Proceedings of the First Asian Conference on Information Systems
Asian Conference on Information Systems edition:1 location:Siem Reap, Cambodja date:6-8 December 2012
In many experimental paradigms of electroencephalography (EEG), timing accuracy in presenting experimental stimuli as
visualized on a computer screen is of importance. This paper describes a software package enabling students and researchers to easily set up suitable visual stimulation sequences for simple experiment. We describe the mechanisms employed by the software to achieve good timing accuracy on a common laptop, running Microsoft Windows. With a light sensor, the synchronization of the visual stimulation and the EEG hardware is evaluated. The results demonstrate a maximum variance of 2ms between the synchronization
marker send to the EEG hardware and the presentation of the stimulus on screen. We also confirm the software’s ability to display a flickering stimulus, used in steady-state visual evoked potential (SSVEP) experiments, with a precise frequency.