Conclusion
The combination of a P300 and SSVEP based BCI allows realizing both i) a synchronous goal orientated control system using the P300 interface satisfying the intention of the user more naturally, e.g. sending the command grasp a glass of water; here one can select a command from a large command base and ii) a reliable asynchronous more direct control of devices based on a SSVEP interface; here just a few commands can be selected with very good performance including zero-class detection.