Gamified Cognitive Therapy for Obsessive Compulsive Disorder

Inclusion Criteria: * Age 18 years or older * Primary diagnosis of obsessive-compulsive disorder (OCD), confirmed by a licensed clinician using the Structured Clinical Interview for DSM-5 (SCID-5) * No current suicidal ideation or psychotic symptoms * Access to the internet and a mobile phone * Stable psychiatric medication use for at least one month prior to enrollment, with no changes in dosage during the 4-week intervention period * No current neurological or medical condition that would interfere with participation * Ability to perceive colored visual stimuli (e.g., no color blindness) * Not currently enrolled in another intervention-based study * Not receiving any other form of psychological treatment at the time of participation Exclusion Criteria: * Presence of active suicidal ideation or psychotic symptoms * Unstable psychiatric medication use (e.g., recent dose change within the past month or expected change during the intervention period) * Significant neurological or medical illness that may interfere with participation * Visual impairments that would prevent accurate perception of colored stimuli (e.g., color blindness) * Current participation in another clinical trial involving psychological intervention * Receiving concurrent psychotherapy or other psychological treatments outside of the study