Automated assembly of optimally spaced and balanced paired comparisons: controlling order effects.


To control order effects in questionnaires containing paired comparisons, Ross (1934) described an optimal ordering of the pairings. The pairs can also be balanced so that every stimulus appears equal numbers of times as the first and the second member of a pair. First, we describe and illustrate the optimally spaced, balanced ordering of pairings. Then we… (More)
DOI: 10.3758/s13428-011-0170-0

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