American Psychological Association declares support for `` full marriage equality '' APA : The American Psychiatric Association, the largest professional organization in psychiatry, has issued a statement supporting same-sex marriage. `` We knew that marriage benefits heterosexual people in very significant ways , but we did n't know if that would be true for same-sex couples , '' said Anderson , who is also director of the APA 's Office on Lesbian , Gay , Bisexual and Transgender Concerns . Traditional marriage advocacy group 's chair says there 's `` no evidence '' for findings .
American Psychological Association declares support for `` full marriage equality '' APA : The American Psychiatric Association, the largest professional organization in psychiatry, has issued a statement supporting same-sex marriage. Traditional marriage advocacy group 's chair says there 's `` no evidence '' for findings .