This is a multi-site study to examine error-related brain activity (i.e., the error-related negativity) and anxiety symptoms in 11 to 14 year-olds (N=600) at two time points separated by two years. The study examines the degree to which error-related negativity can predict anxiety prospectively over two years, and whether a computerized game that alters attention to threat can alter error-related negativity and trajectories of anxiety.