© 1977 by Biometrika Trust
Designs for R × C factorial paired comparison experiments
Department of Statistics, University of Florida Gainesville
Two designs for R × C factorial paired comparison experimente are compared, assuming the Bradley-Terry model. One design employs comparisons of all paira of the RC treatments, and the other degign restricts comparisons to those pairs which have the same level of one factor. Computation of maximum likelihood estimates under several hypotheses is considered for each design. The restricted design has administrative benefits because it requires comparison of fewer distinct pairs of treatments, and it permits simpler computation of the estimates. Asymptotic relative efficiencies of the associated likelihood ratio tests show the restricted design to be usually inferior for detecting main effects and superior for detecting interactions.
Key Words: Asymptotic relative efficiency Bahadur efficiency Bradley-Terry model