It is well known that the capacity for both simultaneous and rapid sequential information processing is limited. In the past two decades, at least four different approaches for the investigation and explanation of dual-task interference have developed. Surprisingly, these developments have taken place largely independent of each other. For example, working memory theories explain the inability to memorize combinations of data with the existence of modality-specific memory storage. Task switching models attribute switch costs to a combination of task reconfiguration costs and interference...