In the first part of the work, the time course of the interference was explored using a psychological refractory period (PRP) paradigm. Furthermore, it was investigated whether the interference also occurred across different response modalities, indicating interference at the level abstract action representations. In the second part of the work, the functional locus of the interference was further investigated. To disentangle whether interference occurred during response selection or during processes later than response selection (e.g., motor processes or monitoring processes), a change-signal paradigm and a response-grouping paradigm were applied. On the basis of the results, a possible mechanism of action recoding is suggested. It is concluded that the task specificity of action representations should be considered when investigating the mechanisms of action control in humans.