I am working on a project that uses EEG signals of the brain to identify emotional states. While surveying the literature, I came across several references where "derived features of bispectrum" are used as features for the purpose of classifying motor and emotional signals.
Although I have a list of these "derived features" at my disposal, I would like to have some intuition as to which of these features I should use and why consider a bispectrum in the first place. I would highly appreciate it if the physical significance of the bispectrum could be explained in relation to EEG signals.
What is EEG bispectrum?