Positive Bias Could Erode Public Trust In Science
ananyo writes "Evidence is mounting that research is riddled with positive bias. Left unchecked, the problem could erode public trust, argues Dan Sarewitz, a science policy expert, in a comment piece in Nature. The piece cites a number of findings, including a 2005 paper by John Ioannidis that was one of the first to bring the problem to light ('Why Most Published Research Findings Are False'). More recently, researchers at Amgen were able to confirm the results of only six of 53 'landmark studies' in preclinical cancer research (interesting comments on publishing methodology). While the problem has been most evident in biomedical research, Sarewitz argues that systematic error is now prevalent in 'any field that seeks to predict the behavior of complex systems — economics, ecology, environmental science, epidemiology and so on.' 'Nothing will corrode public trust more than a creeping awareness that scientists are unable to live up to the standards that they have set for themselves,' he adds. Do Slashdot readers perceive positive bias to be a problem? And if so, what practical steps can be taken to put things right?"
Right? isn't that what American schools and TV have been teaching for the last 30 years? Nerds aren't cool - facts are open to interpretation - everyone is special - you can eat more than you grow... When you have a society rewarding irrationality, what do you expect? Rigorous science?
I want to delete my account but Slashdot doesn't allow it.
Positive Bias is another word for Group Think. I guess it could also mean deception
There are "studies", and then there is observation, modelling, prediction, model testing which is this thing called science. "Studies" are bullshit. Scientific research functions as it should. I believe the OP's article is just a chunck of sensationalist BS, or utterly ignorant of what science is (and is not).
I received my PhD in physics, and the thesis was measuring a number, in which I measured zero within the error bar. Not particularly interesting, but valid science. My wife was in a PhD program in Biology, she also did valid science, novel measurement technique, came up with an uninteresting result, therefore was not able to publish, therefore was unable to graduate. It would have been extremely simple to fudge the result to a 2-3 sigma result 'hinting' at an interesting answer, which would have gotten published. I think certain sciences have gotten to a point where they have forgotten that if you do valid work in a novel way, then that is science and you should not be punished for the conclusion of the measurement. Most measurements you do of the natural world should probably end up being unsurprising, and thus uninteresting, but you don't graduate or get tenure with those kinds of results. I think this is the mechanism for the positive bias. That is why I do not take results from certain branches of science at face value.
The solution lies in a reformation of research finance that is not focussed on how many papers X published compared to Y, but also takes into account whether they are consequential or not and if they actually comply with at least basic scientific attributes such as repeatibility, verifiablity, falsifiability, accessibility of all data and all conducted research, as well as actually conducted verification of research by independent third parties.
There should also be an outright condemnation of data mining, where data bases are checked only for the existence of attributes and correlations that happen to affirm the researchers opinion and leave all others untouched.
Fields like economics, medicine and climate have long since deteriorated to mere cargo cults due to those failings.
Oh yes, blame it all on fox, the ultimate evil in the universe. It has nothing to do with studies being published making lavish claims which are then later proved false, or so wildly overblown that it's almost embarrassing. Of course, the conduct of the scientists themselves couldn't possibly be at fault and it must all be an even republican conspiracy.
Grow up, pull your head out of your ass, and realize that fox and republicans aren't the only source of evil in the world.
They're overstating precision. Which rather then a forgivable error is an elementary mistake no trained scientist should ever make.
A VERY basic concept they teach at the lowest level of science education is the distinction between accuracy and precision. This is science 101.
Accuracy is whether or not a given conclusion is correct.
Precision is to the degree of specificity.
Typically you run into problems on complex subjects because they overstate the precision of their data or their ability analyze the data.
This can boil down to simple thinks like significant digits.
For example, I'm measuring volume to two significant digits in a giant data set with thousands of measurements. When and if I average those numbers the final average can't have more then two significant digits. That sounds elementary but you see this error made on some big studies. You'll have a situation where something is being measured in a crude sense by many sources and then in the analysis a much higher degree of specificity is implied.
Often that degree of specificity is required to make certain conclusions which is why they break the rule. This is lazy and a breach of scientific ethics. What they need to do is collect the data all over again this time to the level of specificity they need.
