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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$ f0 B J9 I+ U; ^. I
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/ Q) i8 M3 k( u& @4 [* m+ S
" U r9 q6 Y' F) RFROM LAI JIANG, Department of Chemistry, University of Pennsylvania v3 {4 ~0 N. Z! G+ ]# W8 _; Q
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It is a shame to see Nature — which nearly all scientists, including myself8 z# n) K" V) W! Y1 J; r9 X, h
, regard as one of the most prestigious and influential physical-science
) A1 H% z. w* `2 L$ r, B4 ] lmagazines — publish a thinly veiled biased article like this. Granted, this t% A6 p ]( @# \" f t
is not a peer-reviewed scientific article and did not go through the9 K& A, J; z; J8 Q {6 y! q
scrutiny of picking referees. But to serve as a channel for the general4 P& j7 o1 k4 A$ ~1 F
populace to be in touch with and appreciate science, the authors and editors
) n! B( m8 U- d& N( {8 b" Vshould at least present the readers with facts within the proper context, }5 U3 z7 H( B
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her3 t8 j: h$ n, N
Olympic 400-metre IM time with her performance at the World Championships in% W' d* u5 u: o0 I7 X; b% c
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
- o8 q8 s4 W' B) U: oanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
- q8 ~( e0 b' e0 @1 y" ypersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
9 m* n* N0 i) w/ qimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the; l4 V& u; M. [' A4 I2 ]# l$ _
difference between the gold and silver medal, I see no reason for 5.38 s to
$ q0 \! X6 Q' N( y0 R+ e% ibe treated as 7 s.9 ~. S$ ]% R- R
4 X' S6 C. u& ~; @Second, as previously pointed out, Ye is only 16 years old and her body is
) ]( m: l" G, f3 e7 e! m: q' h Ustill developing. Bettering oneself by 5 seconds over two years may seem
; h2 L: l$ ~5 ~- V/ k7 z5 eimpossible for an adult swimmer, but it certainly happens among youngsters.
! i" _ @- x# ], r% sAn interview with Australian gold medallist Ian Thorpe revealed that his 400) G0 t. R. z ?7 a: m! m5 F7 u
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
u0 g$ B! [& k! [+ |' j9 A4 b/ @For regular people, including Callaway, it may be hard to imagine what an! p- a5 T1 t: j& ?# e
elite swimmer can achieve as he or she matures and undergoes scientific and2 [2 ]4 a* `4 x3 A% ?
persistent training. But jumping to the conclusion that it is “anomalous”
5 ]3 J( y" V* Jbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.' p6 r. ], u% d( H* ], O# ^
- R) @/ N& D( L& ?2 ~% H0 w
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
0 H# Z+ Q0 P# T! M5 Y5 _# rexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in- _+ I( K* j$ `% ?& m& a
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
0 _3 G- N8 E9 q3 T, |2 S" vhe chose not to push himself too hard and to conserve his energy for later: ?8 d: o! k4 K* @0 H/ X5 k
events (whether this conforms to the Olympic spirit and the ‘use one’s
# L a# d W+ i2 ]$ Bbest efforts to win a match’ requirement that the Badminton World
9 W/ b& u, P. }8 s( p2 ^Federation recently invoked to disqualify four badminton pairs is another5 E0 _' d5 c. P- k D; q
topic worth discussing, though probably not in Nature). Ye, on the other
W3 C4 Z y3 n- x9 F8 R! lhand, was trailing behind after the first 300 metres and relied on freestyle0 Z8 ^2 c& N1 Q% E5 `
, in which she has an edge, to win the race. Failing to mention this- ^% M) B1 L3 }+ ^# U. k
strategic difference, as well as the fact that Lochte is 23.25 seconds# O0 i0 J6 M# |1 x
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
5 ?* m3 D. X$ l8 @) d3 Hfaster than the best man in the same sport, which sounds impossible. Putting
% _8 e- p5 D; X" ?aside the gender argument, I believe this is still a leading question that) [" l: m1 R7 Y5 [+ M- T
implies to the reader that there is something fishy going on.
