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why has University Challenge lasted, virtually unchanged, for so long?

The answer may lie in a famous theory about our brains put forward by the psychologist Raymond Cattell in 1963

Cattell divided intelligence into two categories: fluid and crystallised. Fluid intelligence refers to basic reasoning and other mental activities that require minimal learning — just an alert and flexible brain.

Minimal manning—and with it, the replacement of specialized workers with problem-solving generalists—isn’t a particularly nautical concept. Indeed, it will sound familiar to anyone in an organization who’s been asked to “do more with less”—which, these days, seems to be just about everyone.

Ten years from now, the Deloitte consultant Erica Volini projects, 70 to 90 percent of workers will be in so-called hybrid jobs or superjobs—that is, positions combining tasks once performed by people in two or more traditional roles.

If you ask Laszlo Bock, Google’s former culture chief and now the head of the HR start-up Humu, what he looks for in a new hire, he’ll tell you “mental agility.

What availability bias tells us is that investors’ lingering perceptions of a dire market environment may be causing them to view investment opportunities through an overly negative lens, making it less appealing to consider taking on investment risk, no matter how small the returns on perceived “safe” investments.

“Imagine if I was a financial advisor and you came to talk to me about your risk attitude, and I started the discussion by asking you to describe how you felt in the last three years on the days when your portfolio lost 5% of its value. Then I asked you what your risk attitude was. Most people would say they don’t want to ever experience days like that again. On the other hand, what if instead I talked about people I knew who were retired and living in the Bahamas, fishing and golfing. Now your risk attitude would probably be different.”

As humans, our thinking is strongly influenced by what is personally most relevant, recent or dramatic.

I understand why scientifically minded people experience profound frustration at the nonsense, particularly when we’re forced to consider the public health implications of the anti-vaxxer movement which has been blamed as the root cause for recent outbreaks of measles in the US, a viral infection which can prove devastating for babies and young children. Misinformation can cause immense suffering and we should do our utmost to dispel the lies.

Too many people in scientific spheres seem to revel in dismissing flat-Earthers and anti-vaxxers as garden variety nut-jobs and losers. It may be cathartic – but it’s not productive.

It’s interesting that for a scientific community so perennially pleased with itself, we all seem to be making the same fundamental attribution error by ignoring the notion that belief in pseudoscience and conspiracy theories is propelled by external pressures of fear, confusion and disempowerment. Instead we seem too often satisfied with pinning the nonsense on some bizarrely flourishing individual idiocy.

Douglas Hofstadter, the Pulitzer Prize–winning author of Gödel, Escher, Bach, thinks we've lost sight of what artificial intelligence really means. His stubborn quest to replicate the human mind.

“If somebody meant by artificial intelligence the attempt to understand the mind, or to create something human-like, they might say—maybe they wouldn’t go this far—but they might say this is some of the only good work that’s ever been done

Their operating premise is simple: the mind is a very unusual piece of software, and the best way to understand how a piece of software works is to write it yourself.

Memory’s speed and accuracy begin to slip around age 25 and keep on slipping.

Now comes a new kind of challenge to the evidence of a cognitive decline, from a decidedly digital quarter: data mining, based on theories of information processing

Since educated older people generally know more words than younger people, simply by virtue of having been around longer, the experiment simulates what an older brain has to do to retrieve a word. And when the researchers incorporated that difference into the models, the aging “deficits” largely disappeared.

Piper, Mijares and their team published a description of the foot bone in 2010. They knew it was the oldest human remain in the Philippines, dated to 67,000 years ago, based on the amount of the radioactive element uranium in the fossil

Mijares returned to Callao Cave and uncovered more remains in 2011 and 2015. All told, the scientists pulled a dozen fossilized parts from the cave — teeth, a thigh bone, finger bones and foot bones, representing three individuals. Attempts to extract DNA from the remains were unsuccessful.

