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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. \+ {$ h, C- `- \
如果是中国长大的,英语能到这种程度真是很不简单。, q N% ~& S/ I- x
( z% Y) w+ l1 whttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html; C- ~9 r- _7 I
9 D6 A. c! v. g- N/ ]6 l, IFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
$ M: z$ O3 z3 g7 `6 ~, b% r( G" T, regard as one of the most prestigious and influential physical-science# q4 h; f/ C3 T3 `8 K3 l' k& S& M
magazines — publish a thinly veiled biased article like this. Granted, this
- p" i/ U% I) M; x! }7 K* i4 }* Ris not a peer-reviewed scientific article and did not go through the
& s" R6 C, {' Z# X6 z0 C6 V- R- [scrutiny of picking referees. But to serve as a channel for the general. B$ I8 n( `+ T5 p/ I
populace to be in touch with and appreciate science, the authors and editors3 Q) @8 [7 V. |! P& f# J# U* W3 L2 J
should at least present the readers with facts within the proper context,2 t$ ~' {) f, @+ T1 Z) w
which they blatantly failed to do.( B* H% X! o$ R) n8 e$ O" A2 M
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First, to identify Ye’s performance increase, Ewen Callaway compared her, p. Y# v8 W7 G: o% J
Olympic 400-metre IM time with her performance at the World Championships in4 p6 q( R- Z: X% i' K# w
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “$ g& S- A; q) i' W+ F
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
3 l+ s( }9 G9 `personal best was 4:33.79 at the Asian Games in 2010. This leads to an
2 |, G3 b5 r }* V Q4 Z$ K7 Wimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
# i" ~0 o2 l) B: Ydifference between the gold and silver medal, I see no reason for 5.38 s to
! v2 G0 ~4 p0 l+ f( @+ k: |be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is: M# F2 H( B; _( O$ { k( T
still developing. Bettering oneself by 5 seconds over two years may seem4 }( j8 s! u- f( F- X) \( E
impossible for an adult swimmer, but it certainly happens among youngsters.
3 f. X3 c9 T4 x$ e, |An interview with Australian gold medallist Ian Thorpe revealed that his 4003 l/ j' ], j/ r
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.! k7 C; Q: t# v9 O6 V9 a. y: \- m
For regular people, including Callaway, it may be hard to imagine what an& J: d7 c, c! _+ Z) T
elite swimmer can achieve as he or she matures and undergoes scientific and+ Q5 D2 a1 m( b5 ^4 c3 P
persistent training. But jumping to the conclusion that it is “anomalous”
9 n7 K5 Y: q3 O9 B6 ]% F6 Vbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook! @1 c$ L/ g# O- K7 Q! k/ T
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in/ F* d* P3 Q+ i% s& V
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so# U, K8 P# C5 a2 w
he chose not to push himself too hard and to conserve his energy for later: `9 {" o5 x' L- V, Y' m7 }' T
events (whether this conforms to the Olympic spirit and the ‘use one’s6 W: k" `) q5 v" z) j; D
best efforts to win a match’ requirement that the Badminton World
* [% M* `5 ?9 m7 n1 g+ f* UFederation recently invoked to disqualify four badminton pairs is another
$ N1 `* T7 g) Y) Xtopic worth discussing, though probably not in Nature). Ye, on the other' n2 v+ g0 T& a6 V
hand, was trailing behind after the first 300 metres and relied on freestyle! g4 \! S. ~' T1 x) u$ ?: |
, in which she has an edge, to win the race. Failing to mention this
$ F) w% K3 ~: c( n7 ^3 L' d3 Istrategic difference, as well as the fact that Lochte is 23.25 seconds* J' z( U4 W0 l) M8 j6 M2 \! m+ L! X( d
faster (4:05.18) than Ye overall, creates the illusion that a woman swam6 r. m( o7 T* f
faster than the best man in the same sport, which sounds impossible. Putting0 y0 P: q% D7 @- U( V; Z
aside the gender argument, I believe this is still a leading question that
+ N+ Y b: K5 f* W1 r. wimplies to the reader that there is something fishy going on.( U* D( _5 o8 `* t: u
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Fourth is another example of cherry-picking. In the same event, there are
- L% {# w9 T$ h' ]7 _four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
9 u' s- Z( S+ x! t& ]s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
! ^( H3 N4 b2 M+ U; [/ \5 k7 d9 \), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns% |" ~9 p+ Y. A
out, if we are just talking about the last 50 metres in a 400-metre IM,
- a6 i* e( U6 W. `$ MLochter is not the example I would have used if I were the author. What kind
5 }# c& j& p! Q- jof scientific rigorousness is Callaway trying to demonstrate here? Is it
1 O$ l, W3 `! D W3 s( Clogical that if Lochter is the champion, we should assume that he leads in) m! T: l2 `0 r( H( t# A
every split? That would be a terrible way to teach the public how science9 L2 `4 ?9 S8 w1 ^2 W8 `
