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anonymous

Basics - Primal, Acute and Easily Duped - Our Sense of Touch - NYTimes.com - 0 views

    • anonymous
       
      The tactile map is not the territory...we always change what we come into contact with by our very presence; the observer effect.
  • The signals from the various touch receptors converge on the brain and sketch out a so-called somatosensory homunculus, a highly plastic internal representation of the body. Like any map, the homunculus exaggerates some features and downplays others.
    • anonymous
       
      Even our internat tactile maps of ourselves are not the true territory of our bodies.
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  • But on some tactile tasks, touch is all thumbs. When people are given a raised line drawing of a common object, a bas-relief outline of, say, a screwdriver, they’re stumped. “If all we’ve got is contour information,” Dr. Lederman said, “no weight, no texture, no thermal information, well, we’re very, very bad with that.”
    • anonymous
       
      Touch, like all senses, is best used in concert with the others.
  • Touch also turns out to be easy to fool. Among the sensory tricks now being investigated is something called the Pinocchio illusion. Researchers have found that if they vibrate the tendon of the biceps, many people report feeling that their forearm is getting longer, their hand drifting ever further from their elbow. And if they are told to touch the forefinger of the vibrated arm to the tip of their nose, they feel as though their nose was lengthening, too.
    • anonymous
       
      We'll discuss illusions in class, I've never been able to get the Pinocchio illusion to work but we can try it.
  • People who watch a rubber hand being stroked while the same treatment is applied to one of their own hands kept out of view quickly come to believe that the rubber prosthesis is the real thing, and will wince with pain at the sight of a hammer slamming into it.
    • anonymous
       
      This one we can try in class, but I lost my prosthetic hand last year.
  • Biologically, chronologically, allegorically and delusionally, touch is the mother of all sensory systems. It is an ancient sense in evolution: even the simplest single-celled organisms can feel when something brushes up against them and will respond by nudging closer or pulling away. It is the first sense aroused during a baby’s gestation and the last sense to fade at life’s culmination. Patients in a deep vegetative coma who seem otherwise lost to the world will show skin responsiveness when touched by a nurse.
  • “Touch is so central to what we are, to the feeling of being ourselves, that we almost cannot imagine ourselves without it,” said Chris Dijkerman, a neuropsychologist at the Helmholtz Institute of Utrecht University in the Netherlands. “It’s not like vision, where you close your eyes and you don’t see anything. You can’t do that with touch. It’s always there.”
  • For all its antiquity and constancy, touch is not passive or primitive or stuck in its ways. It is our most active sense, our means of seizing the world and experiencing it, quite literally, first hand. Susan J. Lederman, a professor of psychology at Queen’s University in Canada, pointed out that while we can perceive something visually or acoustically from a distance and without really trying, if we want to learn about something tactilely, we must make a move. We must rub the fabric, pet the cat, squeeze the Charmin. And with every touchy foray, Heisenberg’s Uncertainty Principle looms large. “Contact is a two-way street, and that’s not true for vision or audition,” Dr. Lederman said. “If you have a soft object and you squeeze it, you change its shape. The physical world reacts back.”
anonymous

Observatory - A New Lizard? Well, New to Science - NYTimes.com - 0 views

  • How did a species of lizard the size of a human remain undetected all these centuries? The answer is it didn’t. “It’s only new to science,”
    • anonymous
       
      Our zoological map is not the territory...although it just got a little closer to it.
  • The number of lizard species in the world — by most counts, around 4,000 — has just increased by one, with the announcement of a new species found on Luzon island in the Philippines.
anonymous

Confusing the Map for the Territory - 0 views

  • One of the most tragic outcomes of faithful belief comes out of its defense. Since a believer cannot defend a belief by testing it outside one's mind, the only defense comes out of language and emotion. While a scientist or an engineer can confirm or deny the reality of a theory by experimenting against matter and energy, a faithful believer must resort to experimenting with words and their meanings and the feelings they get from them. Unfortunately the symbols of language can collect various meanings for the same set of symbols that can lead to arguments about the
anonymous

