Status Updates From The g Factor: The Science o...

Delinquents and adult criminals typically average ten to twelve IQ points below law-abiding persons living in similar circumstances. Juvenile delinquents who become adult criminals have lower IQs than delinquents who do not become criminals. Recidivists have lower IQs than one-time offenders. In home environments or in
neighborhoods that are conducive to delinquent or criminal behavior, an
above-average IQ acts

Persons of subthreshold g who are not members of the underclass constitute a relatively small percentage of the general population that is gainfully employed and lives in wholesome neighborhoods. Although low IQ persons who are reared in the favorable environment of fully capable parents and relatives experience the usual cognitive disadvantages of subthreshold g in scholastic performance and level of employment

How g was discovered. Even if Spearman certainly was wrong on some issues and his mathematics was not elegant, the persistence of his thinking during the last 100+ years has been strong. The science of mental ability has been attacked by many people - even more than Darwin's theory of evolution. However it has persisted and developed further through a scientific process.