His Vici project, on which some five researchers are working, is on monitoring pronunciation. Schiller: 'All speakers also listen to themselves. So you can correct yourself as soon as you hear what you have said. But sometimes we correct language mistakes even before we have spoken them. Then it's our internal monitor at work. In the Vici project, we want to find out how you can separate this internal and external monitor, on the basis of underlying neurocognitive processes.'