Introduction - If you have any usage issues, please Google them yourself
CHAID :(Chi-square Automatic Interaction Detector (or Detection, depending upon the source consulted),
is an exploratory method used to study the relationship between a dependent variable and a series of predictor variables. CHAID modeling selects a set of predictors and their interactions that optimally predict the dependent measure. The developed model is a classification tree (or data partitioning tree) that shows how major "types" formed from the independent (predictor or splitter) variables differentially predict a criterion or dependent variable.