Evaluation: Quantitative approach (strength)
A strength of Bem's work is that androgyny is measured quantitatively.
The numerical approach is useful for research purposes when it's necessary- eg, to quantify a dependent variable.
Janet Spence argues that there's more to gender than a set of behaviours typical of one fender, so qualitative methods offer a better way of analysing gender.
One compromises is to combine different scale - eg, the personal attributes questionnaire (PAQ) adds another dimension (instrumentality and expressively) to Bem's masculinity-femininity dimension.
Suggests that both quantitative together with qualitative approaches may be useful for studying different aspects of androgyny.