Interest Groups Interest Group is defined as "an organized body of individuals who try to influence public policy." This system is designed so that interest groups would be an instrument of public influence on politics to create changes, but would not threaten the government much. Whether this is still the case or not is an important question that we must find out. Interest groups play many different roles in the American political system, such as representation, participation, education, and program monitoring. Representation is the function that we see most often and the function we automatically think of when we think of interest groups. Participation is ano