Improving Attentional and Cognitive Control in the Psychological Treatment of Intrusive Thoughts

Inclusion Criteria: * Adults ages 18-60 years old * Right-handed * Living in Massachusetts * Repetitive Negative Thinking (RNT) in the form of mental rituals, worries, and/or depressive ruminations is the primary reason for seeking treatment * RNT significant enough to warrant intervention * Fluent in English, willing to provide informed consent, and willing to comply with the study protocol * Access to a device with an internet connection, camera, and microphone (e.g., computer, smart phone, tablet) * Comfortable and capable of using a computer and completing reaction-time tasks Exclusion Criteria: * History of head injury or neurologic disease, mental retardation, or borderline intellectual functioning that would interfere with ability to participate in the study. * Impaired (or uncorrected) vision, medical illness, or medical treatment that would interfere with participation. * Active suicidal or homicidal ideation or any features requiring a higher level of care. * Lifetime psychotic disorder or bipolar disorder * Substance or alcohol use disorder that would interfere with treatment. * Current Attention Deficit Hyperactivity Disorder (ADHD) that would interfere with attentional tasks. * Unstable dose of psychotropic medications or recent discontinuation of psychotropic medication. * Current psychotherapy or plans to initiate such treatment during the study. * Previous course of treatment with cognitive behavioral therapy and/or mindfulness/meditation for obsessive comp…