Quotulatiousness

April 19, 2013

Enviro-Apocalypse Now (or real soon, anyway)

Filed under: Books, Environment, Media — Tags: , , — Nicholas @ 09:17

At sp!ked, Tim Black reviews the latest environmental doom-mongering tome from Andrew Simms:

All of this ought to leave Simms & Co looking like the boys who cried climate catastrophe. Yet somehow, as Cancel the Apocalypse shows, they are continuing, unabashed, to preach environmental doom despite its palpable absence. In fact, the hyper-pessimism has even been ramped up a bit. ‘The horsemen are galloping and there are more than four of them’, Simms chirrups. ‘Climate change, financial meltdown, the global peak and decline of oil production, a mass extinction event of plant and animal species, overuse of fresh water supplies, soil loss, economic infrastructure increasingly vulnerable to external shocks — it’s the age of the complex super disaster.’ It seems devastating climate change is no longer enough for Simms; he wants to solicit a whole host of other unrelated, and highly debatable, phenomena for his narrative of woe. Cancelled? No way, Simms chortles: the apocalypse is back on.

So how is Simms able to maintain his unshakeable belief in our imminent destruction? What makes him and his tweedy, right-on puritan mates different to, say, William Miller, founder of the Second Adventists (later to become the Seventh Day Adventists), who, as Simms tells us, believed the day of reckoning would fall in 1843, 1845, 1846, 1849, 1851, 1874 and 1999?

The ostensible answer is that whereas previous doomsayers derived their predictions from ‘gobbledygook floating up from patterns of words and numbers dimly discerned in books about faith and belief’, Simms and his followers rely upon ‘verifiable scientific experiment’. Of course, The Science.

Which is funny, because Cancel the Apocalypse does not contain much in the way of ‘verifiable scientific experiment’. What it does feature, though, is a scientistic use of the authority of science to justify a whole range of dubious assertions. In Simms’ hands, science is no longer science. It is a metaphor, an authority-bolstering gloss, allowing him to talk, for example, of socio-historical phenomena such as the economy in terms of the laws of nature: ‘Just as physical laws constrain the maximum efficiency of a heat engine’, he writes, so ‘economic growth is constrained by the finite nature of our planet’s natural resources, the variable but ultimately bounded biocapacity of its oceans, fields, geology and atmosphere’; and later on, ‘the laws of physics mean it is not possible to create the order of such [economic] exchanges without a little something being lost [Simms is referring to the biosphere]’.

April 18, 2013

Could this be the long-hoped-for breakthrough in battery technology?

Filed under: Science, Technology — Tags: , , , , — Nicholas @ 10:40

In The Register, Tony Smith discusses a new prototype battery that might be coming to your electronic devices … eventually:

Electronics continue to shrink to ever smaller sizes, but researchers are having a tough time miniaturising the batteries powering today’s mobile gadgets. Step forward, bicontinuous nanoporous electrodes.

Smartphones use smaller power packs than they did five years ago, it’s true, but that’s because their chips and radios are more power efficient, not because of any major new battery technology.

Now boffins from the University of Illinois at Urbana-Champaign reckon they have come up with a new pocket-friendly electricity supply.

Enter the “microbattery”, a compact power cell constructed from many three-dimensional nanoporous electrodes capable, its developers claim, of delivering both high power and a large energy capacity.

The negative cathode was devised by another team at the university, but graduate student James Pikul, working under Bliss Professor of mechanical science and engineering William King, figured out how to create a compatible anode and put the two into a battery.

[. . .]

The cathode design, devised by a team led by the University’s Professor Paul Braun, is fast charging. Pikul reckons building a battery out of it yields a rechargeable that can be filled up in a thousandth of the time it takes to charge a comparably sized regular rechargeable cell.

Building a battery in a lab is one thing. Working out how to manufacture it commercially at a price that makes it a realistic power source for future devices is another thing altogether. Pikul and King will be working on that next.

April 14, 2013

Differing national philosophies on child-raising

Filed under: Europe, Health, USA — Tags: , , , — Nicholas @ 10:56

In The Atlantic, Olga Khazan compares the way American parents interact with their children to the rather more relaxed parenting styles of other nations:

The biggest difference between American parents and their counterparts in Europe might be that they are far more relaxed about enrichment than we are, according to a study released this week by Sara Harkness and Charles M. Super at the School of Family Studies at the University of Connecticut.

