Aim of the empirical studies on human multitasking referred to in this contribution was to illustrate how people manage the concurrency of several tasks in a dynamic task environment, as also investigated by Salvucci (2005) or Taatgen (2005). With other words, purpose of our applied multitasking scenario in four studies including training aspects (study one), task variation (study two), time pressure (study three) and systematic task interruption (study four) was to incorporate the following aspects ecological validity, task repetition, methodological stability, and situational influences.