Raymond B. Cattell's research has produced many conceptual, methodological, measurement, and data analysis tools for identifying and studying interindividual differences and similarities in intraindividual change patterns. Additional Cattell contributions to lifespan developmental research include personality and ability concepts and their…

The paper reviews research trends and findings on the development of personality in deaf individuals. The first section, "Adolescent and Adult Deaf Personalities," focuses on studies in the psychological literature that tend to promulgate stereotypical views of deaf people by reflecting researcher bias rather than researcher findings.…