Additional Study Information: This outpatient study will examine whether there is a relationship between non-fatal opioid overdose and cognitive functioning (memory, planning, organization, etc.). This research will also study the impact of a computer-based working memory program on cognition, quality of life, well-being and other important outcomes. Those who are eligible after 2-3 visits will start a 1-month long cognitive training program that can be done from their home computer, tablet or smart phone. Participants will be asked to return for follow up after they finish training, and again 1-month and 3-months later.Pre-screening survey can be completed at: https://redcap.link/lbl3fg0p