Not only are Americans far more likely to focus on their children’s intelligence and cognitive skills, they are also far less likely to describe them as “happy” or “easy” children to parent.

“The U.S.’s almost obsession with cognitive development in the early years overlooks so much else,” Harkness told Slate.

For part of their research, the authors focused just on parents in the United States and the Netherlands. The differences are stark: American parents emphasized setting aside “special time” with each of their children, while Dutch parents spent a few hours each day together with their kids as an entire family.

American parents said they struggled to manage the sleep schedules of their babies and young children, explaining that they try to entertain or distract them when they wake up in the middle of the night.

April 12, 2013

Conor Friedersdorf: “Why Dr. Kermit Gosnell’s Trial Should Be a Front-Page Story”

Filed under: Health, Law, Media, USA — Tags: , , , , — Nicholas @ 11:34

In The Atlantic, Conor Friedersdorf explains why the Philadelphia horror story should be front-page news, but isn’t:

The grand jury report in the case of Dr. Kermit Gosnell, 72, is among the most horrifying I’ve read. “This case is about a doctor who killed babies and endangered women. What we mean is that he regularly and illegally delivered live, viable babies in the third trimester of pregnancy — and then murdered these newborns by severing their spinal cords with scissors,” it states. “The medical practice by which he carried out this business was a filthy fraud in which he overdosed his patients with dangerous drugs, spread venereal disease among them with infected instruments, perforated their wombs and bowels — and, on at least two occasions, caused their deaths.”

Charged with seven counts of first-degree murder, Dr. Gosnell is now standing trial in a Philadelphia courtroom. An NBC affiliate’s coverage includes testimony as grisly as you’d expect. “An unlicensed medical school graduate delivered graphic testimony about the chaos at a Philadelphia clinic where he helped perform late-term abortions,” the channel reports. “Stephen Massof described how he snipped the spinal cords of babies, calling it, ‘literally a beheading. It is separating the brain from the body.’ He testified that at times, when women were given medicine to speed up their deliveries, ‘it would rain fetuses. Fetuses and blood all over the place.'”

One former employee described hearing a baby screaming after it was delivered during an abortion procedure. “I can’t describe it. It sounded like a little alien,” she testified. Said the Philadelphia Inquirer in its coverage, “Prosecutors have cited the dozens of jars of severed baby feet as an example of Gosnell’s idiosyncratic and illegal practice of providing abortions for cash to poor women pregnant longer than the 24-week cutoff for legal abortions in Pennsylvania.”

Neuroscience or neurotrash?

Filed under: Media, Science — Tags: , , , , , — Nicholas @ 09:56

In The Register, Andrew Orlowski reports on the sad state of published neuroscience articles:

A group of academics from Oxford, Stanford, Virginia and Bristol universities have looked at a range of subfields of neuroscience and concluded that most of the results are statistically worthless.

The researchers found that most structural and volumetric MRI studies are very small and have minimal power to detect differences between compared groups (for example, healthy people versus those with mental health diseases). Their paper also stated that, specifically, a clear excess of “significance bias” (too many results deemed statistically significant) has been demonstrated in studies of brain volume abnormalities, and similar problems appear to exist in fMRI studies of the blood-oxygen-level-dependent response.

The team, researchers at Stanford Medical School, Virginia, Bristol and the Human Genetics dept at Oxford, looked at 246 neuroscience articles published in 2011 and and excluded papers where the test data was unavailable. They found that the papers’ median statistical power — the possibility that a study will identify an effect when there is an effect there to be found — was just 21 per cent. What that means in practice is that if you were to run one of the experiments five times, you’d only find the effect once.

A further survey of papers drawn from fMRI brain scanners — and studies using such scanners have long filled the popular media with dramatic claims — found that their statistical power was just 8 per cent.

Low statistical power caused three problems, the authors said. Firstly, there is a low probability of finding true effects; secondly, there is a low probability that a “true” finding is actually true; and thirdly, exaggerating the magnitude of the effect when a positive is discovered.

April 11, 2013

“Elite Panic” and the media gatekeepers

Filed under: Health, Law, Media — Tags: , , , , — Nicholas @ 15:57

There’s a pretty horrific tale unfolding in a Philadelphia court room, but most people won’t have heard about it because — while it’s bloody and otherwise eminently newsworthy — it will “send the wrong message” if it gets the traditional full-court press of media attention. At Ace of Spades H.Q., this is noted and explained by Ace:

I think this is how those who imagine themselves to be elite justify their complete embargo on the Kermit Gosnell serial-murder trial.

