"[...] technological changes in the media sector have opened up a range of new analytical opportunities for understanding the impact that media can have across a range of relevant criteria. Thus, the field of media impact assessment is in a period of rapid innovation and change, in which new approaches to defining and measuring impact are being developed and adopted. The goal of this report is to provide a comprehensive overview and assessment of the approaches being employed in this formative period of assessing media impact, with a focus on what is termed here a social value perspective. Social value in this context refers to analytical approaches that extend beyond financial measures of success to take into account criteria such as improving the well-being of individuals and communities across a wide range of dimensions that are central goals of most public interest media initiatives. This report seeks to identify relevant analytical approaches, methodologies, and metrics for assessing media impact in an effort to develop a baseline inventory of analytical tools, methods, and metrics that can inform further work in this area; and to identify approaches that appear particularly promising. The key themes that emerge from the media impact literature include: 1. The importance of media impact assessment maintaining a high degree of methodological flexibility and diversity [...] 2. The availability of a broad range of performance metrics [...] 3. The centrality of audience engagement to impact assessment." (Executive summary, page 4-5)