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 among social psychologists. Previous studies found that social dominance orientation is one of the robust correlates of individual differences in the endorsement of intergroup conflicts, such as conservative political attitudes. While the relationship between SDO and political attitudes was extensively 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 = 477) to replicate the positive correlation between SDO and political attitudes in Mifune and Yokota (2018) who collected the data ten years ago. Using Bayesian inferences, we showed that while SDO and political attitudes have changed over the last ten years, the correlation between them still holds, suggesting that SDO is a robust correlate of political attitudes. We took an opportunity to also replicate the previously observed negative correlation between SDO and support for political apologies, and we successfully replicated it. We discuss the changes in SDO and political attitudes in the past ten years in Japan, as well as the consistency of the relationship between them.