Comparing self-categorisation approaches to measuring gender identity

This article compares two different measures of gender identity. Drawing on an online survey conducted with a representative sample of Americans that included both a single bipolar scale and separate masculinity and femininity scales, we compare how the same people respond depending on how gender identity is measured. The results of validation tests suggest that a single bipolar scale performs just as well in differentiating among those with sex-typical gender identities but separate masculinity and femininity scales are needed for studies investigating the political behaviour and preferences of those with sex-atypical identities.