Twenty-four hundred years ago, scientists and philosophers, most notably Hippocrates,  began to recognize differences in behavior that seemed to follow a pattern. This pattern was explored by many psychologists and scientists until it was defined by William Marston. After earning his doctorate from Harvard University, he wrote The Emotions of Normal People in 1928. From this breakthrough work, he developed the lie detector test that is still in use today.

This Personality Insights Style Analysis has been developed based on the continuing improvement and validation of style analysis over the last fifty years. We are pleased to offer you this Style Analysis, which has an average of 90% face validity from its statistical validation study.  We believe it is the most accurate Style Analysis available today.