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Methodological context for: Livingston KE (1953). Cingulate cortex isolation for the treatment of psychoses and psychoneuroses. Res Publ Assoc Nerv Ment Dis 31:374-8. Cingulate cortex isolation for the treatment of psychoses and psychoneuroses. Res Publ Assoc Nerv Ment Dis 31:374-8.

Observer bias

Differences in the way treatment outcomes are assessed