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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 JIANG0 ^+ A/ e1 U! o* K# W! O9 ?
如果是中国长大的,英语能到这种程度真是很不简单。/ C$ K. `/ ]9 ]4 k7 `8 c
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html, ~4 h- G' @6 E' P# r+ v& W0 W
4 I8 G/ b" H& R6 cFROM LAI JIANG, Department of Chemistry, University of Pennsylvania6 ^7 F) O( m( P) {; J/ H# B
! ~$ M/ R* C5 ], |" WIt is a shame to see Nature — which nearly all scientists, including myself
! x! Z& y7 s, ], regard as one of the most prestigious and influential physical-science2 ?# o+ J1 _. x3 s
magazines — publish a thinly veiled biased article like this. Granted, this
8 ^/ u8 k3 w" c$ O8 Z& pis not a peer-reviewed scientific article and did not go through the2 g! d( m2 ~+ y% p6 t U6 g/ O2 K
scrutiny of picking referees. But to serve as a channel for the general. O' o4 y) d1 V
populace to be in touch with and appreciate science, the authors and editors- C2 Q8 }" U9 X# j" ]' C& ?% w
should at least present the readers with facts within the proper context,
9 Z# ]0 }: [; ? Lwhich they blatantly failed to do. p! u3 ]" Y$ z3 I3 ?/ ~
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First, to identify Ye’s performance increase, Ewen Callaway compared her0 @4 I) {5 P4 K
Olympic 400-metre IM time with her performance at the World Championships in* q$ h; T) N7 P
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “2 K! b1 e! Z7 L
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous( p( X& |% s# V- p
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
Z6 L7 G0 X- \- q% Q7 T, ~improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
/ k- F& C6 i. }1 y0 w5 l9 g G) idifference between the gold and silver medal, I see no reason for 5.38 s to
/ m# s3 X6 f1 G; X& ~be treated as 7 s.8 }3 K2 b" f M0 o7 j D* g8 k* A$ n/ o
6 _0 M2 ~3 f* f B w. kSecond, as previously pointed out, Ye is only 16 years old and her body is2 k, [9 i a; i4 i8 }/ H; A1 M
still developing. Bettering oneself by 5 seconds over two years may seem
8 _2 {" f; R3 a1 y4 Ximpossible for an adult swimmer, but it certainly happens among youngsters.
5 O- Y& j6 t! ?; {' H5 _+ ?An interview with Australian gold medallist Ian Thorpe revealed that his 400
# f. r; F; g' y8 ?1 i* ^/ N-metre freestyle time improved by 5 seconds between the ages of 15 and 16.+ \6 e0 _7 X+ |0 }% s
For regular people, including Callaway, it may be hard to imagine what an% H/ A/ S1 {; b8 U) Y1 @9 X
elite swimmer can achieve as he or she matures and undergoes scientific and$ ]1 K, f" g& {7 `+ I$ A4 ]# l
persistent training. But jumping to the conclusion that it is “anomalous”
8 Q. E* `2 X4 Z+ H; x' Sbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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9 E$ f! b! t9 n. xThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook1 Z6 H A9 @9 O, {& b4 S
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
e* L( ^; V1 Q% u# Uthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so! g% @, g, w/ |8 G( s& B
he chose not to push himself too hard and to conserve his energy for later3 ^/ ]4 c6 W1 Y% K9 u% r1 U4 c' b
events (whether this conforms to the Olympic spirit and the ‘use one’s
- i3 K. z# f( I Pbest efforts to win a match’ requirement that the Badminton World ~' k2 T: h; j/ G
Federation recently invoked to disqualify four badminton pairs is another
! Y- c4 K; A8 U* J% S( Q3 G2 Jtopic worth discussing, though probably not in Nature). Ye, on the other& t1 p3 a+ C* H8 P& Y3 }
hand, was trailing behind after the first 300 metres and relied on freestyle
: J9 H" G9 t3 c0 k3 M3 \ D8 c, _, in which she has an edge, to win the race. Failing to mention this$ Q# @* L. p: h4 l0 [6 n
strategic difference, as well as the fact that Lochte is 23.25 seconds
5 D, \9 I/ X" w! O' j3 g) ?& |# C' Mfaster (4:05.18) than Ye overall, creates the illusion that a woman swam" t0 e0 n0 s X5 K! h
faster than the best man in the same sport, which sounds impossible. Putting/ J2 _1 d' P! Z5 r5 k+ q
aside the gender argument, I believe this is still a leading question that6 j) _# _4 ~8 o O4 Z1 _; h
implies to the reader that there is something fishy going on.
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: t" @4 D4 j, v, Z h+ qFourth is another example of cherry-picking. In the same event, there are! i. p$ s! D/ w7 b
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
. P$ J. Z( L f4 D1 S& ts) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
. s3 j7 m. S: {), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns t# n3 I: j. p; o7 X1 Y9 j
out, if we are just talking about the last 50 metres in a 400-metre IM,5 R3 ?) @7 J1 X. N/ s8 _
Lochter is not the example I would have used if I were the author. What kind
' X- w2 f* `% {# M' S% ?( ^of scientific rigorousness is Callaway trying to demonstrate here? Is it
" p$ M7 }3 V7 H! D# C2 S3 F: ^logical that if Lochter is the champion, we should assume that he leads in8 e* X) [" s, T$ v
every split? That would be a terrible way to teach the public how science7 i4 I+ @7 @3 K5 A! w
works.
