I am trying to check the significance of counselling in the technique for inhaler usage (rotahaler only) at different points of time in same subjects.
The subjects' baseline technique will be assessed using a checklist scoring : zero for incorrect/ missed step and 1 for correct step. The total score is 8 (i.e., the checklist has 8 steps). Then subject will be counselled and an immediate post intervention score is taken followed by another assessment after 2 weeks.
I want to compare the means at 3 points in time. Can I use a repeated measures ANOVA here? If not, which test is suitable?