Agenda-Setting Theory

framework · political science · organizing-schema

Media doesn't tell us what to think but powerfully shapes what to think about.

Agenda-Setting Theory is the framework articulating the media's substantial power to shape public attention by determining which issues receive coverage and prominence, captured in Bernard Cohen's foundational 1963 formulation: the press 'may not be successful much of the time in telling people what to think, but it is stunningly successful in telling its readers what to think about.' The theory was substantially formalized through Maxwell McCombs and Donald Shaw's 1972 study of the 1968 US presidential election in Chapel Hill, North Carolina, which demonstrated strong correlation between media coverage emphasis and voters' perceived importance of issues — the foundational 'Chapel Hill Study' (Public Opinion Quarterly). The theory distinguishes first-level agenda setting (which issues are on the agenda) from second-level agenda setting (which attributes of issues are emphasized — also called 'attribute agenda setting' and overlapping with framing theory). Subsequent development includes priming (media-emphasized issues become criteria for political evaluation), framing (how issues are presented affects interpretation), agenda building (how various actors influence what gets onto the media agenda), and the third-level or 'network agenda setting' (relationships among issues and attributes). Agenda-setting theory has had enormous influence on political communication research and is foundational to contemporary understanding of media-politics relationships. The theory has substantial empirical support across decades of research, though contemporary fragmented and personalized media environments (social media, algorithmic feeds, partisan media silos) raise substantial questions about how agenda-setting operates when there is no longer a single mainstream media agenda.

Originators

Bernard Cohen (foundational formulation, 1963); Maxwell McCombs and Donald Shaw (empirical foundation, 1972 Chapel Hill Study); subsequent development by McCombs, Shaw, Jian-Hua Zhu, and broader political communication community high

Year / Decade

1963 (Cohen formulation); 1972 (McCombs-Shaw Chapel Hill Study); ongoing development high

Primary sources

Cohen, B.C. (1963). The Press and Foreign Policy, McCombs, M.E. & Shaw, D.L. (1972). 'The Agenda-Setting Function of Mass Media', Public Opinion Quarterly, McCombs, M.E. (2004, 2nd ed. 2014). Setting the Agenda: The Mass Media and Public Opinion high

Core components

Media power to shape what people think about (vs telling them what to think)
First-level agenda setting (issue salience)
Second-level agenda setting / attribute agenda setting (emphasis on particular issue attributes)
Priming (agenda-set issues become evaluation criteria)
Framing (how issues are presented)
Agenda building (who influences the media agenda)
Third-level / network agenda setting
Cohen formulation: press successful at telling people what to think about, less successful at what to think
Substantial empirical support over decades
Contemporary challenges from fragmented media environment

Primary use case

Foundation of political communication research; reference framework for media-politics research and analysis; basis for substantial work on framing, priming, and political opinion formation; foundation for some commercial media-monitoring and political-communication consulting; influence on journalism education (responsibility for agenda-setting); pedagogical reference in political communication and media studies education; growing application to social media and algorithmic-media dynamics.

Common criticisms

Distinction between agenda setting and framing has become somewhat blurred — second-level agenda setting and framing overlap substantially, raising questions about whether they're distinct theoretical constructs
contemporary fragmented media environment raises substantial questions about how agenda-setting operates when there is no longer a single mainstream agenda — different media silos may have substantially different agendas, undermining the theory's classic single-agenda-setting-public framing
selection effects: media may set agendas reflecting public interest rather than driving it (reverse causation)
commercial agenda-setting research often operationalizes weakly
integration with broader political behavior research has been productive but incomplete
tendency in some applications to attribute political outcomes to agenda-setting without testing alternative explanations
cross-cultural variation in media-politics relationships substantially affects theory generalizability
algorithmic curation in social media operates differently from traditional editorial agenda-setting in ways the original framework didn't anticipate
tendency to use the theory in confirmation rather than disconfirmation contexts.

Lineage

Siblings: Spiral of Silence, Overton Window