摘要: Obtaining an accurate diagnosis of obsessive-compulsive and/or related disorder is complicated by many factors. These factors include (1) symptom overlap and high comorbidity with numerous other mental health diagnoses, (2) extremely diverse presentation content across individuals, (3) potential lack insight the individual into their symptoms role, (4) for stigma or embarrassment surrounding certain thoughts behaviors that commonly occur. can prevent reporting (for review, see Moulding, Hughes, Byrne, Do, & Nedeljkovic, 2016). Perhaps due to these diagnostic complications, there are discrepancies in literature regarding prevalence incidence OCD Fontenelle, Mendlowicz, Versiani, 2006). An effective interview one which interviewer capable probing specific questions differentiate form function symptoms, while also fostering environment feels safe disclose may be controversial irrational nature. Given disorders often under-recognized misdiagnosed, it critical clinicians informed best assessment practices purposes, settings, individuals. This chapter provides overview disorders, recommendations both formal informal interviewing assessment, tips attaining necessary information make diagnosis. Additionally, we describe several cases as examples how engage array presentations.