20th-century American psychologists

Neal Elgar Miller (August 3, 1909 – March 23, 2002) was an American experimental psychologist. Described as an energetic man with a variety of interests, including physics, biology and writing, Miller entered the field of psychology to pursue these. With a background training in the sciences, he was inspired by professors and leading psychologists at the time to work on various areas in behavioral psychology and physiological psychology, specifically, relating visceral responses to behavior.
Miller's career in psychology started with research on "fear as a learned drive and its role in conflict". Work in behavioral medicine led him to his most notable work on biofeedback. Over his lifetime he lectured at Yale University, Rockefeller University, and Cornell University Medical College and was one of the youngest members of Yale's Institute of Human Relations. His accomplishments led to the establishment of two awards: the New Investigator Award from the Academy of Behavioral Medicine Research and an award for distinguished lectureship from the American Psychological Association. A Review of General Psychology survey, published in 2002, ranked Miller as the eighth most cited psychologist of the 20th century.

Laleh Mehree Bakhtiar (born Mary Nell Bakhtiar; July 29, 1938 – October 18, 2020) was an Iranian-American Islamic and Sufi scholar, author, translator, and psychologist. She produced a gender-neutral translation, The Sublime Quran, and challenged the status quo on the Arabic word daraba, traditionally translated as "beat" — a word that she said has been used as justification for abuse of Muslim women.

Emil Wolfgang Menzel Jr. (April 16, 1929 – April 7, 2012) was a prominent primatologist and comparative psychologist.
In many ways, his pioneering observations and research laid the foundation and set the precedent for many contemporary research topics in psychology and primatology including nonverbal and gestural communication, theory of mind and behavioral economics.

Edward F. Edinger (December 13, 1922, in Cedar Rapids, Iowa – July 17, 1998, in Los Angeles, California) was a medical psychiatrist, Jungian analyst and American writer.

June Singer (1920 – January 19, 2004) was an American analytical psychologist. She co-founded the Analytical Psychology Club of Chicago, later the Jung Institute of Chicago, as well as the Inter-Regional Society of Jungian Analysts. She helped to popularize Carl Jung's theories in the United States, and wrote several well-regarded books.

Stuart Wellford Cook (April 15, 1913—March 25, 1993) was an American social psychologist known for his research on the societal effects of racism and religious intolerance. He is particularly known for a study he conducted with Isidor Chein and Kenneth Bancroft Clark on the psychological effects of racial segregation. This study was cited by the appellates in the 1954 landmark United States Supreme Court case Brown v. Board of Education. His research also focused on many other psychological subjects, including clinical psychology, military psychology, and psychological research methods.

Neil Clark Warren (born September 18, 1934) is an American clinical psychologist, Christian theologian, seminary professor and co-founder of the online relationship sites eHarmony and Compatible Partners.
In 1995, Warren and his son-in-law, Greg Forgatch, created Neil Clark Warren & Associates, a company which offers seminars and teaching tools based on Warren's books. In early 2000, they established eHarmony, an online compatibility matching service which gained two million users in its first three years. After retiring in 2007, Warren came out of retirement in July 2012, returning as the chief executive of eHarmony.

Hans Wallach (November 28, 1904 – February 5, 1998) was a German-American experimental psychologist whose research focused on perception and learning. Although he was trained in the Gestalt psychology tradition, much of his later work explored the adaptability of perceptual systems based on the perceiver's experience, whereas most Gestalt theorists emphasized inherent qualities of stimuli and downplayed the role of experience. Wallach's studies of achromatic surface color laid the groundwork for subsequent theories of lightness constancy, and his work on sound localization elucidated the perceptual processing that underlies stereophonic sound. He was a member of the National Academy of Sciences, a Guggenheim Fellow, and recipient of the Howard Crosby Warren Medal of the Society of Experimental Psychologists.

Peter G. Ossorio (4 May 1926 – 24 April 2007) was an American psychologist best known for his development of descriptive psychology, a pragmatic and theory neutral pre-empirical approach to the study of behavior. Ossorio in his 2006 volume, The Behavior of Persons, explicated the concept of "Persons" by creating a conceptual map of the interdependent concepts of "Individual Person", "Language", "Action", and "Reality". He described persons as individuals whose history is, paradigmatically, a history of Deliberate Action in a dramaturgical pattern.

Jean Shinoda Bolen (born June 29, 1936) is an American psychiatrist, Jungian analyst and author. She is of Japanese descent. A Distinguished Life Fellow of the American Psychiatric Association and a Diplomate of the American Board of Psychiatry and Neurology, she is an emeritus clinical professor of psychiatry at Langley Porter Psychiatric Institute, UCSF Medical Center and member of the C.G. Jung Institute of San Francisco. She is the author of thirteen books in over one hundred foreign editions. She was an NGO delegate to the United Nations Commission on the Status of Women (2002-2018).