In his distraction-conflict theory, Robert Baron proposed that the level of performance on a task is predicted by the amount of distractions in the environment surrounding the task. The theory states distraction can be a source of social facilitation on simple tasks, as it can cause attentional conflict that can increase motivation which increases the drive proposed by Zajonc. On more complex and difficult tasks, however, the increase in drive is not enough to counteract the detrimental effects of distraction and therefore results in impaired performance.