A programming instruction regarding the order with which different respondents are shown different things in a survey. For example, one-half of respondents may be shown product concepts in the order A, B, C, and D, and the other half in the order of D, C, B, and A.
Most commonly, randomizations are done to minimize Order Effects.
Rotations were popular in the era before computers started being used in data collection, and have now largely been replaced by randomization.
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