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+--- Thread: within-subject blocking within a between-subject design (/showthread.php?tid=247)
within-subject blocking within a between-subject design - ytgu - 05-06-2023
Hello!
I wonder how I could counterbalance the order of "test_noise" and "test_accent" for a between-subject design? Subjects should be randomly assigned to Group 1, 2, or 3, but they will complete both noise test and accent test, and I wish to counterbalance the order of these 2 test blocks. Here's my code:
"block_sequence": [
"General_Instruction", "Subject_ID", "Sound_check",
{"Group1":["c_practice", "c_exposure_1", "c_exposure_2", "c_exposure_3", "c_test_noise", "c_test_accent", "c_baseline"],
"Group2":["n_practice", "n_exposure_1", "n_exposure_2", "n_exposure_3", "n_test_noise", "n_test_accent", "n_baseline"],
"Group3":["a_practice", "a_exposure_1", "a_exposure_2", "a_exposure_3", "a_test_noise", "a_test_accent", "a_baseline"]}
"Survey"]
Thanks!
RE: within-subject blocking within a between-subject design - Ting - 05-06-2023
Hello! Perhaps one way you can do is to create subgroups of those 3 main groups. For example, you can have
Group1.1, Group1.2, Group1.3
Group2.1, Group2.2, Group2.3
Group3.1, Group3.2, Group3.3
(functionally they are 9 parallel groups, but semantically there are two levels)
Then, between the main groups, you can keep the C vs N vs A distinction. But within the groups (e.g., for Group1.1-Group1.3), you can create more blocks that semi-manually counterbalance the orders of those test blocks. For example, Groups 1.x will have the order A B C, Group 2.x B A C, and then Group 3.x C A B. That way you'll achieve between group counterbalance as well.
Let us know if this works!
RE: within-subject blocking within a between-subject design - ytgu - 05-08-2023
(05-06-2023, 08:56 PM)Ting Wrote: Hello! Perhaps one way you can do is to create subgroups of those 3 main groups. For example, you can have
Group1.1, Group1.2, Group1.3
Group2.1, Group2.2, Group2.3
Group3.1, Group3.2, Group3.3
(functionally they are 9 parallel groups, but semantically there are two levels)
Then, between the main groups, you can keep the C vs N vs A distinction. But within the groups (e.g., for Group1.1-Group1.3), you can create more blocks that semi-manually counterbalance the orders of those test blocks. For example, Groups 1.x will have the order A B C, Group 2.x B A C, and then Group 3.x C A B. That way you'll achieve between group counterbalance as well.
Let us know if this works!
Hi Ting!
Thank you for your suggestion! Yes I think this works well
