Supplementary files for "How we think about the political stances of others: evidence on projection from Canada, Germany, and the UK"

Supplementary files for article "How we think about the political stances of others: evidence on projection from Canada, Germany, and the UK"<br><br>What leads people to assume that others are more or less similar to them ideologically? To answer this question, this article uses original data from three multi?party democracies to analyse respondents’ assumptions about the ideological proximity of hypothetical voters. In doing so, it focusses on an underexamined psychological mechanism in political science research – projection onto in-group members – with the aim of extending our understanding of the factors shaping second-order political beliefs. The article empirically assesses the impact of this mechanism, using an original survey experiment fielded in Canada, Germany, and the United Kingdom to examine the effect of shared partisanship and overlapping demographic markers on presumed ideological similarity. Results suggest that in all three countries, shared group membership plays an important role in shaping second-order political beliefs, though the effect of socio?demographic similarity is only robust in the absence of a clear partisan affiliation.<br><br>© Informa UK Limited, Taylor &amp; Francis Group, CC BY-NC-ND

论文《我们如何看待他人的政治立场：来自加拿大、德国与英国的投射效应证据》补充材料

是什么促使人们认为他人在意识形态上或多或少与自己相似？为解答这一问题，本文依托来自三个多党制民主国家的一手数据，分析受访者对假想选民意识形态亲近程度的推测。在此过程中，本文聚焦政治学研究中一项尚未被充分探讨的心理机制——对内群体成员的投射效应（projection），旨在拓展我们对塑造二阶政治信念的各类影响因素的认知。本文通过在加拿大、德国与英国实施的原创性调查实验，实证检验该心理机制的影响效果，具体考察共同党派身份与重叠人口统计特征对推测出的意识形态相似性的作用。研究结果显示，在上述三个国家中，共同群体身份对二阶政治信念的塑造均发挥着重要作用，不过社会人口统计学特征相似性的影响仅在无明确党派归属的情境下才表现稳健。

© Informa UK Limited，泰勒弗朗西斯出版集团，CC BY-NC-ND