Simply saying its too hard to collect the data properly so they're going to make assumptions is not reasonable or ethical. I suppose you could do it so long as you kept an asterisk next to the data and the findings to make it very clear throughout that the conclusion is a guess and not in any way empirical science since at some point people were guesstimating results.
I've decided to stop wasting my time responding to AC trolls/sockpuppets... so if you want a response from me... login.
When you have a hammer, everything looks like a nail.
Anything can become a religion, as a result. We're less critical of our data when that happens, and we "nudge" it into place.
The problem is not "science" per se but our social approach to it.
This is a story about actual bias in scientists which is affecting the quality of their research.
And you completely gloss over that to take issue with Fox, which is no more ore less biased than msnbc, et al...
Look, people seek an echo chamber. "News" companies of all types just supply the demand.
I suppose YOU don't see a problem with some news organizations taking biased scientific output and unquestioningly running with it as though it were the concrete truth for ever more.
THL phish sticks
Science is a method dingbat, anyone who puts faith in a scientist however is practicing demagoguery.
Practice science, not demagoguery.
The trouble is that most such "X causes cancer" statements come from the media themselves, recklessly shortening research results saying "consumption of X correlates with a positive increase in cancer", where the nature of the correlation is unknown and the increase is very small. So it is all to often not an accurate prediction of the research. Particularly, there can often be a chinese whispers effect, where the researcher publishes a paper, the University PR department publishes a precis edited for PR purposes, a popular science journal then reports with its own bias, and it is then taken by mainstream media and truncated again.
A particular example, as often reported b y Ben Goldacre, is the Daily Mail, which seems to summarise everything into causing or curing cancer, and will report the same substance on both sides within days.
Consciousness is an illusion caused by an excess of self consciousness.
angry much?
Damn right scientists are angry. The pervasive anti-intellectualism and well-funded attacks on science to suit political ends are getting ridiculous. Positive bias in peer review is a problem that needs to be addressed, but it is all part of science - studies that cannot be replicated are examined in detail and their models either rejected or refined to be tested again. Just because something is published does not make it "the truth" - it means it is a set of conclusions based on experiments that were done by a particular team of scientists. If it's not repeatable then future publications will say so - that's how the back and forth and refining of models happens. Things don't get held back until the issue is "settled" then get published, it simply doesn't work like that.
Where things start to fall down (and where the anti-science folk with an agenda have such an easy time) is that it can be hard for the layman to sort out what to trust in a scientific publication, since the well-hammered, repeated-by-many-groups stuff is sitting alongside single publications claiming XYZ based on PQR from a single data set in a single research group. It's so easy to wade in there and say "look at this! see! scientists can't agree! it's all a big con to get more money! they'll say anything to further their agenda!".
Again, I'm not dismissing the problems of positive bias - it's a factor of peer review and the way human beings approach the reporting of science, but the job is made much harder by a barely-science-literate blogosphere working full steam to discredit anything they can to make it look like there's some sort of global conspiracy of scientists working against the general public in whatever field the propaganda machines are working against. Climate change is clearly the biggest one at the moment, but it's not restricted to that. There's almost anything related to things that challenge fossil fuels and energy research towards energy independence, then there's anything in the biology field relating to stem cells, vaccinations, pharmaceuticals, etc.
The rise of public opinion that science is somehow something to be regarded with great suspicion and that scientists are actively working against the public good is not only troubling, it's highly counterproductive. It's time we started getting angry about it, it's just almost impossible to fight back - scientists are not equipped to do so against a highly organised and well funded group of individuals who do that sort of character assassination and propaganda for a living.
And ignores the fact that once published, there's no reliable corrective mechanism to propagate those results down beyond a standard literature search. I'm posting as AC because quite a few years ago I published results that I believed at the time to be correct, but were shown to be wrong in a subsequent paper. Despite this, I'm *still* being cited in new papers while the paper that refuted mine is seldom cited. Science isn't some infallible field. We make mistakes; Sometimes those mistakes are accidental, sometimes they're sloppy, and yes, sometimes they're even intentional. That doesn't reduce the validity of science, but it requires us to be more vigilant.
While I agree that models are frequently refined, leading to new results, there is a disturbing trend I see, not having to do with positive bias necessarily, but with uncertainty estimation.
