Jack Block

Psychologist, Author

1924 – 2010


Who was Jack Block?

Jacob "Jack" Block was a notable psychology professor at UC Berkeley. His main areas of research were personality theory, personality development, research methodology, personality assessment, longitudinal research, and cognition. He often collaborated with his wife and colleague Jeanne Block.

His most renowned body of work, undertaken primarily with his wife, was a longitudinal study on a cohort of more than 100 San Francisco Bay Area toddlers. He studied them regularly for nearly 30 years. Unlike most longitudinal studies, the Blocks' focused on the psychological makeup and history of the subjects, rather than quantitative measures such as IQ. The study tracked how the subjects' background influenced their later choices and the outcomes of their lives.

Block was born in Brooklyn, New York, and received a bachelor's degree from Brooklyn College. He earned his Ph.D. from Stanford University in 1950. He received many awards over the years and was a fellow of the American Association for the Advancement of Science.

One of Professor Block’s studies drew particular notice in the news media. Published in The Journal of Research in Personality in 2006, it found that subjects who at 3 years old had seemed thin-skinned, rigid, inhibited and vulnerable tended at 23 to be political conservatives. On the other hand, 3-year-olds characterized as self-reliant, energetic, somewhat dominating and resilient were inclined to become liberals.

We need you!

Help us build the largest biographies collection on the web!

Apr 28, 1924
  • United States of America
  • Stanford University
  • Brooklyn College
Jan 13, 2010

on July 23, 2013


Use the citation below to add to a bibliography:


"Jack Block." Biographies.net. STANDS4 LLC, 2022. Web. 23 Jan. 2022. <https://www.biographies.net/people/en/jack_block>.

Discuss this Jack Block biography with the community:


    Browse Biographies.net