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Are Distractible People More Creative?

September 16, 2010 / Klint Finley

Focus of Attention

Consider a recent study by neuroscientists at Harvard and the University of Toronto that documents the benefits of all these extra thoughts. (It was replicated here.) The researchers began by giving a sensory test to a hundred undergraduates at Harvard. The tests were designed to measure their level of latent inhibition, which is the capacity to ignore stimuli that seem irrelevant. Are you able to not think about the air-conditioner humming in the background? What about the roar of the airplane overhead? When you’re at a cocktail party, can you tune out the conversations of other people? If so, you’re practicing latent inhibition. While this skill is typically seen as an essential component of attention – it keeps us from getting distracted by extraneous perceptions – it turns out that people with low latent inhibition have a much richer mixture of thoughts in working memory. This shouldn’t be too surprising: Because they struggle to filter the world, they end up letting everything in. As a result, their consciousness is flooded with seemingly unrelated thoughts. Here’s where the data gets interesting: Those students who were classified as “eminent creative achievers” – the rankings were based on their performance on various tests, as well as their real world accomplishments – were seven times more likely to “suffer” from low latent inhibition. This makes some sense: The association between creativity and open-mindedness has long been recognized, and what’s more open-minded than distractability? People with low latent inhibition are literally unable to close their mind, to keep the spotlight of attention from drifting off to the far corners of the stage. The end result is that they can’t help but consider the unexpected.

Wired: Are Distractible People More Creative?

Photo by Hartwig HKD

UK Considers Regulating Intelligence Enhancing Drugs

August 4, 2010 / Klint Finley

Provigil

The government’s official experts on illegal drugs have been asked to look at whether intelligence-enhancing drugs, such as those used by students to boost performance in exams, should be banned.

Medical experts believe that a range of psychoactive drugs that includes those used to tackle the symptoms of Alzheimer’s and attention-deficit disorder in children, could fuel an already over-competitive society when used by the healthy.

Amid fears that the increase in online pharmacies means that such drugs are much more readily available, the Home Office has asked the Advisory Council on the Misuse of Drugs to see how this “rapidly evolving field” should be regulated. Just before she stepped down from office, the previous home secretary, Jacqui Smith, asked the advisory council to assess the harm – including that of possible psychological dependence or addiction – caused by this group of drugs when used by healthy adults.

Guardian: Government watchdog considers ban on IQ booster drugs

Photo by nym (CC)

Can Bacteria Make You Smarter?

May 30, 2010 / Klint Finley

Mycobacterium Vaccae

Exposure to specific bacteria in the environment, already believed to have antidepressant qualities, could increase learning behavior, according to research presented at the 110th General Meeting of the American Society for Microbiology in San Diego.

“Mycobacterium vaccae is a natural soil bacterium which people likely ingest or breath in when they spend time in nature,” says Dorothy Matthews of The Sage Colleges in Troy, New York, who conducted the research with her colleague Susan Jenks.

Science Daily: Can Bacteria Make You Smarter?

(via Dangerous Meme)

Dementia Caregivers More Likely to Also Get the Disease

May 18, 2010 / Klint Finley

older couple

Elderly people who care for a spouse who has dementia are at increased risk of developing dementia themselves, a study finds. The stress of attending to a mentally incapacitated spouse may somehow contribute to the added risk, scientists report in the May Journal of the American Geriatrics Society.

sciencenewsPrevious studies have shown that chronic stress leads to increased levels of the hormone cortisol in the body, which can suppress immunity, says study co-author Peter Rabins, a psychiatrist at Johns Hopkins School of Medicine in Baltimore who teamed with researchers at Utah State University in Logan to do this study. “It’s long been thought that this might have adverse outcomes psychologically and physiologically.”

Taking care of a spouse with dementia takes a toll in other ways as well, Rabins says. “Caregivers often complain that they lose their friends,” he says, because they don’t have time to socialize. But the biological mechanisms that might link these challenges to heightened dementia risk remain unclear.

Wired Science: Dementia Caregivers More Likely to Also Get the Disease

Prior research on social life and aging:

Socializing Appears to Delay Memory Problems

Socializing Can Help Elderly Women Stay Sharp

The Effect of Social Engagement on Incident Dementia

To Increase Longevity, Friends Are More Important Than Family

Smart kids wait for sex?

April 30, 2010 / Klint Finley

Durex machine

Maybe… (emphasis mine):

. RESULTS: Controlling for age, physical maturity, and mother’s education, a significant curvilinear relationship between intelligence and coital status was demonstrated; adolescents at the upper and lower ends of the intelligence distribution were less likely to have sex. Higher intelligence was also associated with postponement of the initiation of the full range of partnered sexual activities. An expanded model incorporating a variety of control and mediator variables was tested to identify mechanisms by which the relationship operates. CONCLUSIONS: Higher intelligence operates as a protective factor against early sexual activity during adolescence, and lower intelligence, to a point, is a risk factor. More systematic investigation of the implications of individual differences in cognitive abilities for sexual activities and of the processes that underlie those activities is warranted.

U.S. National Library of Medicine National Institutes of Health: Smart teens don’t have sex (or kiss much either)

I must be missing something because it looks to me like both higher and lower IQ teens were less likely to have sex. So doesn’t that mean being average is a risk factor?