One thing that I've found incredibly hard to beat into undergrads taking my physics lab courses is that getting your uncertainties (or error bars) right is far more important than getting the right central value. This is because uncertainties are the only way that two experiments can be compared against each other, or the only way to compare experiment to theory. If I have two models of climate change, one of which predicts a temperature rise of 3 C ± 5% and another that predicts 4 C ± 7%, those results are in large disagreement, whereas two studies that predict 20 C ± 15% and 40 C plusmn 35% are in much closer agreement.
But I see it seems much more frequently, especially in fields like astronomy, too little thought goes into the systematic uncertainties, and you'll get 4 experiments measuring the same thing with results that cannot be reconciled if you take their statistics at face value. This was a huge problem with many of the early global warming predictions as well; every year a new estimation would come out that was completely incompatible with the previous one. Yes, these models are insanely complicated, and it's damn hard to understand all the systematics. And of course you can't put in error bars for plain old mistakes. But do it too many times, and people begin to lose any faith that your estimates can be relied on for anything.
This is the problem I see; not necessarily bias toward a positive result, but a bias toward underestimating the uncertainty of your measurement, which I suppose could be different sides of the same coin. (E.g., a result of 2 ± 0.1 is a positive result; a result of 2 ± 5 is not!).
Crap. I only thought I was posting as AC. Doh! :)
I remember a few days ago someone submitted a story about piracy for "The Avengers" being low compared to potential profits from them. A few high-ranked comments were like "This is yet another proof that [insert common /. parlance here]". I saw very few comments that stated the most plausible reason: a camcorded action film, with crappy audio and a shaking image, can't compete against the real thing. I thought the same thing: confirmation bias.
People do it all the time. If something can somehow support their views (specially if they don't RTFA) they'll use it as yet more confirmation. "I still don't get why this piece of evidence is discarded by everyone else! They must be delusional or have bad intentions". For example, I imagine this article will be used as evidence for: lack of funding, falling standards in the US, the demise of education, lack of scientific reasoning (maybe they'll even extend it to scientists themselves), and other common /. utterances. I wonder how many of them will actually say what I found out after RTFA...
So, everyone is playing the same game, and scientists are no exception. But hey, that study has numbers on it. At least you can try to replicate the findings, if only the entry barrier wasn't so high: these tests are *hugely* expensive. More collaboration may be a good idea. Shared laurels are better than none, right?
P.S., a nice article on confirmation bias (and other goodies) here.
I rarely respond to comments. Also, don't ask for clarifications: a brain and Google are faster, believe me!
Actually, science is stll working; the real trouble comes with the publicity of the science.
You should never believe the results of any single study. Every scientist knows this; or should know this. Science comes when results are confirmed, not when somebody publishes the first paper. The real work of science just starts when somebody publishes a study saying "we show that x has the effect y." That initial paper really is no more than "here's a place to start looking." However, newspapers want to publish news, and they need to publish whatever's hot and interesting and being done today, not "well, scientist z had his team take a look at the xy phenomenon to see if there was anything interesting there, and they couldn't really find anything there, although maybe some other research lab might have different results."
And, I suppose that somebody should post a link to the obligatory xkcd: http://xkcd.com/882/
http://www.geoffreylandis.com
Saying 'science is a method' is like saying 'Christ was a Jew'. True, but it doesn't change what happened.
Science was an idea designed to seek empirical truth. To find things in such a way that those who followed after could find them again. Then people got a hold of it and started using it as a means to control one another.
Christ (even from the atheist point of view, so bear with me) had a simple message of love being service to your fellow man. Then people got a hold of it and we get monstrosities like the Crusades.
That's where the 'HAS become' part of the above phrase kicks in...
You should thank God that FoxNews exists
Fox is the only "news" organization, ever, that went to court in the US to prove that they don't have to report news.
You are a complete and utter moron if you give whatever they say any credibility at all. This is not ad hominem. This is their own claim that whatever they report does not have to be based on any facts at all. None. Zero. Nada. They can make shit up out of whole cloth if they want. They have a Ruling saying they can.
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BMO
How many news organizations report false stories? Here's a hint; ALL OF THEM. It happens. We are human. It's USUALLY a mistake.
