Henle also taught at the New School of Social Research in New York; she was involved in the writing of eight book publications and also helped develop the first psychology laboratory manual in 1948 based on the famous works of Kurt Lewin.

Leo Henle moved to the United States for economic reasons and to pursue his dream of becoming a scientist.

Henle then met Donald W. MacKinnon (who had studied Gestalt psychology in Berlin), this began her interactions with Kurt Lewin and introduced her to his kind of experimental research.

In 1941 Henle worked as a professor at the University of Delaware for one year until war efforts opened many jobs for psychologists.

[5] In 1942 Harry Helson called Henle back to Bryn Mawr, where she first taught psychology for graduate students.

In 1946 Solomon Asch invited Henle, on Köhler's recommendation, to become a professor at the New School for Social Research in New York.

[6] In an autobiographical retrospective Henle paid tribute to the many positive, supportive circumstances and assistantships that she had received for her scientific career.

[9] Henle was an addition to their own research life striving to make the Gestalt theory of the Berlin school (Wertheimer, Köhler, Koffka et al.) in their authentic basic positions in the United States known to represent and defend their view falsifying interpretations: In 1961, Henle gave the anthology Documents of Gestalt Psychology out, which after 1938 published collection A Sourcebook of Gestalt Psychology (edited by Willis D.

Henle's self-image as a representative and defender of the gestalt theory tradition finally comes perhaps most in the foreground in her 1986 anthology 1879 And All That.

This anthology contains some of her most incisive essays on key issues of Gestalt theory, the concepts, assumptions and terms used in psychology to scrutinize more carefully on their intellectual historical background and its actual meaning.

[11] In addition, she was not to pass judgment on the psychotherapeutic treatment method, but getting to grips with some meta-theoretical statements of Perls and their relation to Gestalt theory.