I have three treatments: control, treatment1, and treatment2. A total of four patients were examined after receiving each of these three treatments. The dependent variable is continuous. My dataset looks like this:
Patients control treatment1 treatment2 patient1 23.4 34.5 67.4 patient2 10.9 78.9 23.0 patient3 23.2 50.8 100.8 patient4 24.2 67.1 90.8
I first performed one-way ANOVA, and got a p-value of 0.45. Then, considering repeated measures data in my case (paired data for each patient), I was thinking that I should use repeated measures ANOVA, but I am having trouble in deciding which test to use for small-sample data.
I hope somebody could provide me not only with a good idea about this specific case, but also about important issues related to small-sample data analysis.