Effectiveness of Cognitive Analytic Therapy for Mixed Anxiety and Depression in the Context of Borderline Traits: A Quasi-Experimental Single Case Design Evaluation

Abstract The evidence base for the use of cognitive analytic therapy (CAT) as a short-term, integrative and relational psychotherapy for anxiety and depression is building. This study contributes by intensively studying change in two types of quantitative outcomes (ideographic and nomothetic) over treatment time. The study employed an A/B quasi experimental single case design method with a 25-year old male patient with a diagnosis of mixed anxiety and depression in the context of borderline personality disorder (BPD) traits.