The body parts are diminutive, suggesting Homo luzonensis grew no more than four feet tall. Its molars have modern shapes. The way its leg muscle attached to its thigh bone is “distinctively human,”

have found evidence linking problems in the lymphatic and glymphatic systems to Alzheimer’s. In a study on mice, they showed that glymphatic dysfunction contributes to the buildup in the brain of amyloid beta, a protein that plays a key role in the disease.

several colleagues examined postmortem tissue from 79 human brains. They focused on aquaporin-4, a key protein in glymphatic vessels. In the brains of people with Alzheimer’s, this protein was jumbled; in those without the disease, the protein was well organized. This suggests that glymphatic breakdowns may play a role in the disease

The vessels have also been implicated in autoimmune disease. Researchers knew that the immune system has limited access to the brain. But at the same time, the immune system kept tabs on the brain’s status; no one knew exactly how. Some researchers theorize that the glymphatic system could be the conduit and that in diseases such as multiple sclerosis — where the body’s immune system attacks certain brain cells — the communication may go awry.

The moments we remember from the first years of our lives are often our most treasured because we have carried them longest. The chances are, they are also completely made up.

Around four out of every 10 of us have fabricated our first memory, according to researchers. This is thought to be because our brains do not develop the ability to store autobiographical memories at least until we reach two years old.

Yet a surprising number of us have some flicker of memory from before that age

Healthy adults built up Alzheimer’s-associated proteins in their cerebral spinal fluid when prevented from getting slow-wave sleep, the deepest stage of sleep, researchers report July 10 in Brain. Just one night of deep-sleep disruption was enough to increase the amount of amyloid-beta, a protein that clumps into brain cell‒killing plaques in people with Alzheimer’s. People in the study who slept poorly for a week also had more of a protein called tau in their spinal fluid than they did when well rested. Tau snarls itself into tangles inside brain cells of people with the disease.

THE problem is that a math model, like a metaphor, is a simplification. This type of modeling came out of the sciences, where the behavior of particles in a fluid, for example, is predictable according to the laws of physics.

In so many Big Data applications, a math model attaches a crisp number to human behavior, interests and preferences. The peril of that approach, as in finance, was the subject of a recent book by Emanuel Derman, a former quant at Goldman Sachs and now a professor at Columbia University. Its title is “Models. Behaving. Badly.”

A report last year by the McKinsey Global Institute, the research arm of the consulting firm, projected that the United States needed 140,000 to 190,000 more workers with “deep analytical” expertise and 1.5 million more data-literate managers, whether retrained or hired.

We tend to see ourselves as self-determining, self-conscious agents in all that we decide and do, and we cling to that image. But why? Why do we resist the truth? Why do we wish — strain, strive, against the grain of reality — to be autonomous individuals, and see ourselves as such?

why do we presume individual agency in the first place? Why do we insist on it stubbornly, irrationally, often recklessly?

though Republicans call for deep cuts to the safety net, their districts rely more on government support than their Democratic counterparts.

Coursekit is a new tool that lets teachers and educators create mini social networks around individual courses and lectures.

The goal of the service, said Joseph Cohen, its co-founder and chief executive, is to take some of the most successful elements of social networking — especially the fluid exchange of ideas that comes natural to online interactions — to revitalize the education experience. Students are already accustomed to interacting online and supplementing their daily lives with the Web and social media. Why should that stop when it comes to learning? “Our education experience is truly offline,” he said. “We want to build what Facebook has done for your personal life, but for your school.”

Using Coursekit’s software, teachers can upload homework assignments, answer questions, grade work and facilitate discussions with their students. In addition, students can use the software to chat with one another, collaborate on projects and share relevant materials with their classmates

The research team performed brain scans on 24 college students and recent graduates, both before and after they spent 100 hours studying for the LSAT over a three-month period. The researchers also scanned 23 young adults who didn't study for the test. For those who studied, the results showed increased connectivity between the frontal lobes of the brain, as well as between the frontal and parietal lobes, which are parts of the brain associated with reasoning and thinking.

The study focused on fluid reasoning—the ability to tackle a novel problem—which is a central part of IQ tests and can to some degree predict academic performance or ability in demanding careers.