People who do evil generally don’t imagine they’re doing evil. In fact, some of the worst evils are perpetrated by those who’ve convinced themselves they’re doing good. One’s conscience tends to restrain one from evil; but if one can trick one’s conscience into thinking one’s doing good by doing evil, well. Then you’ve really got something.

I imagine the media believes it’s “doing good” by being so cautious about What Truths the Public Is Capable of Hearing. After all, if this Gosnell trial were publicized, people would Get Angry, and come to All the Wrong Conclusions, and put the allies of those in the media (such as NARAL and Planned Parenthood) on the defensive.

Hell, these maniacs might even get in into their skulls to hurt people!

Well, we can’t have that. We can’t let the Wrong Kind of Information — true information, but the sort of information the non-enlightened may be confused about — passing into the Wrong Kinds of Brains.

Thus, this embargo on the Gosnell story is not just partisan bias, fronting for the Democrats by refusing to mention anything that might be used as a wedge issue against them.

No, this embargo is done for the Public Good, even if the public is too stupid to understand that. If the public heard about these things … Well, that’s not gonna happen. Not on our watch.

It’s been occurring to me lately that much media behavior is explainable by this prism. They don’t want to report certain facts, not because the facts aren’t true (they’re facts by definition), but because they’re Concerned About The Capacity of Non-Journalists to Successfully Interpret These Facts.

April 10, 2013

The former players’ class-action suit against the NFL

Filed under: Football, Health, Law — Tags: , , — Nicholas @ 11:05

John Holler opines that the players are morally right, but that the legal system probably won’t give them the vindication they hope for:

Inaccurately known as the City of Brotherly Love – a more appropriate definition would be the City of Unholy Beat-Downs In the 600 Level – Philadelphia was the site Tuesday of the first big meeting on men in $5,000 suits and matching ties and pocket splash.

Judge Anita Brody heard arguments Tuesday from the NFL and a class-action group of more than 4,000 NFL players concerning the NFL’s culpability for not diagnosing concussions in the formative years of the NFL becoming the financial juggernaut it is today.

It’s a complicated and sometimes emotional battle. From a personal perspective, I teared up (that’s a generous description of it) after interviewing Brent Boyd at a time when he was a lone candle in the wind seeking justice for his injuries at a time when the NFL denied any connection to playing the game and post-concussion symptoms. Boyd was in an a cappella group at that time. Now he has a loud chorus of backup singers in the choir. Boyd was right when he told Congress that the NFL’s policy toward worker’s compensation claims were characterized – in his words – as, “Delay, deny and hope they die.”

On the other side of the coin is the legal question. It’s not a coincidence that Lady Justice, the sculpture of a woman holding the scales of justice, is blindfolded. The intent of that symbolism is that a jury can only render a verdict on the facts presented. A former NFL player from the 1970s once posed the question to me, “Does Boeing owe former employees more benefits now because the company became successful?” That was a hard pill to swallow considering that, even in the 1970s and 1980s, there were enough former players suffering from dementia and game-related debilitation that an impartial juror could see the connection between playing NFL football and the results that have followed in post-football life for thousands of former players. Yet, what does the current NFL owe them?

April 3, 2013

A “Bechdel Test” for writing about women in science

Filed under: Media, Science — Tags: , , , — Nicholas @ 13:52

If you haven’t heard of the original “Bechdel Test“, here’s the gist:

The Bechdel test is used to identify gender bias in fiction. A work passes the test if it features at least two women who talk to each other about something other than a man. Commentators have noted that a great proportion of contemporary works fail to pass this threshold of representing women. The test was originally conceived for evaluating films, but has since been applied to other media.

Have you ever noticed that articles in the media about female scientists always include details they would never have if the article was about a man? In too many cases, these details predominate over the actual scientific work of the person being profiled. Christie Aschwanden suggests that we adopt a variant of the Bechdel test for science writing:

It’s time to stop this nonsense. We don’t write “Redheads in Science” articles, so why do we keep writing about scientists in the context of their gonads? Sexism exists, and we should call it out when we see it. But treating female scientists as special cases only perpetuates the idea that there’s something extraordinary about a woman doing science.

