Investigating a Gaze-Tracking Brain Computer Interface Concept Using Steady State Visually Evoked Potentials

摘要: This project investigated the possibility of a user's gaze being tracked within area computer monitor bounded by multiple light sources, each stimulating an SSVEP. If realised, such system would allow spatial arrangement interactive elements around screen, rather than discrete list commands accessible through existing SSVEP based BCIs. Research-level EEG equipment make proposed BCI prohibitively expensive for home users. Thus, investigation was made into utility inexpensive consumer-grade equipment, as is available computer-gaming. SSVEPs were elicited using initially traditional strobe source and then set individual LEDs, necessary simultaneous stimulation SSVEPs. Clear responses recorded research both LED sources; however consumer lacked sufficient sensitivity to reliably detect Tests with two LEDs showed that differing frequencies be resolved simultaneously, amplitude response decreases directed further from source. Further work will aim derive location relative amplitudes