Consider a set in which a respondent evaluates four items : A , B , C and D. If the respondent says that A is best .
D is worst , these two responses inform us about five of six possible implied paired comparisons :
Consider a set in which a respondent evaluates four items : A , B , C and D. If the respondent says that A is best and D is worst , these two responses inform us about five of six possible implied paired comparisons :