|
 
- 积分
- 455
- 威望
- 455
- 包包
- 463
|
2 i6 |) }/ f4 m! J
作者：科学网 编译 来源：Nature 2012-8-3 11:33:26
5 A0 h# r% I& f# p8 _$ ]+ Z
- [3 Y) a- S7 f* ]8 e6 [- \4 I# J0 I3 0
* o4 P- B8 S& V: Z& F B0 O( o* b" [5 Y& ^8 L$ Z
8月1日，《自然》网站发表文章称，从“科学”的角度来分析，伦敦奥运会中国运动员叶诗文在女子400米混合泳中的表现反常。. }' G# r/ K6 u0 N! k$ f# ]9 q
2 R. Q# \' `7 i6 O! l该文作者Ewen Callaway现为《自然》杂志记者，拥有美国华盛顿大学微生物学硕士学位。" X" O; i5 l+ j4 Q K
+ Y6 I& ]$ T# c9 E文章说，叶诗文打破该项目的世界纪录夺冠引来外界质疑，但大多是从种族和政治的角度，几乎没有从科学角度进行分析。
& |. u, t4 ?: q$ i* m# S, t' D( _2 x/ g( c) N& m; |
文章分析了叶诗文的以往表现记录，指出她的奥运会成绩比7月份同类比赛快7秒；更令人惊讶的是，在400米混合泳的最后50米，她竟比美国男运动员Ryan Lochte还要快。
* t5 B6 ` u3 b+ o0 g/ { E( R( D3 d( K4 {% `
文章此外还指出，兴奋剂检测呈阴性也不能排除运动员服用禁药的可能性。运动员在训练时更有可能服用禁药，因为那时的药物检测不严格。
% ] Q& U. B. l. s" B0 x2 P0 E3 U2 \: c
文章最后建议建立数据库，记录运动员的比赛成绩随年龄和经验增长的变化情况，从而分析他们在比赛中取得更好成绩的可能性。& F0 d+ H5 P% }) e5 i6 I8 m0 u) M
, h$ h) R% p- R, P
此文发表后，在《自然》读者中引起强烈反响。大多数《自然》网友表示，此文荒唐并带有偏见，“如果这篇文章是以事实为基础，那么除非事实本身就是错误的”。（生物谷Bioon.com）4 F5 k6 m9 i9 a& I" S7 x
( j) k& W! K) b ]英文原文：Why great Olympic feats raise suspicions
# u: f4 Y- h* t/ p: V% @0 u4 E! W3 ]/ ]4 a
精彩评论：
: l: @+ Z ^. x2 w0 X
5 Q, U- y3 T X7 o2012-08-02 02:18 AM, h$ t% I6 ~, _" @% D1 _. X: `
+ Y+ C' `2 g. K* M ^7 R
Lai Jiang said:4 P! y: |& W9 s+ ]0 M! j
- f* L. r- j& k" s3 R, f+ v
It is a shame to see Nature, which nearly all scientists, including myself, regard as the one of the most prestigious and influential physical science magazines to publish a thinly-veiled biased article like this. Granted, this is not a peer-reviewed scientific article and did not go through the scrutiny of picking referees. But to serve as a channel for the general populous to be in touch with and appreciate sciences, the authors and editors should at least present the readers with facts within proper context, which they failed to do blatantly. First, to compare a player's performance increase, the author used Ye's 400m IM time and her performance at the World championship 2011, which are 4 :28.43 and 4:35.15 respectively, and reached the conclusion that she has got an "anomalous" increase by ~7 sec (6.72 sec). In fact she's previous personal best was 4:33.79 at Asian Games 20101. This leads to a 5.38 sec increase. In a sport event that 0.1 sec can be the difference between the gold and silver medal, I see no reason that 5.38 sec can be treated as 7 sec. Second, as previously pointed out, Ye is only 16 years old and her body is still developing. Bettering oneself by 5 sec over two years may seem impossible for an adult swimmer, but certainly happens among youngsters. Ian Thorpe's interview revealed that his 400m freestyle time increased 5 sec between the age of 15 and 162. For regular people including the author it may be hard to imagine what an elite swimmer can achieve as he or she matures, combined with scientific and persistent training. But jumping to a conclusion that it is "anomalous" based on "Oh that's so tough I can not imagine it is real" is hardly sound. Third, to compare Ryan Lochte's last 50m to Ye's is a textbook example of what we call to cherry pick your data. Yes, Lochte is slower than Ye in the last 50m, but (as pointed out by Zhenxi) Lochte has a huge lead in the first 300m so that he chose to not push himself too hard to conserve energy for latter events (whether this conforms to the Olympic spirit and the "use one's best efforts to win a match" requirement that the BWF has recently invoked to disqualify four badminton pairs is another topic worth discussing , probably not in Nature, though). On the contrary, Ye is trailing behind after the first 300m and relies on freestyle, which she has an edge, to win the game. Failing to mention this strategic difference, as well as the fact that Lochte is 23.25 sec faster (4:05.18) over all than Ye creates the illusion that a woman swam faster than the best man in the same sport, which sounds impossible. Put aside the gender argument, I believe this is still a leading question that implies the reader that something fishy is going on. Fourth, another example of cherry picking. In the same event there are four male swimmers that swam faster than both Lochter (29.10 sec)3 and Ye ( 28.93 sec)4: Hagino (28.52 sec), Phelps (28.44 sec), Horihata (27.87 sec) and Fraser-Holmes (28.35 sec). As it turns out if we are just talking about the last 50m in a 400m IM, Lochter would not have been the example to use if I were the author. What kind of scientific rigorousness that author is trying to demonstrate here? Is it logical that if Lochter is the champion, we should assume he leads in every split? That would be a terrible way to teach the public how science works. Fifth, which is the one I oppose the most. The author quotes Tucks and implies that a drug test can not rule out the possibility of doping. Is this kind of agnosticism what Nature really wants to educate its readers? By that standard I estimate that at least half of the peer-reviewed scientific papers in Nature should be retracted. How can one convince the editors and reviewers that their proposed theory works for every possible case? One cannot. One chooses to apply the theory to typical examples and demonstrate that in (hopefully) all scenarios considered the theory works to a degree, and that should warrant a publication, until a counterexample is found. I could imagine that the author has a skeptical mind which is critical to scientific thinking, but that would be put into better use if he can write a real peer-reviewed paper that discusses the odds of Ye doping on a highly advanced non-detectable drug that the Chinese has come up within the last 4 years (they obviously did not have it in Beijing, otherwise why not to use it and woo the audience at home?), based on data and rational derivation. This paper, however, can be interpreted as saying that all athletes are doping, and the authorities are just not good enough to catch them. That may be true, logically, but definitely will not make the case if there is ever a hearing by FINA to determine if Ye has doped. To ask the question that if it is possible to false negative in a drug test looks like a rigged question to me. Of course it is, other than the drug that the test is not designed to detect, anyone who has taken Quantum 101 will tell you that everything is probabilistic in nature, and there is a probability for the drug in an athlete's system to tunnel out right at the moment of the test. A slight change as it may be, should we disregard all test results because of it? Let ???’??a |
-
总评分: 威望 + 2
包包 + 5
查看全部评分
|
发表于 2012-8-4 09:29
