Clinical trials

The goal of this clinical trial is to learn how adding brain stimulation to a brief counseling session affects adults with cannabis use disorder. The counseling session uses motivational interviewing, which helps people talk through their reasons for changing or not changing cannabis use. The brain stimulation is called transcranial alternating current stimulation (tACS). tACS uses electrodes on the scalp to give a very weak electrical current for a short time. The main questions it aims to answer are: * Does active tACS affect what participants say during the counseling session? * Does active tACS change brain activity after the session? * Is active tACS related to less cannabis use during the month after the session? Researchers will compare motivational interviewing with active tACS to motivational interviewing with placebo stimulation. Placebo stimulation uses the same setup but does not provide the active 30-minute stimulation. Participants will be assigned by chance to one of these groups, and neither participants nor the study staff member running the session will know which type of stimulation is used. Participants will complete questionnaires, breath and urine tests, a recorded counseling session during active or placebo stimulation, MEG and MRI brain scans, daily text-message check-ins about cannabis use, and follow-up questionnaires about one month later.

The goal of this clinical trial is to investigate the effect of two types of cognitive remediation training on real-world behavioral outcomes including substance use, institutional adjustment, and recidivism following release from prison. Each training type is designed to target one of two subtypes of antisocial criminal offenders, who are characterized by either: 1) Attention to context-based deficits, or 2) Affective cognitive control-based deficits. The main questions it aims to answer are: Does matching deficit type with targeted cognitive training improve outcomes (relative to mismatched training)? What are the functional brain mechanisms that underlie treatment change? Participants will: Be assigned to cognitive training that either does or does not match their deficit type. Complete six one-hour sessions of cognitive skills training. Complete pre and post-training behavioral tasks assessing self-regulation deficits. Complete structural MRI scans and functional MRI scans assessing cognitive control. Complete post-treatment follow-up assessments evaluating self-regulation, adjustment, and stressful life events, substance use and recidivism.

The goal of this clinical trial is to examine if music training improves behavioral or cognitive performance in children with prenatal alcohol exposure who meet research criteria for a fetal alcohol spectrum disorder. The main questions it aims to answer are: * Does music training improve behavioral regulation for children with an FASD * Does music training improve cognitive performance (attention and working memory) for children with an FASD. The study has two interventions for each participant: music listening and piano training. Each participant will either practice piano daily for 12 weeks or listen to pre-selected music daily for 12 weeks. The order of the interventions will be randomized across participants. Assessment will occur before and after participation in each 12 week intervention.

The goal of this small (n=75) proof-of-concept randomized clinical trial is to test the effects of transcranial alternating current stimulation (tACS) during motivational interviewing (MI) sessions with participants who drink at above the low-risk level. Participants will be randomized to receive either MI with active stimulation, MI with sham stimulation, or a delayed treatment group that receives MI with no stimulation. Measures will include brain imaging, alcohol use, cannabis use, risk-taking behavior, emotions, and others. Participants who are randomized to the delayed-treatment group will not receive brain imaging.

Substance use disorders and psychopathy are serious and costly mental health issues. Psychopathy is known to be associated with aberrant moral decision making and there is considerable interest in determining whether substance use disorders lead to impairments in these same cognitive processes. Recent large-scale research initiatives in forensic settings have begun to identify substance abuse and psychopathy-related disruption in the neural mechanisms involved in moral decision-making processes, and associations between these neural networks and future relapse and antisocial behavior. Here the investigators extend prior work (with incarcerated men) to examine these issues among incarcerated women in order to better understand sex differences. This project addresses the overall lack of neurocognitive research in criminal offenders with substance use disorders, thereby focusing on a major public health issue in an underserved and understudied population.