1. Department of Psychophysiology, Kazimierz Wielki University, PL 85-837 Bydgoszcz, Poland
2. Department of Psychology, University of Leipzig, D 04009 Leipzig, Germany
3. Department of Psychology, University of Bamberg, Markusplatz 3, D 96045 Bamberg, Germany
4. Laboratory for Perceptual Dynamics, Brain Science Institute, Riken, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
5. Department of Neurology, University of Lübeck, D 23538 Lübeck, Germany
6. Department of Psychology, University of Finance and Management, Pawia 55, PL 01030 Warsaw, Poland