The Moreno scale for Britishness and Scottishness asked respondents whether they felt more British than Scottish.
Our national identity scales instead ask Scottish respondents to place themselves on a 7 point Britishness, Scottishness and Englishness scale. This allows a comparison of more than two identities and preliminary analysis of the Scottish Social Attitudes survey suggested that the two variables separately were better at predicting referendum intention than the Moreno scale.
We also felt that being able to look at the extent to which multiple identities are felt to be more compatible with Britishness than others.