What is Discriminant Analysis”?
Discriminant analysis refers to the established multivariate statistical technique whereby a multiplicity of gathered data (multiple variables) are combined into a single number (the discriminant function) in such a way that this new variable (the discriminant) maximally separates two patient populations. John, Duffy, and Thatcher have all demonstrated that when discriminant analysis is applied to QEEG data, resulting discriminant functions are accurate in classifying individual subjects into clinically relevant diagnostic groups (e.g., head injured or not, dyslexia or not, bipolar vs. monopolar depression, etc). Such discriminants are more widely used for psychiatric than neurologic issues. What is “Epileptic Source Analysis”? A major goal in the neurophysiologic investigation of patients with epilepsy is to locate the epileptic focus. This involves determining where inside the three dimensional brain, the abnormal signals are generated using only data gathered from the intact scalp.
