Description: This poster discusses research on the difficulty of assessing female psychopathy. Abstract: If the average person is asked to name a female psychopath from a movie, s/he might name Charlize Theron's portrayal of Aileen Wuornos from 'Monster' or Glenn Close as Alex from 'Fatal Attractions', but s/he would be only half-right. Aileen Wuornos was clearly a psychopath; Glenn Close's character displayed Borderline Personality Disorder (BPD). Similarities between psychopathy and BDP, particularly in presentation of BPD (i.e. mood swings or affect) at the time of assessment can be confusing. Male psychopathy assessment is more precise while the female assessment seems ambiguous and indistinct. An in-depth literature review of the personality disturbances and the different psychopathy scales, such as Hare's Psychopathy Checklist-Revised (PCL-R), will be beneficial in discerning why female psychopathy is often misdiagnosed.