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The changes in the conditions of human life during the last twenty or thirty thousand years have been mainly brought about by the acceleration of invention through increasing co-operation and the release of material and social power. There have been no doubt climatic and geographical changes, but their share has been…
As we ascend the scale of cerebral development the possibility of teaching increases. It becomes possible to domesticate and train these higher-brain animals in just the measure that their brains are developed. You can teach very little to a fish or a reptile, but directly you come to the higher cerebral mammals you…
1. Seek Novelty There is only one trait out of the "Big Five" from the Five Factor Model of personality (Acronym: OCEAN, or Openness, Conscientiousness, Extroversion, Agreeableness, and Neuroticism) that correlates with IQ, and it is the trait of Openness to new experience. People who rate high on Openness are…
So let's think. What is it like to be a baby? What's it like to be a child? Our emotions go up and down. We might be in a sort of happy, sort of ecstatic state one minute, giggling, finding everything funny and silly - similar things happen on psychedelics - and then the next minute there's a sudden shift and we're…
It is a sign of the speed at which events are moving that Hurst and Blackett’s unexpurgated edition of Mein Kampf, published only a year ago, is edited from a pro-Hitler angle. The obvious intention of the translator’s preface and notes is to tone down the book’s ferocity and present Hitler in as kindly a light as…
Now let us examine more closely what we know scientifically about extinction. At the annual Congress of the American Association for the Advancement of Science, as held approximately ten years ago in Philadelphia, two papers were presented in widely-separated parts of the Congress. One was presented in anthropology…
The boy-genius can be seen as a specific instance of psychological neoteny which is apparently adaptive in modernizing cultures, and it occurred early in science because science is one of the most ‘modern’ and advanced social systems [2]. ‘Neoteny’ refers to the biological phenomenon whereby development is delayed…
In stark contrast to early suspicions that bilingual children were at risk of retardation or at best, “mentally confused” (Bialystok, 2005), recent research links bilingualism to cognitive reserve and suggests it may offer protection against dementia in old age. Cognitive reserve describes a kind of resilience which…
In a recent study, a group of psychologists decided to see if this differential reaction is simply behavioral, or if it actually goes deeper, to the level of brain performance. The researchers measured response-locked event-related potentials (ERPs)—electric neural signals that result from either an internal or…
Experience rearranges anatomical connectivity in the brain, but such plasticity is suppressed in adulthood. We examined the turnover of dendritic spines and axonal varicosities in the somatosensory cortex of mice lacking Nogo Receptor 1 (NgR1). Through adolescence, the anatomy and plasticity of ngr1 null mice are…
Formation of lasting memories is believed to rely on structural alterations at the synaptic level. We had found that increased neuronal activity down-regulates Nogo receptor-1 (NgR1) in brain regions linked to memory formation and storage, and postulated this to be required for formation of lasting memories. We now…
Experience may blind us from recognizing obvious solutions to problems. Research shows that physicians and health care professionals are likely to overlook the correct diagnosis in cases which do not match their experience [1]. Similar findings have been reported concerning difficulties in reframing clinical…
Plasticity is a double-edged sword; the more flexible an organism is the greater the variety of maladaptive, as well as adaptive, behaviors it can develop; the more teachable it is the more fully it can profit from the experiences of its ancestors and associates and the more it risks being exploited by its ancestors…
My mind seems to have become a kind of machine for grinding general laws out of large collections of facts, but why this should have caused the atrophy of that part of the brain that alone on which the higher tastes depend, I cannot conceive. A man with a mind more highly organised or better constituted than mine…
Past experiments have shown persuasively that exercise spurs the birth of new mitochondria in muscle cells and improves the vigor of the existing organelles. This upsurge in mitochondria, in turn, has been linked not only to improvements in exercise endurance but to increased longevity in animals and reduced risk for…
Other, less tragic kinds of evidence also support this idea. Most people have a much more difficult time learning a second language late in life than they do in childhood. Immigrants may try to learn the language of their new country, only to be outdone by their own children. When we visit a foreign country for a…
Let me suggest a new axiom: juxtaposition is the spice of life. Humanity’s biggest talent, unique to us, is juxtaposing, finding and operating novel relationships between things or ideas... Recent ideas on neural activity suggest that the brain operates in a very associative way, with small neuron clusters containing…