This work captures a lifetime of intelligence, from childhood to about age 80, and also explores general matters of intelligence. The book offers information related to IQ and its effects on cognitive aging and physical longevity.
The research summarized in this volume represents the most important study of individual differences in the history of the field. The work is distinguished by its use of a total population rather than a sample to investigate the importance of individual differences in intelligence from preadolescence to old age. -- Nathan Brody