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'''Scientific bias''' is the assumption that a theory is true or false without evidence one way or another, or the attempt to dismiss or discourage research efforts to confirm or deny the theory - often on political or ideological grounds.

'''Scientific bias''' is the assumption that a theory is true or false without evidence one way or another, or the attempt to dismiss or discourage research efforts to confirm or deny the theory - often on political or ideological grounds.

The American Psychological Association, for example, opposes [[reparative therapy]] for [[homosexuals]] (even if they volunteer for it, although they themselves acknowledge that there's no proof it does any harm:

The American Psychological Association, for example, opposes [[reparative therapy]] for [[homosexuals]] (even if they volunteer for it), although they themselves acknowledge that there's no proof it does any harm:

* ... there are no scientifically rigorous outcome studies to determine either the actual efficacy or harm of "reparative" treatments. [http://www.aglp.org/pages/position.html#Anchor-55000 Association of Gay and Lesbian Psychiatrists]

* ... there are no scientifically rigorous outcome studies to determine either the actual efficacy or harm of "reparative" treatments. [http://www.aglp.org/pages/position.html#Anchor-55000 Association of Gay and Lesbian Psychiatrists]