So Finkbeiner has adopted a new approach. “I’m going to cut to the chase, close my eyes, and pretend the problem is solved; we’ve made a great cultural leap forward and the whole issue is over with,” she says. “And I’m going to write the profile of an impressive astronomer and not once mention that she’s a woman.” In other words, “I’m going to pretend she’s just an astronomer.”

It’s a fine idea. In the spirit of the Bechdel test, a metric that cartoonist and author Alison Bechdel created to measure gender bias in film, I’d like to propose a Finkebeiner test for stories about women in science. The test could apply to profiles of women in other fields, too.

To pass the Finkbeiner test, the story cannot mention

  • The fact that she’s a woman
  • Her husband’s job
  • Her child care arrangements
  • How she nurtures her underlings
  • How she was taken aback by the competitiveness in her field
  • How she’s such a role model for other women
  • How she’s the “first woman to…”

Here’s another trick. Take the things that are said about a female subject and flip them around as if they were said about a male. If they sound ridiculous, then chances are good they have no business in the story. For instance, in his Guardian profile of preeminent physicist Lisa Randall, John Crace writes, “No matter how much she bends time, there’s no escaping the fact that she’s just turned 43 and that if she wants to have kids she’s going to have to get on with it soon.” No one would possibly write such a thing about a man of her age and status.

Parenting classes are a waste of time and money

Filed under: Education, Government, Health — Tags: , , , — Nicholas @ 10:02

Elizabeth and I took parenting classes, as neither of us had much experience of dealing with infants or small children before our son was born. Although the instructor was good at being re-assuring that we’d do fine as parents, almost none of the “skills” we were taught were actually of much use after the baby arrived. Since those early-90’s days, parenting courses have become even more common, but as Frank Furedi points out, no more relevant to the actual needs of parents and their newborns:

The parenting programmes promoted by government are based on a mixture of prejudice and the pseudoscience of so-called parenting research. Such ‘research’ is underpinned by a fundamental transformation in the meaning of parenting, which has been turned from a relationship into a skill. The core assumption in the government’s proposal for parenting classes is that childrearing consists of a set of practices that need to be learned by mothers and fathers. These practices are depicted as skills which can be taught by those who have the requisite professional qualifications.

No one could dispute that childrearing is something that is learned by mothers and fathers. Every human relationship involves a continual process of learning and gaining an understanding of the other person. Parents need to learn how to engage with the imagination of their child, how to stimulate her and when and how to restrain her from doing something harmful. Successful parents learn on the job. However, the really useful lessons we are learning have little to do with abstract skills, but rather are about understanding the relationship we have with our children.

The question is not whether parenting has to be learned, but whether it can be taught. Not everything that has to be learned can be taught. Parenting cannot be taught because it is about the forging and managing of an intimate relationship. And it is through the conduct of that relationship that people develop the insights and lessons suitable to their lives and conditions. One reason why professional intervention into family life is unlikely to have beneficial results is because each relationship contains something unique, which is only grasped by those involved in it.

[. . .]

However, the project of transforming parenting into a skill does have negative and potentially harmful consequences. When human relationships are recast as skills to be managed by professional trainers something very important happens in the way we conduct our personal affairs. As I argue in my study Paranoid Parenting such policy interventions cultivate a kind of learned helplessness among parents. Through exaggerating the complexity of child-rearing, parenting experts contribute to the eroding self-reliance of modern mums and dads. Inevitably, the principal outcome of such interventions is to distract parents from learning from their own experience. And yet learning from experience is the key to developing the confidence for making those crucial judgment calls that confronts parents on a daily basis.

March 29, 2013

Demonizing smokers hasn’t forced them to quit … let’s start sending them to psychiatric care instead

Filed under: Britain, Health, Media — Tags: , , , , , — Nicholas @ 09:53

When the all the persuasion, “nudging”, shaming, harassment, and legal shenanigans haven’t worked, try taking a leaf out of the old Soviet Union playbook for dealing with dissidents:

Smoking may be a sign of psychiatric illness, experts say. Doctors should routinely consider referring people who smoke to mental health services, in case they need treatment, they add.

The controversial recommendation from the British Lung Foundation, a charity, comes in response to a major report, Smoking and Mental Health, published this week by the Royal College of Physicians and the Royal College of Psychiatrists with the Faculty of Public Health. It says that almost one in three cigarettes smoked in Britain today is smoked by someone with a mental disorder. When people with drug and alcohol problems are included the proportion is even higher.