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- O v- \: O; N3 E& S7 h4 m+ [) ~Fourth is another example of cherry-picking. In the same event, there are
) I" E7 h/ [; C) @four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.938 {6 Y' Y Q% }) s2 \
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s1 Z% f* Y3 k, T2 s9 z/ R( c
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns; L6 J8 M+ a3 r& o+ y7 t) W! d
out, if we are just talking about the last 50 metres in a 400-metre IM,; z. t" i9 F7 H3 x( [7 Q5 d) X& ^
Lochter is not the example I would have used if I were the author. What kind
( q+ j& {% Y8 o6 G( d( Nof scientific rigorousness is Callaway trying to demonstrate here? Is it* d+ T! G, Q6 Q$ ~9 |' [4 b
logical that if Lochter is the champion, we should assume that he leads in$ C1 z* H' A6 e+ T/ B* p
every split? That would be a terrible way to teach the public how science3 q% c1 w% I/ e6 t) T
works.5 D- `8 C2 C3 L8 o
) o1 B+ x( R/ o- P. p3 Y: YFifth is the issue I oppose the most. Callaway quotes Ross Tucker and& `( d& [" Z- W9 [5 o' \- @; Z9 |
implies that a drug test cannot rule out the possibility of doping. Is this
, ~$ j* |9 a5 [kind of agnosticism what Nature really wants to teach its readers? By that3 y' v' S$ b9 d+ W+ m
standard, I estimate that at least half of the peer-reviewed scientific- w9 N& @& N! z( B2 s9 T( `7 R
papers in Nature should be retracted. How can one convince the editors and
7 {7 r: }/ c+ b7 creviewers that their proposed theory works for every possible case? One
# i5 D ^" |: c3 Bcannot. One chooses to apply the theory to typical examples and to
- l0 {9 O; |* F4 K+ T# T$ D$ R8 Hdemonstrate that in (hopefully) all scenarios considered, the theory works* P- J2 I" N$ L4 V, H7 m
to a degree, and that that should warrant publication until a counterexample
/ B$ L- B8 k3 s. w5 k0 ?( m7 M! O9 |2 iis found. I could imagine that Callaway has a sceptical mind, which is# b' O7 T! H+ C& G
crucial to scientific thinking, but that would be put to better use if he" f0 x1 A1 |1 i# v9 M k
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
, U1 j8 E" l9 O6 ]6 ?( G! d# Fadvanced, non-detectable drug that the Chinese have come up with in the
: `: C2 H# L4 K( mpast 4 years (they obviously did not have it in Beijing, otherwise why not
6 a( v* b2 Z$ V9 q. ]% xuse it and woo the audience at home?), based on data and rational derivation
+ M* `" A# b0 A0 y! K. This article, however, can be interpreted as saying that all athletes are8 _9 p4 v6 H4 }
doping and the authorities are just not good enough to catch them. That may+ D: w' ?& [/ H, ^# Y8 L
be true, logically, but definitely will not make the case if there is ever a
6 T* P3 n7 d5 h! `# nhearing by the governing body for water sports, FINA, to determine if Ye
5 v8 `1 Y2 x" n; {0 n! N8 Ihas doped. To ask whether it is possible to obtain a false negative in a
/ D& m* E4 t7 [) a( j% idrug test looks like a rigged question to me. Of course it is possible:
- u6 E# S3 j1 [9 `; D2 Wother than the athlete taking a drug that the test is not designed to detect
+ y- X% B( D6 R" u, anyone who has taken quantum 101 will tell you that everything is. _0 p: C* Q0 D" E- T
probabilistic in nature, and so there is a probability that the drug in an
- Q3 P7 t' D% i3 nathlete’s system could tunnel out right at the moment of the test. A slight
: \0 o) s7 Z+ V1 K. J, Zchance it may be, but should we disregard all test results because of it?
# l, K+ Q* F$ Z' kLet’s be practical and reasonable, and accept that the World Anti-Doping
: }: n. \8 A& i5 t: ragency (WADA) is competent at its job. Ye’s urine sample will be stored for
6 L' r( I3 u+ ]+ y6 feight years after the contest for future testing as technology advances.
# Y7 R; l5 \( b [" e/ n! G; BInnocent until proven guilty, shouldn’t it be?9 N2 T- o* a) @0 E: O, F }$ w
6 W1 l& _) a. M' a6 w) H. CSixth, and the last point I would like to make, is that the out-of-8 g, m+ g! x! b. W4 k$ a
competition drug test is already in effect, which Callaway failed to mention# d( d+ i. |4 C4 y( J. M1 u
. As noted in the president of WADA’s press release, drug testing for( e( L6 e! Z0 k. O
Olympians began at least six months before the opening of the London9 Q5 ?0 N* d0 j8 U8 S& O
Olympics. Furthermore, 107 athletes have been banned from this Olympics for$ |, Q3 u5 @- x9 J. @5 b! ^$ Y
doping. That may be the reason that “everyone will pass at the Olympic2 O# g" b% \, C$ C5 P2 x9 B( Y5 u
games. Hardly anyone fails in competition testing” — those who did dope5 ]) M9 [8 K8 R+ y8 X; Z4 r% U* s
have already been caught and sanctioned. Callaway is free to suggest that a
/ r2 E, O" V, [; D0 I% Xplayer could have doped beforehand and fooled the test at the game, but this
3 V$ `3 J c# l7 tpossibility is certainly ruled out for Ye.5 }7 T2 K3 ^& F7 a' c9 J
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Over all, even though Callaway did not falsify any data, he did (" o, P+ W m+ w5 [
intentionally or not) cherry-pick data that, in my view, are far too: }8 I# J% l6 \+ Z2 n
suggestive to be fair and unbiased. If you want to cover a story of a# r/ a, O, q8 i: u" |8 t4 h
suspected doping from a scientific point of view, be impartial and provide
9 p# M+ m& I5 a: T. {! M; Y# \' lall the facts for the reader to judge. You are entitled to your
( e) O+ c' g$ Z1 b/ q8 [5 V- @interpretation of the facts, and the expression thereof in your piece,7 q9 y& R) ~2 c9 U3 |3 X, d$ d
explicitly or otherwise, but showing only evidence that favours your( M; z, w( \ L6 X; R4 \
argument is hardly good science or journalism. Such an article in a journal4 t2 Q- F' n$ N# W0 X
such as Nature is not an appropriate example of how scientific research or
O4 R1 A' c- |+ ?# ? \4 Xreporting should be done. |
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