The program uses a concept the Parellis call “horsenality” to explain the behavior of individual horses. The system is based on a model originally conceived by Linda Parelli but which was subjected to independent research by psychometric personality research specialists and that was overseen by statisticians at the Department of Education at the University of Kansas. Research consisted of assessing how experienced "horse" people in general view the differences in horses. Responses were subjected to the statistical process of factor analysis and two primary factors were derived. These orthogonal (opposite) factors were presented in a quadrant configuration labeled LBI, LBE, RBI, and RBE. There are many variants and overlapping grey zones that allow for more specific descriptions of horses. Again these are based on how humans view horses and therefore tend to approach them. The goal is to provide a positive language for perceiving horses and use this terminology to link to recommended natural training approaches.