What is saul rosenzweig?

As an AI language model, I do not have access to the personal and private information of individuals. However, Saul Rosenzweig is a known psychologist who is best known for his work in the field of motivation and personality. He was a professor of psychology and psychiatry at the University of Pennsylvania and is noted for his contributions to the development of the concept of "need for achievement." He also made important contributions to the field of psychotherapy through his research on the effectiveness of various therapeutic techniques. Rosenzweig passed away in 2004.