v; O: A$ Z* p3 q3 Lpapers in Nature should be retracted. How can one convince the editors and% p+ }0 ?6 B3 s! J* j9 M/ N8 f
reviewers that their proposed theory works for every possible case? One+ e2 Y0 d6 p7 L# _* j; ]" t; Q, C
cannot. One chooses to apply the theory to typical examples and to
$ ?& U _' ]6 I7 kdemonstrate that in (hopefully) all scenarios considered, the theory works1 a$ |. j9 e# k0 m, i* n1 M
to a degree, and that that should warrant publication until a counterexample5 l7 u# n3 ~9 l" ?, a5 }
is found. I could imagine that Callaway has a sceptical mind, which is8 l9 R4 O8 W- K$ `/ o: t
crucial to scientific thinking, but that would be put to better use if he$ S: z* q0 u* A% W7 s
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly+ |. K- J6 @2 Y2 l
advanced, non-detectable drug that the Chinese have come up with in the" L+ t$ l$ a# H/ ^1 K9 p% F
past 4 years (they obviously did not have it in Beijing, otherwise why not
0 ?& B% a' d, z# U$ G( iuse it and woo the audience at home?), based on data and rational derivation* `) r# @+ c# o: V; o; O9 S$ q
. This article, however, can be interpreted as saying that all athletes are
6 `+ W! F# Z5 _ _3 L2 Bdoping and the authorities are just not good enough to catch them. That may
5 U% Y( O( ]8 ?" A' m6 Ibe true, logically, but definitely will not make the case if there is ever a, s0 n3 M( E n7 S1 F8 V' b
hearing by the governing body for water sports, FINA, to determine if Ye H4 G0 p- b5 n; S) M" H
has doped. To ask whether it is possible to obtain a false negative in a
% |& K5 D# ^! f: Q# T+ F6 Ydrug test looks like a rigged question to me. Of course it is possible:
5 b5 C" b. R. y0 ~other than the athlete taking a drug that the test is not designed to detect% j2 O, Z! m2 {- w2 B
, anyone who has taken quantum 101 will tell you that everything is
7 w4 ^, y& B( ?" b( a4 Hprobabilistic in nature, and so there is a probability that the drug in an
+ A# E# X6 v k# Nathlete’s system could tunnel out right at the moment of the test. A slight
3 n& t2 Q0 S# g$ h3 B" zchance it may be, but should we disregard all test results because of it?& P. ]+ o b0 k' v1 v4 h7 J$ K
Let’s be practical and reasonable, and accept that the World Anti-Doping
) }" t# r# b# y2 h7 h- J: Oagency (WADA) is competent at its job. Ye’s urine sample will be stored for
! h; H4 ]" |; p' p2 @/ d) }eight years after the contest for future testing as technology advances.
, }7 c( Z* H8 ?# x* cInnocent until proven guilty, shouldn’t it be?+ a+ x7 Y' F9 o; ~7 j
8 a- ]$ c( c1 t% Q* RSixth, and the last point I would like to make, is that the out-of-1 \; R! r: \$ P
competition drug test is already in effect, which Callaway failed to mention3 ^7 C3 L9 A" s" i+ J+ S
. As noted in the president of WADA’s press release, drug testing for
( W/ f, m6 j1 \3 T/ _) B( _" X# s, fOlympians began at least six months before the opening of the London/ `. E1 G L* j- @+ S% @
Olympics. Furthermore, 107 athletes have been banned from this Olympics for) `# \/ ^: S" d+ d) Y
doping. That may be the reason that “everyone will pass at the Olympic
& q4 t3 S: G; W, p. ^) k4 xgames. Hardly anyone fails in competition testing” — those who did dope
/ B4 [- Y; u# ^2 R$ h- D8 q" u- H. q) ihave already been caught and sanctioned. Callaway is free to suggest that a' x' _. I; ]5 t) U Z3 P: J
player could have doped beforehand and fooled the test at the game, but this
$ F5 x, P A+ H- ] B. |6 ]' apossibility is certainly ruled out for Ye.9 H' E B; p; s, _ y5 N
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Over all, even though Callaway did not falsify any data, he did (2 m! W4 d- d* V# g* c0 ]# u
intentionally or not) cherry-pick data that, in my view, are far too
e" [ k- ?) wsuggestive to be fair and unbiased. If you want to cover a story of a: I) Z1 A- A! _9 C9 P4 I
suspected doping from a scientific point of view, be impartial and provide
* n8 j6 i. t {- d0 R" R* Lall the facts for the reader to judge. You are entitled to your
) r9 n9 |% B" B* Iinterpretation of the facts, and the expression thereof in your piece,
$ S3 s* r( [/ b) d# bexplicitly or otherwise, but showing only evidence that favours your- L6 Q7 O" k" ?/ t6 y& O$ f
argument is hardly good science or journalism. Such an article in a journal
% D$ ^( P0 A7 f4 ]1 p/ [8 Xsuch as Nature is not an appropriate example of how scientific research or
/ Q2 ?- C+ v9 O6 t( `3 G) T; e& l) J% kreporting should be done. |
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