The reason is that smoking rates have more than halved over the past 50 years, but the decline has not happened equally in all parts of society.

“Smoking is increasingly becoming the domain of the most disadvantaged: the poor, homeless, imprisoned and those with mental disorder. This is a damning indictment of UK public health policy and clinical service provision,” the report says.

March 28, 2013

British energy prices graphically explained

Filed under: Britain, Environment, Government — Tags: , , , , — Nicholas @ 08:24

At The Register, Lewis Page debunks the propaganda from the government and shows the cost components of British energy prices from the government’s own published source:

The government’s Department of Energy and Climate Change, with the current minister as mouthpiece, has just pushed out a report claiming that its green policies are saving us money now and will save us even more in coming decades. Can it be true? We can save the planet — or anyway reduce carbon emissions — and it not only costs nothing, but puts money in our pockets?

In a word, no: of course not. If that was true there would be no need for government action, we’d be acting to reduce carbon emissions on our own. And indeed, once you skip the foolish tinned quotes and bogo-stats in the executive summary, the report itself makes it very clear that in fact green policies are already to blame for most of the sustained climb in electricity prices we’ve suffered over the past decade — and that it’s going to get a lot worse.

The blue and brown bars are what you would pay without green intervention. The rest is thanks to the greens.

The blue and brown bars are what you would pay without green intervention. The rest is thanks to the greens.

So there you are, plain as day. The various green interventions in the UK and EU energy markets which have come in since the turn of the century are already costing you a hefty sum — the government have already forced up the price you pay for electricity today by nearly 20 per cent over where it would have been if they’d left matters alone. If they carry on as planned, by the year 2030 they will have managed to drive it up by more than a third over where it would normally be.

March 26, 2013

Take diet change recommendations with a pinch of salt

Filed under: Food, Government, Health, Media, Science — Tags: , , — Nicholas @ 08:59

Yes, yes, I know salt is one of the most dangerous substances known to man. Well, this week, anyway. Next week they may decide to recommend doubling your daily intake instead of reducing it. It’s an example of the nanny state’s long history of providing inconsistent — and sometimes even dangerous — dietary advice:

The government told people to switch from saturated animal fats to unsaturated vegetable fats. But that advice may have killed a lot of people. As David Oliver notes, a recent study “in the British Medical Journal” shows that ”those who heeded the advice” from public-health officials “to switch from saturated fats to polyunsaturated vegetable oils dramatically reduced their odds of living to see 2013,” incurring up to a ”60% increase in risk of death by switching from animal fats to vegetable oils.” This possibly deadly medical advice has a long history:

    Fifty years ago the medical community did an about-face … and instead went all in on polyunsaturated fats. It reasoned that since (a) cholesterol is associated with cardiovascular disease and (b) polyunsaturated fats reduce serum cholesterol levels, it inescapably followed that (c) changing people’s diet from saturated fats to polyunsaturated fats would save a lot of lives. In 1984 Uncle Sam got involved – Time magazine reported on it in “Hold the Eggs and Butter” – and he made a big push for citizens to swap out animal fat in their diet for the vegetable variety and a great experiment on the American people was begun.

As Oliver, an expert on mass torts, points out, it is hard to ”think of any mass tort, or combination of mass torts, that has produced as much harm as the advice to change to a plant oil-based diet” may have done.

Some federal food-safety regulations have also harmed public health, such as the “poke and sniff” inspection method “that likely resulted in USDA inspectors transmitting filth from diseased meat to fresh meat on a daily basis.” The Obama administration has foolishly discouraged potato consumption, even though potatoes are highly nutritious, even as it has subsidized certain sugary and fatty foods, and promoted bad advice about salt.

March 24, 2013

Humans are very good at spotting patterns … even when they aren’t really there

Filed under: Environment, Health, Media, USA — Tags: , — Nicholas @ 00:01

In Slate, George Johnson explains why the human ability to detect patterns can sometimes work against us:

Lay a chessboard on a table. Then grab a handful of rice and let the grains fall and scatter where they may. They won’t spread out uniformly with the same number occupying each square. Instead there will be clusters. Now suppose that the chessboard is a map of the United States and the grains are cases of cancer.

