This is a definitive, randomized controlled trial that will measure the efficacy of Resilience Training, a four-session group-based behavioral intervention conducted in transdiagnostically at-risk young adults who have psychotic experiences. The primary goal is to determine whether Resilience Training is superior to a time-matched active control condition, Life Skills Training, in reducing transdiagnostic symptoms of psychopathology, such as psychotic experiences, and improving long-term psychiatric (preventing the onset of psychiatric diagnoses) and functional (improving academic performance and retention in college) outcomes in this at-risk population. In addition, a proposed model of the mechanisms of action of RT, involving reducing emotion reactivity and changes in hippocampal function and connectivity, will be assessed.