...okay, I started the Cross-over trials by Jones and Kenward, and immediately got another stupid question (yay, me): if we do a two-period two-treatment design, with subject group 1 crossing over from A to B and subject group 2 crossing from B to A, and we note the effects for A and B, how many controls do we need to run? As in, surely we would need a sg 3 which receives no treatment, sg 4, 5 and 6 which receive only treatment A (in the first half; in the second half; for the full duration of the experiment) and sg 7, 8 and 9 which receive only B?..
If they talk about this later on, please ignore this question.
...okay, I started the Cross-over trials by Jones and Kenward, and immediately got another stupid question (yay, me): if we do a two-period two-treatment design, with subject group 1 crossing over from A to B and subject group 2 crossing from B to A, and we note the effects for A and B, how many controls do we need to run? As in, surely we would need a sg 3 which receives no treatment, sg 4, 5 and 6 which receive only treatment A (in the first half; in the second half; for the full duration of the experiment) and sg 7, 8 and 9 which receive only B?..
If they talk about this later on, please ignore this question.