Each year about 1.6 million cases of cancer are diagnosed in the United States, and epidemiologists regularly hear from people worried that their town has been plagued with an unusually large visitation. Time after time, the clusters have turned out to be statistical illusions — artifacts of chance.

The Erin Brockovich incident, one of the most famous, is among the many that have been debunked. Hexavalent chromium in the water supply of a small California town was blamed for causing cancer, resulting in a $333 million legal settlement and a movie starring Julia Roberts. But an epidemiological study ultimately showed that the cancer rate was no greater than that of the general population. The rate was actually slightly less.

March 23, 2013

Human Achievement Hour 2013

Filed under: Economics, Environment, Liberty, Politics — Tags: , , , , — Nicholas @ 00:01

Oh, right. It’s once again time for the Gaia-worshippers to do an hour’s penance for the crime of being alive in an industrialized society. The Competitive Enterprise Institute proposes a different way of using that hour:

On Saturday, March 23 at 8:30pm (local time), some people, businesses and governments around the world will choose to sit in the dark for one hour as a symbolic gesture to take action against climate change. The organizers of Earth Hour say that they [no] longer expect energy use to actually drop during the hour, but instead see it as a way for people to show their commitment to reducing energy use and taking action beyond the hour.

It’s absolutely every person’s right to decide if they want to conserve energy for whatever reason; they are free to sit in the dark as long as they want. However, it should not be their right to impose their beliefs or opinions on others. And that is what is at the heart of the environmentalist movement. While many participants in Earth Hour sincerely want a cleaner environment — a desire most of us share — the environmentalist movement whether implicitly or explicitly seeks to clamp down on human progress by reducing energy consumption whether through regulation and taxation. They want to make fossil fuels, which they see as dirty, more expensive to encourage the use of renewable “greener” energies.

Despite any good intentions, the ultimate result of environmentalist policies is not a healthier, cleaner environment. Instead we will see a population that is sicker and poorer. The only way we achieve technology that is “greener” is by building on older “dirtier” technology. As we make it harder and more expensive for those in the business of creating new technologies, all we do is slow progress and make it that much longer to reach more environmentally friendly solutions.

March 21, 2013

“Henrich had thought he would be adding a small branch to an established tree of knowledge. It turned out he was sawing at the very trunk.”

Filed under: Americas, Economics, Science — Tags: , , , , — Nicholas @ 10:02

By way of Five Feet of Fury, an interesting story about challenging some very basic assumptions about psychology:

While the setting was fairly typical for an anthropologist, Henrich’s research was not. Rather than practice traditional ethnography, he decided to run a behavioral experiment that had been developed by economists. Henrich used a “game” — along the lines of the famous prisoner’s dilemma — to see whether isolated cultures shared with the West the same basic instinct for fairness. In doing so, Henrich expected to confirm one of the foundational assumptions underlying such experiments, and indeed underpinning the entire fields of economics and psychology: that humans all share the same cognitive machinery — the same evolved rational and psychological hardwiring.

[. . .]

When he began to run the game it became immediately clear that Machiguengan behavior was dramatically different from that of the average North American. To begin with, the offers from the first player were much lower. In addition, when on the receiving end of the game, the Machiguenga rarely refused even the lowest possible amount. “It just seemed ridiculous to the Machiguenga that you would reject an offer of free money,” says Henrich. “They just didn’t understand why anyone would sacrifice money to punish someone who had the good luck of getting to play the other role in the game.”

The potential implications of the unexpected results were quickly apparent to Henrich. He knew that a vast amount of scholarly literature in the social sciences — particularly in economics and psychology — relied on the ultimatum game and similar experiments. At the heart of most of that research was the implicit assumption that the results revealed evolved psychological traits common to all humans, never mind that the test subjects were nearly always from the industrialized West. Henrich realized that if the Machiguenga results stood up, and if similar differences could be measured across other populations, this assumption of universality would have to be challenged.

Henrich had thought he would be adding a small branch to an established tree of knowledge. It turned out he was sawing at the very trunk. He began to wonder: What other certainties about “human nature” in social science research would need to be reconsidered when tested across diverse populations?

A notion that’s popped up several times in the last couple of months is that the easy access to willing test subjects (university students) introduces a strong bias to a lot of the tests, yet until recently the majority of studies disregarded the possibility that their test results were unrepresentative of the general population.

« Newer Posts — Older Posts »

Powered by WordPress