The PREP, People Reading Effectiveness Program, came about in 1984 when founder JoAn Mann saw the need for a research-driven personality profile to help with her business and career coaching clients across the United States, Europe and Canada. She wanted a profile based on strengths so people would then pay attention to their less developed areas. After working with other assessments and finding them lengthy, hard to understand, and not able to function across different cultures, JoAn decided to create her own assessment.
JoAn used her background in human resources, teaching, foreign languages, and statistical research along with partnering with medical practitioners, statisticians, psychologists, business experts, and investors in order to create the assessment.