Is Psychometric g a Myth?
- "As an online discussion about IQ or general intelligence grows longer, the probability of someone linking to statistician Cosma Shalizi's essay g, a Statistical Myth
approaches 1. Usually the link is accompanied by an assertion to the effect that Shalizi offers a definitive refutation of the concept of general mental ability, or psychometric g
." [more inside]
posted by kliuless
on Apr 11, 2013 -
Heaven is Real: A Doctor's Experience of the Afterlife. As a neurosurgeon, I did not believe in the phenomenon of near-death experiences...In the fall of 2008, however, after seven days in a coma during which the human part of my brain, the neocortex, was inactivated, I experienced something so profound that it gave me a scientific reason to believe in consciousness after death.
posted by shivohum
on Oct 12, 2012 -
"Adrian Owen still gets animated when he talks about patient 23.
The patient was only 24 years old when his life was devastated by a car accident. Alive but unresponsive, he had been languishing in what neurologists refer to as a vegetative state for five years, when Owen, a neuro-scientist then at the University of Cambridge, UK, and his colleagues at the University of Liège in Belgium, put him into a functional magnetic resonance imaging (fMRI) machine and started asking him questions. Incredibly, he provided answers."
posted by jquinby
on Jun 15, 2012 -
Out-of-body experience: Master of illusion
: Out-of-body experiences are just part of Ehrsson's repertoire. He has convinced people that they have swapped bodies with another person, gained a third arm, shrunk to the size of a doll or grown to giant proportions.
[ . . . ]
But Ehrsson's unorthodox apparatus amount to more than cheap trickery. They are part of his quest to understand how people come to experience a sense of self, located within their own bodies. The feeling of body ownership is so ingrained that few people ever think about it — and those scientists and philosophers who do have assumed that it was unassailable.
[ . . . ]
Ehrsson's work also intrigues neuroscientists and philosophers because it turns a slippery, metaphysical construct — the self — into something that scientists can dissect.
posted by troll
on Jan 3, 2012 -
"In the Bible, God appeared to Ezekiel as a “wheel within a wheel”. Spirals and concentric circles are commonly found in petrogylphs carved by cultures long dead. Similar visual effects are reported during extreme psychological stress, fever delirium, psychotic episodes, sensory deprivation, and are reliably induced by psychedelic drugs." Form Constants and the Visual Cortex
, or Where Psychedelic Visuals Come From.
posted by Taft
on Mar 15, 2011 -
A Real Science of Mind Neurobabble piques interest in science, but obscures how science works. Individuals see, know, and want to make love. Brains don’t. Those things are psychological — not, in any evident way, neural.
posted by shivohum
on Dec 27, 2010 -
Cyborg Spy Beetles
are no longer a thing of the future. UC Berkeley (funded by DARPA) has created cyborg beetles guided wirelessly via laptop. These spy beetles were created with the intent of bugging actual conversations, literally acting as the "fly on the wall". [more inside]
posted by scrutiny
on Oct 27, 2009 -
What can we learn from quadrapeds about our own bipedal gait? Recently
, a group of researchers has taught rhesus macaques how to walk, and then used neural recordings to develop a model of a functioning brain-machine interface (BMI) designed to take the signals from your brain and use them to interface with a prosthetic leg, which would allow previously paralyzed patients to literally walk again. [more inside]
posted by scrutiny
on Oct 1, 2009 -
(fMRI) is a widely used technique of brain imaging in the cognitive sciences, allowing researchers to visualize what part of the brain is responding to certain stimuli, resulting in striking images
of live brains
. These days, fMRI is seeing more non-research use, such as forming the basis of controversial new lie detectors
. Craig Bennett, a postdoctoral researcher at UCSB, submitted a whole Atlantic salmon to fMRI analysis
, and found that this fish could apparently detect, and respond to, the the emotional state of human beings (poster
). Remarkable science, especially considering the salmon was dead at the time. [more inside]
posted by Rumple
on Sep 24, 2009 -
The Neuroscience of McGriddles:
Evolutionary biology offers hypotheses about why we enjoy eating. "When you eat at McDonald's, a big part of the pleasure comes from the fact that the food is sustenance, fuel, energy. Even mediocre food is a little rewarding."
posted by silby
on Jul 23, 2009 -
Neurosecurity: security and privacy for neural devices.
"An increasing number of neural implantable devices will become available in the near future due to advances in neural engineering. This discipline holds the potential to improve many patients' lives dramatically by offering improved—and in some cases entirely new—forms of rehabilitation for conditions ranging from missing limbs to degenerative cognitive diseases. The use of standard engineering practices, medical trials, and neuroethical evaluations during the design process can create systems that are safe and that follow ethical guidelines; unfortunately, none of these disciplines currently ensure that neural devices are robust against adversarial entities trying to exploit these devices to alter, block, or eavesdrop on neural signals. The authors define 'neurosecurity'—a version of computer science security principles and methods applied to neural engineering—and discuss why neurosecurity should be a critical consideration in the design of future neural devices." [Via Mind Hacks]
posted by homunculus
on Jul 8, 2009 -
We've discussed trepanation
, the boring of holes in the head as practiced in antiquity and by a fringe do it yourself-ers, before. There now seems to be research indicating that the procedure may have medical merit
, and even help stave off age related cognitive decline. This curious research brought to you by the Beckly Foundation
which "promotes the investigation of consciousness and its modulation
from a multidisciplinary perspective" and has a sweet logo.
posted by phrontist
on Jun 18, 2009 -