Aspects of the life and work ofSociety for the Psychological Study of Social Issues (SPSSI)'sfirst female president, Marie Jahoda (1907–2001), are examined to help reclaim social psychology's, andSPSSI's, lost connection to sociology. Throughout her career, Jahoda promoted a nonreductionistic, problem-focused sociological social psychology that was profoundly influenced by her early interdisciplinary training and by subsequent collaborations with otherSPSSImembers in New York City in the decade following WWII. Her use of the participant observation method, or immersion approach, was an outgrowth of her sociological sensibility. She used this approach to describe and explain the complex interactions between individuals and social structures in real-life settings. By placing Jahoda at the center of our analysis, we aim to complicate standard historical narratives about the loss of the sociological tradition within social psychology and re-assess the relationship between the two social psychologies. We argue that her legacy should be brought to bear on contemporary debates aboutSPSSI'ssocial relevance and may help re-envision the disciplinary boundaries of contemporary social psychology.