She also began publishing articles on neuropsychology. She continued to join political groups such as the Chicago Westside Group in 1967 and the New University Conference in 1969. She remained at Loyola University until 1973, but ultimately had to leave due to the institution's inability to provide her with the equipment and support necessary to continue her cognitive neuroscience research. In the mid-1970s, Weisstein and her husband Lemisch moved to Buffalo, New York, to work at the State University of New York. She continued to pursue her research in the field of cognitive neuroscience and mentored many graduate students throughout her years there. She was awarded the Guggenheim Fellowship grant in 1979. This grant is awarded to those who have displayed outstanding creativity and productive scholarships. Weisstein also wrote an article for the New Haven Women's Liberation monthly magazine, "Will The Women's Movement Survive?" Weisstein faced harassment from other faculty at the institution. This included intimidating her students, disputing her findings and sexual harassment. These incidents caused Weisstein to take a leave of absence from the university and she was later diagnosed with chronic fatigue syndrome. According to Weisstein and her husband, this was due to the constant attacks from the faculty members, however, there was no formal conclusion made. She became bedridden in 1983 due to her condition. Weisstein took an active role in studying the sexism within the field of psychology. In August 1970, along with Phyllis Chesler, Joanne Evans Gardner, and others, Weisstein founded American Women in Psychology, now Division 35 of the American Psychological Association. She focused on social psychology and how social expectations influence and confound research. She was an important figure in contributing to the feminist movement by identifying distortions and biases in psychology. Weisstein believed that psychology was prejudice towards women, in that psychologists did not respect evidence that showed men and women were equal. Weisstein stated that due to the prejudice, psychologists limit the discovery of actual human potential that women possess. Similarly, according to Weisstein, women were only looked at in terms of the social expectations of them (i.e. weaker, 'nurturer', inferior, etc.). She details more of her ideas in her article, "Psychology Constructs the Female". Her research in the field of cognitive neuroscience focused on how the brain forms perceptions. Her work showed that the brain does not passively receive information, but instead that the human mind actively assigns meaning to what it sees. This is known as the concept of parallel processing.