A Comparative Study on the Effect of Audio and Visual Stimuli for Enhancing Attention and Memory in Brain Computer Interface System

Brain-Computer Interface (BCI) is an alternative communication and control channel between brain and computer which finds applications in neuroprosthetics, brain wave controlled computer games, etc. This paper presents a comparative study on the effects of audio and visual modalities of input stimuli in enhancing the memory and attention level of a person. The proposed game requires the player to memorize a sequence of objects and then correctly select them in the order of their appearance for the different modalities of stimuli, separately. It also enables the player to control the game using attention based brain signals. The attention level of a person is quantified using a modified form of sample entropy feature of Electroencephalogram (EEG). Previous studies have already shown the effectiveness of visual modality for enhancing cognitive skills of person. This paper aims to show the relative effectiveness of the audio stimuli in enhancing the attention and memory of a person.