Analyzes national data and determines that an intercohort decline in vocabulary at all or most educational levels in recent years was closely related to an intercohort decline in newspaper reading. Includes six figures and four tables illustrating these conclusions. (CFR)

Maintains that intellectual ability has become a more important determinant of occupational success in recent decades, resulting in increased social class differences. Finds that, contrary to the usual view, class differences have become smaller and current social problems cannot be ascribed to low-ability people in the lower classes. (CFR)

Presents a procedure for analyzing statistical data involving distributions that is more informative about causal and other relationships. Finds test scores were affected positively by increased time on task, teachers with higher educational attainment, and better school facilities. (CFR)