We address the effects of negative campaign advertising on turnout. Using a unique experimental design in which advertising tone is manipulated within the identical audiovisual context, we find that exposure to negative advertisements dropped intentions to vote by 5%. We then replicate this result through an aggregate-level analysis of turnout and campaign tone in the 1992 Senate elections. Finally, we show that the demobilizing effects of negative campaigns are accompanied by a weakened sense of political efficacy. Voters who watch negative advertisements become more cynical about the responsiveness of public officials and the electoral process.
We review recent empirical evidence that shows political campaigns are more potent than widely believed, focusing on the conceptual and methodological advances that have produced these findings. Conceptually, a broader definition of effects--that includes learning and agenda-control, as well as vote choice--characterizes contemporary research. This research also features two kinds of interactive models that are more complex than the traditional hypodermic (message-based) approach. The resonance model considers the relationship between message content and receivers' predispositions, while the strategic model highlights the interactions between competing messages. Finally, we attribute the emergence of stronger evidence in favor of campaign effects to the use of new methodologies including experimentation and content analysis, as well as the more sophisticated use of sample surveys.
Experiments show significant demobilizing and alienating effects of negative advertising. Although internally valid, experiments may have limited external validity. Aggregate and survey data offer two ways of providing external validation for experiments. We show that survey recall measures of advertising exposure suffer from problems of internal validity due to simultaneity and measurement error, which bias estimated effects of ad exposure. We provide valid estimates of the causal effects of ad exposure for the NES surveys using instrumental variables and find that negative advertising causes lower turnout in the NES data. We also provide a careful statistical analysis of aggregate turnout data from the 1992 Senate elections that Wattenberg and Brians (1999) recommend. These aggregate data confirm our original findings. Experiments, surveys, and aggregate data all point to the same conclusion: Negative advertising demobilizes voters.
This article documents three types of media effects that operated on public opinion during the Persian Gulf crisis and war. First, the level of network news coverage matched the proportion of Gallup poll respondents naming the Gulf crisis as the nation's most important problem (agenda-setting ). Second, use of data from the 1988, 1990, and 1991 National Election Studies (NES) shows that the weight respondents accorded foreign policy performance when evaluating George Bush significantly increased (priming ) in the aftermath of the Gulf crisis. Third, content data (showing that network news coverage was preoccupied with military affairs and highly event oriented) and survey data are coupled to show that respondents reporting higher rates of exposure to television news expressed greater support for a military as opposed to a diplomatic response to the crisis (framing ). In conclusion, it is suggested that these effects, in combination with the nature of the media's information sources, were conducive to legitimizing the administration's perspective on the crisis.
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