Table 1a. Change in support for a candidate for the US. House of Representatives by level of exposure to negative campaign advertisements (ads) sponsored by the candidate in a sample of potential voters in a Midwestern state. Number of Negative Campaigp Ads Seen None or a Few Some Many x2 = 0.240, df= 4, p > .05 Change in Support for the Ad-Sponsoring Candidate Less No More Support Change Support Total 35.0% 47.2 17.8 100.0% (180) 35.6% 48.3 16.1 100.0% (230) 35.5% 47.1 17.4 100.0% (155)