Director of the Behavioral Genetics Unit at Evanston Northwestern Healthcare Research Institute
Not Clearly Pro or Con to the question "Is Sexual Orientation Determined at Birth?"
Told ProCon.org in a Apr. 26, 2005 phone interview that he and most contemporary researchers believe that sexual orientation - the general disposition of people toward homosexuality, bisexuality, or heterosexuality - is the result of both biological factors and psychological experiences. Most researchers do not believe that sexual orientation is result of nature (biology, including genetics) alone or nurture (environment) alone.
Dr. Sanders asked ProCon.org in an Apr. 29, 2005 email to use this statement for his position