Inlfuence of visual angle on performance in Noise-Tag BCI.

Abstract

The in uence of changing the visual angle on the performance of a new method used for Brain Computer Interfaces (BCI), namely Noise-Tag was investigated. This was done by varying the distance between the subject and the stimuli. Accuracy and speed were compared and the data was processed with an repeated measures ANOVA. Visual angle had a clear and signi cant (p-value is .0006) e ect on accuracy. A smaller visual angle resulted in worse accuracy. Barely any e ect (p-value is .6551) was found on the speed. Furthermore training on di erent visual angles was tested resulting in a signi cant e ect (p-value is .0114). Training on smaller visual angles resulted in worse accuracy.