Group: Forum Members
For properly counterbalancing,I am still not getting this right.
So, in our LDT - we have 4 sets:
Positive list1 (P1), Positive list2 (P2), Negative list1 (N1) and Negative list2 (N2)
We have created a combination of of these sets as follows:
1. P1N1 always presented with images A and B. P2N2 always presented with images C and D. This will then be counterbalanced.
2. P2N2 with A and B. P1N2 with C and D. This is also counterbalanced
3. P1N2 with A and B. P2N1 with C and D. Again, this is counterbalanced
4. P2N2 with A and B. P1N1 with C and D. Again, this is counterbalanced. Therefore, we will have 8 different conditions.
Moreover, each subject will complete 4 blocks:
block 1: they are conditioned with 4 images A, B, C and D
block 2: they complete LDT with one of the above combination of the lists with these images.
block 3: they are conditioned with another different set of images a, b, c and d
block 4: they complete LDT again with another combination of the list from the above with these images (a, b, c and d).
I am really stuck on how to NOT repeat the same combination of LDT words between the two blocks! I seem to have a programming block! If there is anything like that! Would you please suggest a simple way of doing this, please? The only way that comes to my mind, right now, is to create several blocks with all these combinations and present them in different experiments but that will create too many. Since this is a within-subjects study, we need only 34 subjects and doing that will mean that we won't run all the experiments! Please help!
Thanks a ton!!!!