Timeline of EverythingDisc
1970s - First DiSC assessment: Personal Profile System® (PPS)
In the 1970s, John Geier, a faculty member in the University of Minnesota’s Department of Health Sciences, used Self Discription to create the original Personal Profile System® (PPS). He formed a company called Performax (which eventually became Inscape Publishing and is now the Workplace Learning Solutions Group at Wiley) that was the first publisher of a DiSC assessment. Since the PPS used the same 24 tetrads and items that appeared in the original Self Discription, Geier’s main contribution was not so much in the area of instrument development, but in furthering the understanding of the 15 basic patterns discovered by Clarke. Geier collected pattern descriptions through clinical interviews with hundreds of people. By extracting behavioral information from those interviews, he provided richer descriptions of these 15 patterns that had come to be known as the Classical Profile Patterns.