Cross-temporal replication of the relationship between SDO and political attitudes in Japan: SDO and attitudes shifted but the relationship holds.

Intergroup conflicts lead to devastating consequences and the elucidation of the cause of conflicts has been one of the central and pressing issues. Previous studies found that social dominance orientation (SDO) is a strong predictor of individual differences in endorsing specific policies that can enhance intergroup conflict, such as increasing defense costs. While the relationship between SDO and some specific policies has been examined in Western contexts, there has been much less research in non-Western contexts. Moreover, previous studies revealed that the relationship varies between non-Western countries. We conducted a study (N = 560) to replicate the positive correlation between SDO and political attitudes related to conservatism in Mifune and Yokota (2018) who collected the data in 2012. Using Bayesian inferences, we showed that while SDO and some policy attitudes have changed between samples over the last ten years, the correlation between them remained mostly unchanged even after controlling for conservatism. We discuss the consistency of the relationship between SDO and conservative political attitudes in the past ten years in Japan.