Heritable IQ is Boosted by Environment, Just Like Height

hough it’s not easy to pinpoint the causes of the rise in IQ scores, it’s no paradox that a heritable trait can be boosted by changes in the environment. That’s what happened with height, a trait that also is highly heritable and has increased over the decades, and for some of the same reasons: better nutrition and less disease. Brains are greedy organs, consuming about a fifth of the body’s energy, and they are made of fats and proteins that are demanding for the body to produce. Fig...

 "No investigation no right to speak"

Everyone engaged in practical work must investigate conditions at the lower levels. Such investigation is especially necessary for those who know theory but do not know the actual conditions, for otherwise they will not be able to link theory with practice. Although my assertion, "No investigation no right to speak", has been ridiculed as "narrow empiricism", to this day I do not regret having made it; far from regretting it, I still insist that without investigation there cannot possibly be ...

 Temperament is Influenced by Chemicals

Some 40 percent to 60 percent of the observed variance in personality is due to traits of temperament. They are heritable, relatively stable across the life course, and linked to specific gene pathways and/or hormone or neurotransmitter systems. Moreover, our temperament traits congregate in constellations, each aggregation associated with one of four broad, interrelated yet distinct brain systems: those associated with dopamine, serotonin, testosterone, and estrogen/oxytocin. Each constellat...

 Latinos Less Likely to Be Online Than Whites

While about two-thirds of Latino (65%) and black (66%) adults went online in 2010, more than three-fourths (77%) of white adults did so. In terms of broadband use at home, there is a large gap between Latinos (45%) and whites (65%), and the rate among blacks (52%) is somewhat higher than that of Latinos. Fully 85% of whites owned a cell phone in 2010, compared with 76% of Latinos and 79% of blacks. Hispanics, on average, have lower levels of education and earn less than whites. Controlling f...