M{a} Angeles Cea D'Ancona (2005). Metodos de encuesta. Teoria y practica, errores y mejora. [Survey Methodologies. Theory and Practice, Errors and Improvement.] Madrid, Espana: Sintesis, 493 pp., ISBN 84-9756-250-X.     

Rodriguez-Polo  Xose Ramon 《Int. Journal of Public Opinion Research》2006,18(1):137-139

We may say that, up to now, surveys are the research methodmost commonly used and checked in social science and publicopinion studies. The predominant use of surveys in social researchis almost universal. This is demonstrated by the constant increaseof publications and research studies about or based on surveys,coming from all latitudes. But, above all, surveys and opinionpolls play an essential political role in the development ofour democracies. They have become the accepted way experts andlegislators can get to know what people think in general, howthey feel about specific topics and, finally, what their reactionis to political decisions. The measurement of public opinionby opinion polls is the main tool politicians have  相似文献