Here is a recent article about test scores from the New York Times, “No Rich Child Left Behind.” They got through the entire article without connecting cognitive abilities to inherited intelligence. Instead, the connection is made to wealth, poverty, and early childhood development. Do middle/upper class things for a child at night (“Goodnight Moon time”), and they are going to fit into the academic world created by the upper and middle classes in the schools. Goodnight Moon time in turn is highly correlated with poverty.
Note too that widening gaps between test scores for the upper 10% and the lowest 10% in terms of income have widened over the last 50 years. This in large part is because economic inequality has increased, and could not plausibly have to do with shifts in the gene pool of the last two generations (i.e. 50 years).
Tony Waters is czar and editor of Ethnography.com. He came to us from the Sociology department at California State University at Chico where he has been a professor since 1996. In 2016 though he suddenly found himself with a new gig at Payap University in northern Thailand where he is on the faculty of the Peace Studies Department. He has also been a guest professor in Germany, and Tanzania. In the past, his main interests have been international development and refugees in Thailand, Tanzania, and California. This reflects a former career in the Peace Corps (Thailand), and refugee camps (Thailand and Tanzania). His books include: Crime and Immigrant Youth (1999), Bureaucratizing the Good Samaritan (2001), The Persistence of Subsistence Agriculture: Life Beneath of the Marketplace (2007), When Killing is a Crime (2007), and Schooling, Bureaucracy, and Childhood: Bureaucratizing the Child (2012). His hobby is trying to learn strange languages–and the mistakes that that implies. Tony is a prolific academic, you can read more of his work at academia.edu.or purchase one (or more!) of his books from Amazon.com.