# APPENDIX A

Triangle Test for Difference: Critical Number (Minimum) of Correct Answers

Entries are the minimum number of correct responses required for significance at the stated significance level (i.e., column) for the corresponding number of respondents "n" (i.e., row). Reject the assumption of "no difference" if the number of correct responses is greater than or equal to the tabled value.

 Significance level (%) Significance level (%) n 10 5 1 0.1 n 10 5 1 0.1 3 3 3 - - 26 13 14 15 17 4 4 4 - - 27 13 14 16 18 5 4 4 5 - 28 14 15 16 18 29 14 15 17 19 30 14 15 17 19 6 5 5 6 - 31 15 16 18 20 7 5 5 6 7 32 15 16 18 20 8 5 6 7 8 33 15 17 18 21 9 6 6 7 8 34 16 17 19 21 10 6 7 8 9 35 16 17 19 22 11 7 7 8 10 36 17 18 20 22 12 7 8 9 10 42 19 20 22 25 13 8 8 9 11 48 21 22 25 27 14 8 9 10 11 54 23 25 27 30 15 8 9 10 12 60 26 27 30 33 16 9 9 11 12 66 28 29 32 35 17 9 10 11 13 72 30 32 34 38 18 10 10 12 13 78 32 34 37 40 19 10 11 12 14 84 35 36 39 43 20 10 11 13 14 90 37 38 42 45 96 39 41 44 48 21 11 12 13 15 22 11 12 14 15 23 12 12 14 16 24 12 13 15 16 25 12 13 15 17

Note: For values of n not in the table compute

where k is the number of correct answers.