-
Hypodermic needle / magic bullet theory: media directly and uniformly inject messages into passive audiences with powerful effects. It was influenced by propaganda concerns of the 1920s to 1930s and the panic after the 1938 War of the Worlds radio broadcast. It is now considered simplistic.
-
Two-step flow theory (Lazarsfeld, Berelson and Gaudet, 1944; developed by Katz and Lazarsfeld, 1955): media messages reach opinion leaders first, who then influence others. It emphasises personal influence over direct media effect.
-
Uses and gratifications theory (Katz, Blumler and Gurevitch, 1974): audiences are active and use media to satisfy needs (information, entertainment, social interaction, identity, escape). The question moves from "what does media do to people?" to "what do people do with media?"
-
Agenda-setting theory (McCombs and Shaw, 1972): media may not tell people what to think but tell them what to think about (issue salience).
-
Cultivation theory (George Gerbner): long-term heavy exposure to television shapes viewers' perception of reality; related to the "mean world syndrome".
-
Spiral of silence (Elisabeth Noelle-Neumann, 1974): people hesitate to express opinions they believe are in the minority for fear of isolation, and the dominant opinion appears stronger.
-
Gatekeeping theory (Kurt Lewin; David Manning White's "Mr. Gates" study, 1950): editors and others decide which news passes through.
-
Media dependency theory (Ball-Rokeach and DeFleur, 1976): the more a person depends on media to meet needs, the more influence media has on them.
-
Knowledge gap hypothesis (Tichenor, Donohue and Olien, 1970): groups with higher socio-economic status gain information from mass media faster, widening the gap.
-
Diffusion of innovations (Everett Rogers): adopters categorised as innovators (2.5%), early adopters (13.5%), early majority (34%), late majority (34%) and laggards (16%).
-
Framing theory (Goffman; Entman): how an issue is presented influences how audiences interpret it.
-
Marshall McLuhan: "The medium is the message"; the concept of the global village; Understanding Media (1964). Hot media (high definition, low participation, e.g., radio, film, print) vs cool media (low definition, high participation, e.g., television, telephone).
-
Propaganda model (Herman and Chomsky, Manufacturing Consent, 1988): news is filtered by ownership, advertising, sourcing, flak and a common ideology.
-
Frankfurt School (Adorno and Horkheimer): the culture industry critique.
-
Habermas: the public sphere.