Do referendum results change norm perceptions and personal opinions?

Referendums are often seen as a means to legitimize the outcome as the new norm and increase acceptance of the outcome. Do referendums actually have these effects? More precisely, do voters recognize the referendum result as the new norm? And do voters go as far as to change their own minds in accord with the referendum result? We explore these questions using a panel survey that we conducted in Ireland before and after the abortion referendum that was held on May 25, 2018. We find that, after the referendum, voters updated their norm perceptions in the direction of the referendum result. However, we find inconsistent evidence that the referendum convinced voters to change their personal opinions about abortion. The findings provide insights on the power and the limit of referendums in increasing policy agreement among voters.