Research has recently addressed concerns about the potential for media exposure to cause attention problems and hyperactivity. A cross-sectional study of 211 undergraduate students examined behaviors and characteristics associated with exposure to television, films, and video games. Greater media exposure was associated with more attention problems and hyperactivity based on self-reported symptoms and past attention disorder diagnosis. Exposure to screen media was also associated with poorer school performance and greater aggression, possibly mediated by attention problems and hyperactivity. Two computerized performance tasks, the IVA Continuous Performance Test and the Eriksen Flanker Task, were generally unrelated to media exposure and other measures of attention problems and hyperactivity, suggesting the involvement of different aspects of attention in performance on these tasks.