(via Barking up the wrong tree via Dangerous Meme)

(Photo credit: castledweller / CC)

Study: Brain Exercises Don’t Improve Cognition

April 21, 2010 / Klint Finley

brain train

You’ve probably heard it before: the brain is a muscle that can be strengthened. It’s an assumption that has spawned a multimillion-dollar computer game industry of electronic brain-teasers and memory games. But in the largest study of such brain games to date, a team of British researchers has found that healthy adults who undertake computer-based “brain-training” do not improve their mental fitness in any significant way.

The study, published online Tuesday by the journal Nature, tracked 11,430 participants through a six-week online study. The participants were divided into three groups: the first group undertook basic reasoning, planning and problem-solving activities (such as choosing the “odd one out” of a group of four objects); the second completed more complex exercises of memory, attention, math and visual-spatial processing, which were designed to mimic popular “brain-training” computer games and programs; and the control group was asked to use the Internet to research answers to trivia questions.

All participants were given a battery of unrelated “benchmark” cognitive-assessment tests before and after the six-week program. These tests, designed to measure overall mental fitness, were adapted from reasoning and memory tests that are commonly used to gauge brain function in patients with brain injury or dementia. All three study groups showed marginal — and identical — improvement on these benchmark exams.

Time: Study: Brain Exercises Don’t Improve Cognition

(Thanks Bill)

I’ve read a couple articles now on this study, but I don’t know if this study included the n-back test, which has previously been found to actually work.

Ritalin boosts learning by increasing brain plasticity

March 8, 2010 / Klint Finley

Ritalin

Doctors treat millions of children with Ritalin every year to improve their ability to focus on tasks, but scientists now report that Ritalin also directly enhances the speed of learning.

In animal research, the scientists showed for the first time that Ritalin boosts both of these cognitive abilities by increasing the activity of the neurotransmitter dopamine deep inside the brain. Neurotransmitters are the chemical messengers neurons use to communicate with each other. They release the molecule, which then docks onto receptors of other neurons. The research demonstrated that one type of dopamine receptor aids the ability to focus, and another type improves the learning itself.

The scientists also established that Ritalin produces these effects by enhancing brain plasticity – strengthening communication between neurons where they meet at the synapse. Research in this field has accelerated as scientists have recognized that our brains can continue to form new connections – remain plastic – throughout life.

PhysOrg: Ritalin boosts learning by increasing brain plasticity

(via Chris S.)

Problem-solving crows may not be as smart as we thought

February 24, 2010 / Klint Finley

smart crow

a crow, when first faced with a bit of meat dangling from a bit of string, figures out a solution pretty much instantly. This has led researchers to posit that crows build mental models that generate solutions, instead of relying on trial and error. Now, a bunch of Kiwis have published research in PLoS One that suggests crows don’t actually build models.

What is the difference between model-based solutions and feedback-based solutions? When we rely on feedback, we first perform an action—pull on the string and trap it underfoot—if we perceive that we are closer to our goal (the meat is now closer), we repeat the action. A model-based solution, on the other hand, involves understanding that the meat is connected to a bit of string, and that to get the meat, we must pull the string up. In the second case, feedback after each step is not required, because we understand the problem and know that we will be rewarded in the end. […]

I must admit to having a little problem with that conclusion. First, one crow did solve the problem; second, the crows all varied widely in their performance on all of the tests, suggesting that problem-solving abilities vary wildly between individuals—no surprise there. Finally, I think the distinction between model-building and feedback-based problem solving skills are artificial points in a mental toolkit that spans a continuum.

Ars Technica: Problem-solving crows may not be as smart as we thought

Universities told to consider testing for smart drugs

February 23, 2010 / Klint Finley

smart drugs

Universities must investigate measures, including random dope testing, to tackle the increasing use of cognitive enhancment drugs by students for exams, a leading behavioural neuroscientist warns.

Student use of drugs, such as Ritalin and modafinil, available over the internet and used to increase the brain’s alertness, had “enormous implications for universities”, said Barbara Sahakian, a professor of clinical neuropsychology at Cambridge University’s psychiatry department.

Normally prescribed for neurological disorders including Alzheimer’s disease, attention deficit hyperactivity disorder (ADHD) and narcolepsy, such drugs boost acetylcholine in the brain, improving alertness and attention. Their use has prompted concerns that they could give students an unfair advantage. “This is something that universities really have to discuss. They should have some strategy, some kind of active policy,” Sahakian said.

Guardian: Universities told to consider dope tests as student use of ‘smart drugs’ soars

(via h+)

Previous look at smart drugs here at Technoccult

Secrets of octopus intelligence

February 1, 2010 / Klint Finley

fuck yeah octopus

Wood favors a conservative definition of tool use. By that standard—an animal using a solid object to solve an immediate problem, rather than just to provide defense against potential predators—there aren’t any real clear examples of octopuses using tools. But, he said, defining tool use isn’t a black or white issue. There’s no single, official right answer.

Mather works from a different, but still valid, definition. She doesn’t count the coconut shell as a tool, because the octopus isn’t modifying the shell in any way, and isn’t using it to alter other things in its environment.

But she does think octopuses use tools. In 1991, she documented octopuses collecting rocks and stacking them, outside the opening of a shelter, to form a protective fence. In fact, she said, the octopuses tended to do this before they went to sleep. That doesn’t count as tool use to Wood, but with several scientifically sound definitions, there’s room for interpretation.

Boing Boing: Behind the meme: Secrets of octopus intelligence

Cephalopods lovers should also check out Fuck Yeah Octopus.

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