That same year she came to the United States to study with Kurt Koffka at Smith College as a research assistant in experimental psychology and decided to remain in the United States as the political situation in Germany deteriorated with the rise of the Nazi Party.
Dembo was appointed assistant professor at Mount Holyoke College (1943–1945) and then moved to Stanford University to direct research projects on rehabilitation psychology where she worked with Beatrice Wright.
[2] Dembo's doctoral thesis was translated into English as Field Theory as Human Science in 1976; in it "she laid the foundation of many concepts of field theory... Constructing a laboratory synthesis of anger she described how negative valences develop on the barriers between the participant and a goal, causing the participant to attempt to leave the field.
A secondary “external” barrier was set up that prevented leaving, causing a buildup of tension in the field that eventually broke down the boundaries between reality and fantasy and resulted in an outburst of anger by the participant.
"[3] In 1941 she co-authored Frustration and Regression: An Experiment with Young Children with Roger Barker and Kurt Lewin and Adjustment to Misfortune with Gloria Ladieu and Beatrice Wright in 1956.