Background: People living with borderline personality disorder (BPD) face high levels of prejudice and discrimination from both the community and medical professionals, but no measure of prejudice toward people living with BPD exists.
Aims: The current study aimed to adapt an existing Prejudice toward People with Mental Illness (PPMI) scale and investigate the structure and nomological network of prejudice toward people with BPD.
Methods: The original 28-item PPMI scale was adapted to create the Prejudice toward People with Borderline Personality Disorder (PPBPD) scale. The scale and related measures were completed by three samples: 217 medical or clinical psychology students, 303 psychology undergraduate students, and 314 adults from the general population.
Results: The original four-factor structure of the PPMI was supported in the PPBPD scale. Reported prejudice toward people with BPD was more negative than prejudice toward people with mental illness in general. The association of the PPBPD scale with antecedents and consequences was assessed, including social dominance orientation, right-wing authoritarianism, ethnocentrism, personality traits, empathy, prior contact, and feelings toward other stigmatized groups and mental illnesses.
Conclusions: This study provided evidence for the validity and psychometric properties of the PPBPD scale across three samples and investigated anticipated relationships with theoretically related antecedents and consequences. This research will help improve understanding of the expressions underlying prejudice toward people with BPD.
Keywords: Prejudice; borderline personality disorder; scale construction; stigma.