"People assume that IQ tests measure some stable characteristic of an individual, but we think this whole assumption is flawed," said Silvia Bunge, the study's senior author. "We think the skills measured by an IQ test wax and wane over time depending on the individual's level of cognitive activity."

What was, in my view, a logical conclusion reached by the authors was too much for some researchers to take.

he conclusion of the Dmanisi study was that the variation in skull shape and morphology observed in this small sample, derived from a single population of Homo erectus, matched the entire variation observed among African fossils ascribed to three species - H. erectus, H. habilis and H. rudolfensis.

a single population of H. erectus,

Carr argued that the ease of online searching and distractions of browsing through the web were possibly limiting his capacity to concentrate. "I'm not thinking the way I used to," he wrote, in part because he is becoming a skimming, browsing reader, rather than a deep and engaged reader. "The kind of deep reading that a sequence of printed pages promotes is valuable not just for the knowledge we acquire from the author's words but for the intellectual vibrations those words set off within our own minds. In the quiet spaces opened up by the sustained, undistracted reading of a book, or by any other act of contemplation, for that matter, we make our own associations, draw our own inferences and analogies, foster our own ideas.... If we lose those quiet spaces, or fill them up with ‘content,' we will sacrifice something important not only in our selves but in our culture."

force us to get smarter if we are to survive. "Most people don't realize that this process is already under way," he wrote. "In fact, it's happening all around us, across the full spectrum of how we understand intelligence. It's visible in the hive mind of the Internet, in the powerful tools for simulation and visualization that are jump-starting new scientific disciplines, and in the development of drugs that some people (myself included) have discovered let them study harder, focus better, and stay awake longer with full clarity." He argued that while the proliferation of technology and media can challenge humans' capacity to concentrate there were signs that we are developing "fluid intelligence-the ability to find meaning in confusion and solve new problems, independent of acquired knowledge." He also expressed hope that techies will develop tools to help people find and assess information smartly.

76% of the experts agreed with the statement, "By 2020, people's use of the internet has enhanced human intelligence; as people are allowed unprecedented access to more information they become smarter and make better choices. Nicholas Carr was wrong: Google does not make us stupid."

mental faculties that improve with age.

Knowledge is a large part of the equation, of course. People who are middle-aged and older tend to know more than young adults, by virtue of having been around longer, and score higher on vocabulary tests, crossword puzzles and other measures of so-called crystallized intelligence.

the older brain offers something more, according to a new paper in the journal Psychological Science. Elements of social judgment and short-term memory, important pieces of the cognitive puzzle, may peak later in life than previously thought.

Alexis C. Madrigal Nov 17 2014, 7:59 PM ET Social networking is not, it turns out, winner take all. In the past, one might have imagined that switching between Facebook and “some other network” would be difficult, but the smartphone interface makes it easy to be on a dozen networks. All messages come to the same place—the phone’s notifications screen—so what matters is what your friends are doing, not which apps they’re using.

if I were to put money on an area in which Facebook might be unable to dominate in the future, it would be apps that take advantage of physical proximity. Something radically new could arise on that front, whether it’s an evolution of Yik Yak

The Social Machine, predicts that text will be a less and less important part of our asynchronous communications mix. Instead, she foresees a “very fluid interface” that would mix text with voice, video, sensor outputs (location, say, or vital signs), and who knows what else

Jonathan Weiler, a political scientist at the University of North Carolina at Chapel Hill, has spent much of his career studying the appeal of authoritarian figures: politicians who preach xenophobia, beat up on the press and place themselves above the law while extolling “law and order” for everyone else.

He is one of many scholars who believe that deep-seated psychological traits help explain voters’ attraction to such leaders. “These days,” he told me, “audiences are more receptive to the idea” than they used to be.

“In 2018, the sense of fear and panic — the disorientation about how people who are not like us could see the world the way they do — it’s so elemental,” Mr. Weiler said. “People understand how deeply divided we are, and they are looking for explanations that match the depth of that division.”