In reply to ianstevens:
i'd read that- but i didn't think that looked right- as in the examples, there is only one population, with measures either at different time points, or exposed to different interventions (cake variety, in the examples given...)
i've got two groups, at two time points- so of the independent variables, 2 are linked- the same people at two time points- and two are separate- patients/controls.
so i *think* its a mixed models ANOVA- but would like someone that actually knows about this to tell me if i'm in the right area..!