How Did Economists Get It So Wrong? - NYTimes.com - 1 views

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    "I. MISTAKING BEAUTY FOR TRUTH It's hard to believe now, but not long ago economists were congratulating themselves over the success of their field. Those successes - or so they believed - were both theoretical and practical, leading to a golden era for the profession. On the theoretical side, they thought that they had resolved their internal disputes. Thus, in a 2008 paper titled "The State of Macro" (that is, macroeconomics, the study of big-picture issues like recessions), Olivier Blanchard of M.I.T., now the chief economist at the International Monetary Fund, declared that "the state of macro is good." The battles of yesteryear, he said, were over, and there had been a "broad convergence of vision." And in the real world, economists believed they had things under control: the "central problem of depression-prevention has been solved," declared Robert Lucas of the University of Chicago in his 2003 presidential address to the American Economic Association. In 2004, Ben Bernanke, a former Princeton professor who is now the chairman of the Federal Reserve Board, celebrated the Great Moderation in economic performance over the previous two decades, which he attributed in part to improved economic policy making. Last year, everything came apart. Few economists saw our current crisis coming, but this predictive failure was the least of the field's problems. More important was the profession's blindness to the very possibility of catastrophic failures in a market economy. During the golden years, financial economists came to believe that markets were inherently stable - indeed, that stocks and other assets were always priced just right. There was nothing in the prevailing models suggesting the possibility of the kind of collapse that happened last year. Meanwhile, macroeconomists were divided in their views. But the main division was between those who insisted that free-market economies never go astray and those who believed that economie
anonymous

Science Weekly podcast: What the brain can and can't do; Are we reaching the end of dis... - 0 views

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    "Professor Barry Smith, director of the Institute of Philosophy at the University of London explores what happens inside our heads when we recognise a friend or reach for a cup of coffee."
anonymous

Navigating Past Nihilism - NYTimes.com - 0 views

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    "God is dead in a very particular sense. He no longer plays his traditional social role of organizing us around a commitment to a single right way to live. "
anonymous

Weight Watchers Upends Its Points System - NYTimes.com - 1 views

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    "They and others had been searching for answers and grappling with their implications since Sunday, when Weight Watchers began unveiling its first major overhaul to its cultlike points system, prompting the 750,000 members who attend weekly meetings across the United States - and some one million online adherents - to rethink how they shop, cook and eat. The new plan, company officials say, is based on scientific findings about how the body processes different foods. The biggest change: All fruits and most vegetables are point-free (or free of PointsPlus, as the new program is called). Processed foods, meanwhile, generally have higher point values, which roughly translates to: should be eaten less. "
anonymous

Patternicity: Finding Meaningful Patterns in Meaningless Noise: Scientific American - 0 views

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    "Why do people see faces in nature, interpret window stains as human figures, hear voices in random sounds generated by electronic devices or find conspiracies in the daily news? A proximate cause is the priming effect, in which our brain and senses are prepared to interpret stimuli according to an expected model. UFOlogists see a face on Mars. Religionists see the Virgin Mary on the side of a building. Paranormalists hear dead people speaking to them through a radio receiver.\n1\nConspiracy theorists think 9/11 was an inside job by the Bush administration. Is there a deeper ultimate cause for why people believe such weird things? There is. I call it "patternicity," or the tendency to find meaningful patterns in meaningless noise."
anonymous

The New Humanism - NYTimes.com - 0 views

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    "I've come to believe that these failures spring from a single failure: reliance on an overly simplistic view of human nature. We have a prevailing view in our society - not only in the policy world, but in many spheres - that we are divided creatures. Reason, which is trustworthy, is separate from the emotions, which are suspect. Society progresses to the extent that reason can suppress the passions. This has created a distortion in our culture. We emphasize things that are rational and conscious and are inarticulate about the processes down below. We are really good at talking about material things but bad at talking about emotion. When we raise our kids, we focus on the traits measured by grades and SAT scores. But when it comes to the most important things like character and how to build relationships, we often have nothing to say. Many of our public policies are proposed by experts who are comfortable only with correlations that can be measured, appropriated and quantified, and ignore everything else. Yet while we are trapped within this amputated view of human nature, a richer and deeper view is coming back into view. It is being brought to us by researchers across an array of diverse fields: neuroscience, psychology, sociology, behavioral economics and so on. "
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