McCombs et al. (1997) demonstrated that agenda-setting research at the second level deals with the influence of 'attribute' salience, whereas the first level agenda-setting illustrates the influence of 'issue' salience. Balmas and Sheafer (2010) argued that the focus at the first level agenda-setting which emphasizes media's role in telling us "what to think about" is shifted to media's function of telling us "how to think about" at the second level agenda-setting. The second level of agenda-setting considers how the agenda of attributes affects public opinion (McCombs & Evatt, 1995). Furthermore, Ghanem(1997) demonstrated that the certain attributes agendas in the news with low psychological distance, drove compelling arguments for the salience of public agenda. The second-level agenda-setting differs from traditional agenda-setting in that it focus on attribute salience, and public's attribute agenda is regarded as one of the important variables.