The difference is when FoxNews makes a mistake, they are sued by someone like yourself, only with extra money laying around, trying to silence the opposition and run FoxNews out of business. Did anyone sue to strip the license of NBC when they released a modified 911 call in the Trayvon Martin shooting? Did CBSNews have to go to court to defend their right to report stories that turn out to be false after that blatantly false Bush National Guard story?
Why is FoxNews different?
Also, the court case you are referring to was not about FoxNews, but a local Fox affiliate. The local affiliate was sued by a former reporter who didn't like the fact that they were made to include Monsanto's side of the story, which they claimed to be false. The part you are referring to where the court said the news organizations were allowed to lie did not come from FoxNews or the court, but a group called Project Censored, which from what I can tell is an anti-government, anti-media, anti-corporation organization. Your kinda people
There is no "I disagree" mod for a reason. Flamebait, Troll, and Overrated are not substitutes.
I would suggest it all started with Al Gore and Global Warming
You would be wrong and not only that, but without a sense of history at all. I can just point out Senator William Proxmire's (D, btw) "golden fleece award" given to the Aspen Movie Map with regards to "hurr, we don't understand the tech so we must be getting scammed" to Sarah Palin's bitching about silly "fruit fly experiments...hurr, we don't need those" - which comes from a long line of idiots decrying basic science, because their minds are *that* blinkered.
Never mind that the fruit fly experiments are all about genetics because fruit flies have lifespans of ... fruit flies so it makes heritability easier to study. Never mind the fact that the Aspen Movie Map was groundbreaking and you can now look back at it and say "Gee, I wonder where Google got their idea for Street View." But no, you don't hear about that. You hear on Fox that fruit fly studies are just wasting taxpayer money. Because Sarah Palin said so. Because she's such an expert in genetics. *spit*
Then the whole Climategate thing that showed the primary movers of AGW to be complete jerks and thoroughly unlikeable people.
So? It was found to be nothing more than egos. The science itself wasn't discredited, and has only strengthened since then. And I have voiced my opinions here about how badly I thought that it was being handled and my own strong skepticism about AGW in previous years. But you know what, I have recently (as in the past couple of years) found that the anti-AGW crowd to be increasingly full of *real* integrity problems and conflicts of interest.
Back to basic science:
Here's a clue for you and your buddies: You don't get applied science and engineering and fancy new products without basic science.
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BMO
And there's jerks like you who claim that anyone who dare look askance at your work are "anti-intellectual" are are too stupid to sort out what to trust in a scientific publication (are you saying that scientific publications, Nature, et. al. have untrustworthy material in it?)
Ah, classic twisting of my words. I'm talking about anti-intellectualism as a movement. Those doing it are extremely smart - that's what makes them good at it. They're good at duping people into following their cause. I am not personally calling individual people stupid unless they actually demonstrate that they are.
And yes, I'm absolutely saying that scientific publications contain untrustworthy information, including the big hitters like Science and Nature - their size and prestige is no assurance of infallibility, and in fact can work against them since people are often reluctant to question them. That's the nature of scientific publishing - until results have been replicated, single-source experiments and models need to be looked at with extreme skepticism.
Last year I performed some work that disproved a piece of published literature (in a non-controversial area of chemistry). I didn't set out to disprove it - I set out to see if I could replicate the results and I determined that the published paper was incorrect. My own conclusions, method and data set were published in response, with some discussion on why the previous paper was drawing incorrect conclusions (mainly an issue with experimental control). My situation is one that is repeated constantly - it's how science works. The stuff that can't be replicated is corrected, the stuff that is replicated becomes more solid.
It's not the layman's fault that they don;t understand some of the intricacies of how peer review and scientific publishing and research works. They're not stupid for not getting that in the same way that I'm not stupid for not understanding the first thing about programming - it's simply not my area of expertise. Where the stupidity *does* arise, however, is when people start to distrust scientists out of hand because they're being told to do so by certain media outlets or special interests. It happened with vaccinations due to a corrupt doctor manipulating a very weak study with the ultimate aim to push a competing vaccine made by a company that paid him off, but it backfired spectacularly - far from getting the competing vaccine popular, people rejected vaccination entirely against their own interests, putting their own and everyone else's kids at more risk. It's this sort of media frenzy and associated public panic and distrust of science (even now, people refuse to believe scientists on the issue, despite the original study being totally debunked and Wakefield himself being struck off the medical register et and the whole thing exposed as a sham).
