Brain-computer interfaces (BCI) provide an alternative communication channel that bypasses all muscular functions by directly decoding brain activity. When using electroencephalography (EEG) to acquire brain signals, they are non-invasive, affordable and safe. Having originally been designed as a communication tool for patients with severe physical disabilities, e.g. paraplegia or locked-in state, the application areas have grown in recent years. Our research follows a two fold approach. Firstly, we aim at improving the reliability and the communication speed of the systems. Furthermore, we investigate the usage of BCI as a research tool, in particular to study human-machine and human-robot interaction in more real-world like settings. To this end, BCI allows to investigate cognitive processes during the interaction, in almost real time and without having to rely solely on group-level data.
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