[solved] randomizing a sequence of four blocks
I have this experimental structure:
My experiment - experimental loop -- block sequence --- block sequence 1 --- block sequence 2 --- block sequence 3 --- block sequence 4
Inside each block sequence there is a trial loop with a trial sequence inside.
I want to randomizing the four sequences inside the block sequence, but simply setting the random order option in the experimental loop doesn't work (I don't know why...).
In this post I have read that a solution for a similar problem is to set a order variable (in my case with the values 1, 2, 3, 4) in the experimental loop, an then use the "run if" statemant for all the permutations of the blocks order. But in my case I have to set 4! = 24 permutations! (
There does exist an easier method to randomizing?