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; {' o3 J- T$ P7 gFifth is the issue I oppose the most. Callaway quotes Ross Tucker and0 ]0 K3 k/ i. T/ z* I( H5 J; F6 |* l5 M
implies that a drug test cannot rule out the possibility of doping. Is this' I+ a; p6 j0 Y
kind of agnosticism what Nature really wants to teach its readers? By that
5 j. H& r- Z0 M; }4 Rstandard, I estimate that at least half of the peer-reviewed scientific
: ?! ?' d8 B# w& P+ W% g- Vpapers in Nature should be retracted. How can one convince the editors and# t1 H" \/ A# f y# V. A, r3 T9 a* e
reviewers that their proposed theory works for every possible case? One
9 Q; T; h7 r8 H; h, Tcannot. One chooses to apply the theory to typical examples and to
, F% v0 K @0 J( h2 e6 K+ y1 sdemonstrate that in (hopefully) all scenarios considered, the theory works8 @& }" v3 n+ W* P( a4 `& \
to a degree, and that that should warrant publication until a counterexample
" \4 u1 R7 K6 n8 P/ U/ h+ G+ i2 uis found. I could imagine that Callaway has a sceptical mind, which is: t9 I. d6 |+ @9 {$ k1 V
crucial to scientific thinking, but that would be put to better use if he
4 t" W$ W& J$ W* N" Ywrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
8 |! g9 P1 @* q0 q& ladvanced, non-detectable drug that the Chinese have come up with in the* K- V0 @% X& R
past 4 years (they obviously did not have it in Beijing, otherwise why not
: F, [2 G. Z4 v) @: H: x! e! Muse it and woo the audience at home?), based on data and rational derivation2 R- Q) U W9 J0 e5 Y2 D4 V& n
. This article, however, can be interpreted as saying that all athletes are
- X v+ R% `, f( p/ Mdoping and the authorities are just not good enough to catch them. That may& U0 y- }- [3 E4 ?! Z: r7 o
be true, logically, but definitely will not make the case if there is ever a6 ^6 b1 T* u- ^3 G8 D
hearing by the governing body for water sports, FINA, to determine if Ye# o9 q) x4 G/ Y& B
has doped. To ask whether it is possible to obtain a false negative in a
: C& C9 v7 m+ X c3 C* ?drug test looks like a rigged question to me. Of course it is possible:
: h' v8 j+ @# W) U0 qother than the athlete taking a drug that the test is not designed to detect
1 O6 O. K5 `& g/ ^: |0 P9 W- B! S, anyone who has taken quantum 101 will tell you that everything is
, I) m9 r' K( iprobabilistic in nature, and so there is a probability that the drug in an8 k4 s/ |$ _! p' T* F+ L
athlete’s system could tunnel out right at the moment of the test. A slight
6 L5 \7 {9 i8 k5 d8 L# dchance it may be, but should we disregard all test results because of it?
O7 U. C' A) U D( H+ gLet’s be practical and reasonable, and accept that the World Anti-Doping
+ Z4 p3 L0 N; I' m/ Hagency (WADA) is competent at its job. Ye’s urine sample will be stored for
! G! e# V; q V* D1 e" Deight years after the contest for future testing as technology advances.
- \) }/ a& ?) \) X+ V; [) q. vInnocent until proven guilty, shouldn’t it be?
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- ?+ A, x& ]" N$ t$ {0 h# m+ JSixth, and the last point I would like to make, is that the out-of-
1 M( g; P! T" Zcompetition drug test is already in effect, which Callaway failed to mention2 ~2 |1 e4 M5 W. A. d4 @/ u9 }7 j" R
. As noted in the president of WADA’s press release, drug testing for
1 p+ e3 w- U2 Z+ R+ I. C6 COlympians began at least six months before the opening of the London8 v4 g/ ~$ ]) F* P- @) `: ~$ g
Olympics. Furthermore, 107 athletes have been banned from this Olympics for$ L( t3 x Y) ^! r( c
doping. That may be the reason that “everyone will pass at the Olympic0 O7 ]8 w) T5 x; m2 B e5 y
games. Hardly anyone fails in competition testing” — those who did dope
$ M- h& c% N. z7 Chave already been caught and sanctioned. Callaway is free to suggest that a
) L0 y9 f$ ?. r0 U) I: Oplayer could have doped beforehand and fooled the test at the game, but this
5 v4 W" T) ?7 a% ~! ^: P5 r' kpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (5 B9 L% {7 H1 b0 L4 v/ i: l
intentionally or not) cherry-pick data that, in my view, are far too
w& Y* z3 J1 g7 {# z3 a7 U2 Ysuggestive to be fair and unbiased. If you want to cover a story of a
( W* m5 A, y3 P) m& |suspected doping from a scientific point of view, be impartial and provide
7 O1 A5 h a% L' \3 mall the facts for the reader to judge. You are entitled to your
- u2 O# H$ f9 j0 F$ y& L Y5 `interpretation of the facts, and the expression thereof in your piece,* {( s7 V' v6 e
explicitly or otherwise, but showing only evidence that favours your$ O, o! X9 F' a' E+ u, C
argument is hardly good science or journalism. Such an article in a journal5 n% B! _ D! {) i+ ?
such as Nature is not an appropriate example of how scientific research or0 [6 z: v& R1 [4 p
reporting should be done. |
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