The ERP study investigates the differences in the ability to control inhibition in patients with suicide ideation and patients who have attempted suicide. Participants were recruited from the internal medicine department of Soonchunyang University Cheonan Hospital in South Korea after undergoing treatment following a suicide attempt or through a psychiatric interview following suicidal ideation. All patients within the sample have no history of psychotic disorders, intellectual disabilities, neurological or severe medical cases, a history of alcohol or substance abuse, head trauma, or an ongoing pregnancy. This resulted in 150 participants at baseline, divided into 76 suicide ideators with an average age of 39.38 years and 60.6% female, and 74 suicide attempters with an average age of 41.53 years and 58.1% female.