How could one investigate if the use of dialectical behavior therapy (DBT) is effective in reducing self-harm behaviors in individuals diagnosed with borderline personality disorder (BPD)? A correlational study examining whether higher engagement in DBT relates to decreased rates of self-harming behaviors among BPD patients. Organizing a controlled trial where BPD patients are randomly assigned to receive either DBT or standard psychiatric care, while tracking incidence of self-harm actions over time. Longitudinal observational study monitoring the progression of self-harm tendencies in BPD individuals without any intervention, focusing on those who voluntarily choose to engage in DBT. Qualitative interviews with BPD patients about their experiences with DBT and feelings related to self-harm.