Thomas Erikson is the author of Surrounded by Idiots, a book that simplifies four basic personality types using a coloring system and a two-by-two matrix.In this conversation, we address:the difference between the four letters in DISC and the colorsthe purpose and role of personality assessments in the workplacethe validity and reliability of such assessmentsthe three parts of the human mindSome people believe personality assessments are bogus. Others live and swear by them. Regardless of where you are on this spectrum, we address the questions you have about any type of personality assessment.