works." o( s+ U! P4 ^8 i
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and2 L% f5 S3 U6 J4 }6 K5 T: |
implies that a drug test cannot rule out the possibility of doping. Is this
5 F& @% n8 @! _kind of agnosticism what Nature really wants to teach its readers? By that- W7 h- p- a/ G& X3 y
standard, I estimate that at least half of the peer-reviewed scientific4 J! X# R- t2 }: ~
papers in Nature should be retracted. How can one convince the editors and
, H/ y1 e- v# oreviewers that their proposed theory works for every possible case? One
* C8 b% Z6 }1 O' C6 m6 Bcannot. One chooses to apply the theory to typical examples and to# h& @% N" K, L* V
demonstrate that in (hopefully) all scenarios considered, the theory works- c" B. W& ~* T: w
to a degree, and that that should warrant publication until a counterexample/ @4 `! j2 w$ s T* X* l- n
is found. I could imagine that Callaway has a sceptical mind, which is
4 F6 ]0 A( j$ s, n' O3 `crucial to scientific thinking, but that would be put to better use if he
4 w! R$ z% @. M/ ?/ H: ]9 ?wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly5 G$ U8 ?7 ]8 ~9 a" \5 p
advanced, non-detectable drug that the Chinese have come up with in the" Y1 S; D4 m" \
past 4 years (they obviously did not have it in Beijing, otherwise why not1 \8 x: d, [! S7 k- x# l9 J& m
use it and woo the audience at home?), based on data and rational derivation
+ u9 n- \) b# n+ M- _/ P" e1 M" n. This article, however, can be interpreted as saying that all athletes are
4 X7 x: V# C" Y9 N8 I, odoping and the authorities are just not good enough to catch them. That may+ S! `0 z" x% {2 N
be true, logically, but definitely will not make the case if there is ever a
/ A5 m P: l6 X: l6 P9 Mhearing by the governing body for water sports, FINA, to determine if Ye
: q5 p3 |: c' W! ehas doped. To ask whether it is possible to obtain a false negative in a
8 H7 r# M6 \9 j, _( S: i7 X( Fdrug test looks like a rigged question to me. Of course it is possible:: g7 r- ^8 \3 l: S1 |0 n3 a6 I
other than the athlete taking a drug that the test is not designed to detect
d% J/ `2 I" A7 `! N, anyone who has taken quantum 101 will tell you that everything is J5 y" _5 a q) ^0 U* Q
probabilistic in nature, and so there is a probability that the drug in an
+ A" A% F2 e5 S" Q0 X4 }, @athlete’s system could tunnel out right at the moment of the test. A slight
1 l0 |- z5 X2 H: Z5 kchance it may be, but should we disregard all test results because of it?1 t2 \5 H9 x3 e2 ?# ]/ O2 l+ E* c
Let’s be practical and reasonable, and accept that the World Anti-Doping
+ O3 ]/ M: V, \+ q, e9 }agency (WADA) is competent at its job. Ye’s urine sample will be stored for
8 M+ t8 F% A8 l1 H. A' C: qeight years after the contest for future testing as technology advances.- p1 s& m5 R6 T% l% \
Innocent until proven guilty, shouldn’t it be?- u j" }2 O0 [9 b9 i" L1 S( ?
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Sixth, and the last point I would like to make, is that the out-of-
4 i0 }' i( b" v3 R; e3 K0 `competition drug test is already in effect, which Callaway failed to mention
8 ?" _, }: D5 s# j- P9 C. As noted in the president of WADA’s press release, drug testing for" V4 J$ u; o4 o+ c
Olympians began at least six months before the opening of the London. J% O% G4 K! F, d
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
0 |- d y1 O1 y$ hdoping. That may be the reason that “everyone will pass at the Olympic
7 U4 W# }' a! Vgames. Hardly anyone fails in competition testing” — those who did dope
- O7 M! [3 M# H) o; Phave already been caught and sanctioned. Callaway is free to suggest that a
4 G* s# A4 S3 dplayer could have doped beforehand and fooled the test at the game, but this) a, U/ F. ?4 Z; O0 I3 z
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did ($ b2 s) q& m9 j- A2 J3 s, r$ Q" |
intentionally or not) cherry-pick data that, in my view, are far too2 E$ k; ^' u- W& k8 A5 d) N
suggestive to be fair and unbiased. If you want to cover a story of a+ [( K; {) N' k, g$ o
suspected doping from a scientific point of view, be impartial and provide& x# C+ O+ r/ e
all the facts for the reader to judge. You are entitled to your+ o; j/ O G4 l9 F
interpretation of the facts, and the expression thereof in your piece,
. G: @2 k1 s: \3 Z' _# |explicitly or otherwise, but showing only evidence that favours your( L! X% f& S4 S7 M3 ?
argument is hardly good science or journalism. Such an article in a journal
& @& g5 c' x- V3 G$ I' O8 z; B6 @such as Nature is not an appropriate example of how scientific research or
. j' _0 R T+ w% ^+ P! I8 |reporting should be done. |
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