Online Metacognitive Training for OCD (MCT-OCD): a Randomized Controlled Trial

INTERVENTION: Group 1: Interventional = Online‐Delivered Metacognitive Training for Obsessive‐Compulsive Disorder (MCT‐OCD), 8 sessions (approximately 90min per session), once a week over a period of 8 weeks. The aim of MCT‐OCD is to reduce OC symptoms through the modification of OCD‐specific cognitive biases. In addition to those biases conventionally treated in CBT, it addresses further biases that basic research has identified (e.g., biased cognitive networks). Group 2: Waitlist control = Participants assigned to the waitlist control received no structured psychological treatment during the equivalent 8‐week observation period. Participants are informed that they receive access to the active intervention following completion of the waitlist period. CONDITION: ; F42 Obsessive‐compulsive disorder PRIMARY OUTCOME: Self report version of the Yale‐Brown Obsessive Compulsive Scale Second‐Edition (Y‐BOCS‐II‐SR): A self‐report assessment for OCD symptoms (t0, t1, and t2). INCLUSION CRITERIA: • A prior clinical diagnosis of obsessive‐compulsive disorder (OCD) made by a psychologist or psychiatrist, OR in the absence of a formal diagnosis – a score of = 16 on the Self‐Report version of the Yale‐Brown Obsessive Compulsive Scale, Second Edition (Y‐BOCS‐II‐SR; Pinciotti et al., 2024) at baseline. • consent to participate in the Online MCT‐OCD • consent to participate in the study (informed consent, provided via an online form) • sufficient understanding of the Indonesian language (Bahasa Indonesia) • suitable for group therapy (agreement to comply with the group rules governing the intervention sessions, such as not to insult others or interrupt within session process) SECONDARY OUTCOME: Obsessive Compulsive Inventory‐ Revised (OCI‐R): The OCI‐R is a self‐rating questionnaire that assesses OCD symptom severity (t0, t1, and t2) ; ; Obsessive‐Beliefs‐Questionnaire (OBQ‐20): The OBQ‐20 is a self‐rating questionnaire that assesses OCD relevant dysfunctional beliefs (t0, t1, and t2) ; ; Meta‐cognitions Questionnaire (MCQ‐30): The MCQ‐30 is a self‐report questionnaire assessing dysfunctional metacognitive beliefs (t0, t1, and t2). ; ; Patient Health Questionnaire ‐ 9 (PHQ‐9): The PHQ‐9 is a self‐rating questionnaire to measure depressive symptoms (t0, t1, and t2). ; ; Generalized Anxiety Disorder ‐ 7 (GAD‐7): The GAD‐7 is a self‐rating questionnaire to measure generalized anxiety symptoms (t0, t1, and t2). ; ; Treatment Expectation Questionnaire (TEX‐Q): The TEX‐Q is a self‐rating questionnaire to measure expectation for upcoming medical or psychological treatment (t0 only) ; ; Maladaptive and Adaptive Coping Styles (MAX): The MA Xis a self‐rating questionnaire to measure coping style (t0, t1, and t2) ; ; Alienation from Religion Scale (AFRS): The AFRS is a self‐rating questionnaire to measure perceived alienation from religion (t0 only) ; ; Intention Shift Scale (ISS): The ISS is a self‐rating questionnaire to measure perceived intention shift after underwent a therapy (t1 and t2) ; ; MCT‐OCD Knowledge Scale: This measure is a self‐rating questionnaire to evaluate the knowledge of participants regarding metacognitions and OCD (t0, t1, and t2) ; ; Subjective Appraisal Rating of the MCT‐OCD. This measure is a self‐rating questionnaire to evaluate the participants’ appraisal of the MCT‐OCD. ; ; Client Satisfaction Questionnaire ‐ 8 (CSQ‐8): The CSQ‐8 is a self‐rating questionnaire to measure client’s satisfaction with received treatment (t1 and t2) ; ; MCT‐OCD Session Effect Scale: After each session of the MCT‐OCD, participants receive questionnaire in which evaluate cognitive biases that correspond to the content of the MCT‐OCD modules as well as general mechanisms of change such as coping expectation, agency, perceived control, psychological flexibility, insight, and distress tolerance.