The Florida Obsessive-Compulsive Inventory (FOCI)<\/strong> is an empirically validated, brief self-report psychometric instrument designed to assess both the presence and the severity of obsessive-compulsive symptoms in clinical and research settings. Developed in 2007 by Eric A. Storch and colleagues at the University of Florida, the instrument addresses a critical gap in psychiatric assessment by offering an efficient alternative to lengthy clinician-administered interviews and cumbersome self-report questionnaires. The FOCI comprises two distinct, sequentially administered components totaling 25 items: a 20-item Symptom Checklist (FOCI-SC)<\/em> evaluating the lifetime or current presence of common obsessions and compulsions via a dichotomous response format (No = 0, Yes = 1), and a 5-item Symptom Severity Scale (FOCI-SS)<\/em> rating the overall clinical impact across time spent, subjective distress, functional interference, resistance efforts, and degree of control on a 5-point Likert-type scale ranging from 0 to 4<\/span>.<\/p>\n Psychometric investigations demonstrate that the FOCI possesses robust measurement properties. In clinical samples diagnosed with obsessive-compulsive disorder<\/a> (OCD) according to DSM-IV and DSM-5 criteria, the Symptom Checklist demonstrates strong internal consistency (Kuder-Richardson Formula 20, $KR\u201320 = 0.83$<\/span>), while the Severity Scale demonstrates high internal consistency (Cronbach’s $\\alpha = 0.89$<\/span> to $0.92$) and a unidimensional factor structure accounting for substantial variance. The instrument exhibits strong convergent validity through pronounced correlations with gold-standard measures such as the Yale-Brown Obsessive Compulsive Scale<\/a> Self-Report (Y-BOCS-SR) and clinician-rated Y-BOCS ($r = 0.76\u20130.84$<\/span>), moderate correlations with indices of general affective distress such as the Depression Anxiety Stress Scales (DASS) and Hamilton Depression Rating Scale (HAM-D), and excellent sensitivity to therapeutic changes resulting from cognitive-behavioral therapy (CBT) and pharmacotherapy. With an administration time under five minutes, the FOCI serves as an indispensable tool for rapid triage, broad population screening, longitudinal treatment monitoring, and specialized psychopathology research.<\/p>\n Florida Obsessive-Compulsive Inventory, FOCI, obsessive-compulsive disorder, psychometrics, symptom checklist, symptom severity, Yale-Brown Obsessive Compulsive Scale, cognitive behavioral therapy, treatment monitoring, clinical assessment<\/p>\n The Florida Obsessive-Compulsive Inventory was conceptualized, developed, and psychometrically validated by a collaborative team of clinical psychologists, psychiatrists, and behavioral scientists based at the University of Florida College of Medicine and affiliated academic medical centers:<\/p>\n The Florida Obsessive-Compulsive Inventory (FOCI) was engineered to address several persistent diagnostic and administrative challenges in the operational assessment of obsessive-compulsive disorder<\/a> (OCD). Historically, the clinician-administered Yale-Brown Obsessive Compulsive Scale<\/a> (Y-BOCS) established the empirical standard for quantifying obsessive-compulsive symptom severity. However, the semi-structured format of the Y-BOCS requires substantial clinical training, sophisticated interviewing skills, and typically between 30 and 45 minutes to administer. While a self-report adaptation (Y-BOCS-SR) was later introduced to alleviate practitioner burden, clinicians and psychometricians observed that respondents often experienced confusion regarding the structural division between obsessions and compulsions, leading to inconsistent scoring, administrative fatigue, and compromised psychometric validity.<\/p>\n The primary rationale behind the development of the FOCI was the creation of an exceptionally brief, psychometrically sound, self-administered questionnaire capable of being completed and scored in less than five minutes. The creators intended to provide a dual-utility instrument that bifurcates the clinical picture into two critical, distinct operational domains: (a) a comprehensive inventory of symptom phenomenology (the number and topical breadth of obsessions and compulsions endorsed) and (b) an aggregated measurement of pervasive functional impairment and clinical distress (overall symptom severity).<\/p>\n In routine clinical practice, the FOCI operates as a rapid screening measure in psychiatric outpatient facilities, primary care clinics, university counseling centers, and specialized behavioral health programs. By establishing an empirical cutoff on the Severity Scale (scores $ge 8$<\/span>), clinicians can swiftly detect clinically meaningful obsessive-compulsive pathology that warrants comprehensive clinical diagnostic evaluation. Furthermore, because of its brief format, the FOCI provides exceptional utility as a longitudinal tracking measure. In clinical trials and intensive outpatient or residential programs, patients can complete the FOCI weekly or session-by-session to monitor therapeutic trajectory, evaluate response to exposure and response prevention (ERP)<\/a> protocols, and assess outcomes of selective serotonin reuptake inhibitor (SSRI)<\/a> pharmacotherapy.<\/p>\n In psychiatric research, the FOCI fulfills the demand for low-burden, scalable phenotyping across large epidemiological cohorts, digital mental health interventions, and neuroimaging studies where testing time is strictly limited. By decoupling the count of diverse symptom manifestations from the global level of functional impairment, researchers can independently analyze the determinants of phenomenological diversity versus clinical disability.<\/p>\nKeywords<\/h2>\n
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