Duke University Dorothy Riddle (born January 12, 1944) is an American-Canadian psychologist, feminist and economic development specialist.

[1] With the establishment of the People's Republic of China on October 1, 1949, foreigners were forced to leave the country and the family moved to India as refugees.

[1] The early experience of poverty and social issues in China and India came to influence much of Riddle's studies and professional career in later years.

[2] Dorothy Riddle's professional career has concentrated on the issues of feminism and women's studies, homosexuality and homophobia, and on services and economic development, focusing on the initiatives that empower disadvantaged groups and economies.

[1][9] In parallel with her work on the APA Task Force on the Status of Lesbian and Gay Male Psychologists, Riddle developed a scale for measuring homophobia while a professor in the Psychology Department of the University of Arizona.

[10] The tool became known as the Riddle homophobia scale and was adopted by many organizations in anti-discriminatory training and for measuring changes in a range of other social attitudes as well.