If an Experiment Had Four Conditions A, B, C, and D)

Multiple Choice

If an experiment had four conditions A, B, C, and D) and each participant is to be measured under each condition, intragroup incomplete counterbalancing might be the best method to use. Which of the following describes this method?

A) Group I: ABDC; Group II: BCAD; Group III: CDBA; Group IV: DACB
B) Group I: ABCD; Group II: BCDA ;Group III: CDAB; Group IV: DABC
C) ABCDDCBA
D) ABCD