Intergroup variations in IQ

The Jason Richwine dissertation, like its predecessor The Bell Curve in 1994, argued that IQ scores are a good proxy for intelligence, that intelligence has a substantial hereditary component and is thus largely immutable to change by external measures, and that high IQ levels are significant predictors of economic and social success in life while low levels predict a life of crime, unemployment, and general failure. According to Richwine, American Hispanics have average IQs around 89 (the overall average is fixed to be 100) and thus Hispanic immigrants will be a drain on society. (See here and here for earlier posts on this.) [Read more…]

Stephen Colbert on the Heritage-Richwine affair

He provides a pretty good summary and commentary of the issue that I have been writing about (see here and here).

(This clip was aired on May 14, 2013. To get suggestions on how to view clips of The Daily Show and The Colbert Report outside the US, please see this earlier post.)

Memoir of a Guantanamo prisoner

SlahiMohamedou Ould Slahi is one of the Gunatanmo detainees condemned to indefinite detention. In 2005 he started writing his memoirs in English. His draft of 466 handwritten pages was completed a year later but the authorities suppressed it for six years. A redacted version has finally been published. Selected excerpts from the memoir can be here, prefaced by an introduction by Larry Siems who explains how Slahi ended up at Guantanamo. [Read more…]

The viruses hidden in our DNA

I have heard about retroviruses and that HIV belonged to that family but not being a biologist knew nothing more about what a retrovirus was and how it differed from any other virus. This article by Carl Zimmer explains what they are and in addition says that new research about them has revealed that we all have a lot of retroviruses that invaded our DNA a long time ago and that over time have mutated to become either inactive or dormant. [Read more…]

Charles Knowlton and the golden age of freethought

If you asked me to list the names of 19th century American atheists, I would have said Robert G. Ingersoll (1833-1899) and stopped. He is clearly the most famous but it turns out that there is another person who preceded him, and that was Dr. Charles Knowlton. I became aware of him because of a new biography titled An Infidel Body-Snatcher and the Fruits of His Philosophy by Dan Allosso. [Read more…]

The politics of group identities and IQ

When the Heritage Foundation published its report on the huge cost of the proposed immigration reform package, there was criticism of its methodology. (See here for the background on this story.) One was that the report’s estimated net cost to the economy of $6.3 trillion was arrived at by projecting over the next fifty years and no one takes seriously such long-term projections. Even numbers ten years out are highly iffy. The suspicion was that fifty years was chosen to get a large dollar number that was scary and/or because in the short run there would actually be net plus to the economy due to younger immigrant workers contributing more, while the costs would increase when they became older and reached retirement [Read more…]