Abstract
This study examines political mechanisms under which voters' deliberation causes policy attitudes change, utilizing our nation-wide survey experiment, which modified the design of counter-argument experiment in Jackman and Sniderman (2006). We approached how counter-argument change people's policy attitudes from two analytical perspectives. One is the characteristic of those who present the counterargument, the other is that of the respondents such as partisanship and political knowledge. The results show that deliberation promotes policy attitude changes only among those who are not involved with politics and policies. Among those who get involved with politics or polices, however, not deliberation but the senders’ characteristics and its interactions with people’s partisan SID as well as political knowledge matters. This study implies the significance of political contexts when people deliberate.