Balance the Pairs of Stimuli
This function balances the pairs of stimuli so that each stimulus appears equally often as the first or second member of a pair.
A matrix where the elements correspond to the ordinal position of the stimulus presented first in each pair
A matrix where the elements correspond to the ordinal position of the stimulus presented second in each pair
The number of stimuli
This function is called in the
A data frame of the ordinal positions for the balanced pairs of stimuli.
Davison, M. L. Zieffler, A. Cabrera, J. Karl, S. R. and Cohen, H. S. in press Automated Assembly of Optimally Spaced and Balanced Paired Comparisons: Controlling Order Effects. Behavioral Research Methods. DOI 10.3758/s13428-011-0170-0
Cohen, H.S. and Davison, M.L. 1973 Jiffy-Scale: A FORTRAN IV Program for Generating Ross-Ordered Paired Comparisons. Behavioral Science, 18, 1, 76.
Ross, R.T. 1934 Optimimum Orders for the Presentation of Pairs in the Method of Paired Comparisons. Journal of Educational Psychology, 25, 5, 375–382.
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