Adler's major criterion for psychological health is

• A. independence
• B. social interest
• C. ambition
• D. equanimity

Answer: (B)

Health in Adler's theory is judged by social interest—a genuine concern for others and a sense of belonging within the community. This Gemein­schaftsgefühl means using one's abilities to contribute to the welfare of others and to participate cooperatively in social life. When a person shows this sense of connection and service, they tend to function adaptively and experience healthier psychological adjustment. Independence, while useful, isn’t the measure of health in Adler’s view, and ambition focuses on personal striving rather than communal welfare. Equanimity matters, but without social interest, it doesn’t capture Adler’s idea of mental health. So, social interest best captures Adler’s criterion for psychological health.