complete counterbalancing
a process of arranging a series of experimental conditions or treatments in such a way that every possible sequence of conditions is given at least once during the study. For instance, the following arrangement of sequences of three treatments (A, B, C), each assigned to a different subgroup of participants, demonstrates complete counterbalancing: A-B-C, A-C-B, B-C-A, B-A-C, C-A-B, and C-B-A. Compare incomplete counterbalancing.