According to North Korean documents and refugee testimonies, all North Koreans are sorted into groups according to their Songbun, an ascribed status system based on a citizen's assessed loyalty to the government. Based on their own behavior and the political, social, and economic background of their family for three generations as well as behavior by relatives within that range, Songbun is allegedly used to determine whether an individual is trusted with responsibility, given opportunities, or even receives adequate food.