Inclusion Criteria:  Meet DSM-5 criteria for current IED, as assessed via phone screen and confirmed during an in-person diagnostic interview conducted during visit one of the study Are able and willing to cooperate with study protocol; i.e. keep appointments, read and understand consent form, etc. Have written and verbal English proficiency for understanding consent and study materials  Exclusion Criteria:  Have a lifetime history of psychosis Have current moderate to severe substance use disorder Have a history of bipolar disorder Have current major depressive disorder Are younger than 18 or older than 55 years old Are currently (past month) receiving treatment for anger or aggression Recently (past month) started or changed psychotropic medications