Deciding about the unknown: The effect of party and ideological cues on forming opinions about the European Union

This article contributes to the literature on political heuristics by reporting two survey experiments conducted in Spain in 2014-2015 on party and ideology cues regarding preferences on a range of European Union and domestic issues in European and general elections. The findings reveal that party cues increase voters' competence to take positions on European Union issues more than ideological ones. Cues increase competence in a similar fashion regardless of the nature of the topic, although the effect of cues that parties provide on European Union issues seems to be stronger than that of cues on domestic policies. Party cueing effects are also consistent across different electoral arenas (national vs. European), and for all types of parties regardless of their age or positions toward the European Union integration process.