The Entropy Design Packages

The entropy design package includes designs that use nonlinear and nonparametric measures of the EEG
These designs use spectral entropy and interquartile/interquantile range as the values to be trained. Although these designs use different measures they have a similar effect on the eeg.

The Entropy design packages include 2 and 4 channel designs and are
PhotoStim Capable.

More information and images.

Interquartile Range