those phenomena and effects that affect the political bias of political subjects:
1) Political and value identity of a person (as the bias increases, more and more information is associated with self-identification).
2) Previous experience and socialization, for example, the influence of family and group on the formation of political attitudes.
3) Emotions related to politics, such as fear or anger, which affect the perception of information.
4) Media and communication environments that support bias through repetitive frames and content consistent with existing attitudes.