Thomas Eriksson is a behavioral science researcher and communication expert. He developed the DISC model, a method for assessing personality types.
According to Erikson's method, people can be divided into different types according to a key of four main colors. Reds are dominant and ambitious, yellows are sociable and optimistic, greens are stable and kind, and blues are analytical and cautious. His book "Surrounded by Bad Bosses (and Lazy Employees)" was recently published in Hebrew translation (Kinneret Zamora Publishing)