Executive Memo on a new Populist Attitudes Scale * Bruno Castanho Silva Ioannis Andreadis Eva Anduiza Nebojša Blanuša Yazmin M. Corti Gisele Delfino Guillem Rico Saskia P. Ruth Bram Spruyt Marco Steenbergen Levente Littvay In recent years, scholars have started to measure and explain populism at the micro-level, as an attitude that individuals hold about politics. Multiple scales have been proposed but, as the broad overview by Van Hauwaert et al. (forthcoming) and Van Hauwaert et al. (2016) show, they all have limitations. Most do not capture a broad range of the phenomenon – being able to discriminate only among moderately populist and moderately not-populist individuals – and have little cross-cultural va- lidity. We have used standard scale-development approaches from psychology to produce a short battery of six to nine items measuring populist attitudes, divided into three dimensions. The scale has conceptual breadth, travels well across eighteen samples collected in fourteen different countries, and includes one negative-worded item in each dimension. The proposed scale, with items measured in standard agree- disagree responses, is below. The recommendations are ordered. This means that the last item in each dimension (those in italic) can be left out by researchers who prefer to run a shorter, six-item battery. Suggestions: 1 * This is a short report with item recommendations for a populist attitudes scale. The full version of the study is in a forthcoming book chapter with the following citation: Castanho Silva, Bruno, Ioannis Andreadis, Eva Anduiza, Nebojša Blanuša, Yazmin Morlet Corti, Gisela Delfino, Guillem Rico, Saskia P. Ruth, Bram Spruyt, Marco Steenbergen, and Levente Littvay. forthcoming. “Public Opinion Surveys: a New Scale”. In: The Ideational Approach to Populism: Theory, Method & Anal- ysis, edited by Kirk A. Hawkins, Ryan Carlin, Levente Littvay, and Cristóbal Rovira Kaltwasser. London: Routledge. If you use the scale recommended here, please cite the respective book chapter. 1 Translations into Croatian, Dutch, French, German, Greek, Hungarian, Italian, Portuguese, and Spanish may be found at the end of this document. 1