That's the sort of thing I'm talking about here. We saw it with the MMR vaccine, we see it with nuclear power, we see it with stem cell research, we see it with GM foods (and there *are* some legitimate issues to be raised there, being drowned out by typical media hysteria), we see it with climate science - again, there are legitimate issues to be raised and discussed on a topic that is *gigantic* in scope in the scientific community, but it's being drowned in so much media hysteria and political propaganda that it's almost impossible to get anything done.
Of course, equating people who don't drink your Kool Aid to those who deny the Holocaust really helps your cause to be seen as our nights in shining armor.
Where did I say that? You're dangerously close to Godwining the thread by trying to imply that I brought that up when I did no such thing. The hyperbole serves no one, it only makes your arguments look weak.
I'm not looking to be anyone's "night [sic] in shining armor", nor are most scientists. We just work on the science in our field and go where that leads us. If we wanted to be knights rescuing people I'd have joined the fire service or something. I became a scientist to ultimately help mankind and further our collective knowledge, but I'm no superhero or white knight.
"Scientists" are not forcing anyone to do anything - that's what politicians do. We just do the science. Now, if we end up discovering, for example, that CFCs are damaging the ozone layer, or that PbEt4 in gasoline is poisoning the air then we bring that to the attention of people who can make a decision on what to do about that. We can certainly offer suggestions of what to do about it - stop using CFCs (and develop alternatives) and stop using PbEt4 in gasoline (and work on alternatives) etc, but ultimately sometimes changes have to be made that people aren't going to like.
We don't enjoy "telling people what to do" or set about to discover things that will allow us to dictate to people what to do - ideally we want to find solutions to things that have a minimal impact on people's lives.
We're not in this to control people - we just do science. We don't want to "force" people to do anything, but sometimes what we discover necessitates change in order to benefit everyone as a whole (like removing lead from gasoline, or switching to non-CFC propellants and refrigerants). That's just life I'm afraid.
Questioning is one thing, but wholesale declarations that the large majority of climatologists are liars or fools is another. What's more it's an old tactic developed by the Creationists in their attacks on evolution; declarations of a cabal of biologists out to hide the truth blah blah blah.
You act as if consensus is a bad thing. Do you think evolution is false because the overwhelming majority of biologists accept it? Do you think General Relativity and Quantum Mechanics is wrong because the overwhelming majority of physicists accept it? I'll wager you don't, but because AGW says "We keep vomiting vast amounts of CO2 into the atmosphere we're going to screw things up royally", which interferes with your short-term self interest, well, it must be false.
The world's burning. Moped Jesus spotted on I50. Details at 11.
Sorry, but you are asking for something that can be called the "everyone should be at the top" problem. Yes, it would be nice if everyone could understand science, scientific methods and what constitutes the difference between one result and a confirmed, peer-reviewed body of research.
It isn't going to happen that way.
What we need is to stop publishing unconfirmed, preliminary results in popular media. That by itself solves 90% of the problem. So who gets to decide when something is ready for 60 Minutes, Fox and Friends in the Morning or the Today Show? I don't know, but I know it isn't the news media and it should not be the original team reporting some unconfirmed results. Just a rule that says nothing gets copied out of scientific journals until it is marked as having been confirmed by at least one independent team would go a long, long way.
To me it seems a perfect example of how NON SCIENTISTS have made the expectations that scientists are not able to live up to.
The report was basically "Hey, guys, this looks odd, but we've corrected for everything we could think of. You may want to see if you can replicate this".
Nobody else managed to replicate.
MEANWHILE the original posters were being told how they had it wrong. They changed their process to accord for this and retained some extra difference, despite this. Another attempt by another team showed no effect, so the original scientists CONTINUED to see what could be the cause if not FTL neutrinos.
They then found that the 50ns difference can be accounted for if the connectors were not tight.
NOT, at that time, that this was the cause of the discrepancy, but that
a) the couplings were loose NOW, but they didn't check THEN, could have loosened since then
b) an effect of this is a slight delay, enough to remove the difference they'd seen
All absolutely fine and no "positive bias" AT ALL.
But what is the public saying about it? What were the press saying about it?
THAT debacle (and how it's ignored by the parties involved in it) is a perfect example of the problems science has with people who aren't scientists.