This study aims to examine the utility of Emotion Regulation Training (ERT) in reducing symptoms of anxiety and/or depression in young adults aged 18 to 29 years old. Additionally, we are interested in assessing neural, cardiac, and immunological changes associated with psychological symptom reduction in these individuals. Lastly, we are interested in examining whether an abbreviated 8-session version of ERT produces similar results to a longer (16-session) version of ERT.