According to the audience-effects model, media coverage interacts with the audience's pre-existing sensitivities to produce changes in issue concerns. Thus, media effects are contingent on issue-specific audience characteristics. For instance, for high-sensitivity audiences who are most affected by a certain issue or a problem, the salience of this issue increases substantially with news exposure, while the same exposure has little effect on other groups. Erbring, Goldenberg and Miller have also demonstrated that people who do not talk about political issues are more subject to agenda-setting influence because they depend more heavily on media content than those who receive information from other sources, including their colleagues and friends.