## Brain-Computer Interfaces, Kullback-Leibler, and Mutual Information: Case Study #1

Brain-Computer Interfaces, Kullback-Leibler, and Mutual Information: Case Study #1 In the previous blogpost, I introduced the Kullback-Leibler divergence as an essential information-theoretic tool for researchers, designers, and practitioners interested in not just Brain-Computer Interfaces (BCIs), but specifically in Brain-Computer Information Interfaces (BCIIs). The notion of Mutual Information (MI) is also fundamental to information theory, and it can be expressed in terms of the Kullback-Leibler divergence. Mutual Information is given as: Mutual Information Notation I(x,y) is the mutual information of two…