Table 4 Interrater Cohen’s k scores. Contingency table and symmetric measures for the Categories of Record Quality (CRQ): Better, Fair and Worse. Obs.1 = Observer 1; Obs. 2 = Observer 2
From: Selection of test bites records as part of a forensic bite mark analysis protocol
Obs. 2 | Total (%) | ||||
|---|---|---|---|---|---|
1st TEST BITE (%) | 2nd TEST BITE (%) | 3rd TEST BITE (%) | |||
Contingency table for CRQ Better | |||||
Obs.1 | 1st TEST BITE (%) | 6 (20.0) | 1 (3.3) | 0 (0.0) | 7 (23.3) |
2nd TEST BITE (%) | 0 (0.0) | 10 (33.3) | 1 (3.3) | 11 (36.7) | |
3rd TEST BITE (%) | 1 (3.3) | 0 (0.0) | 11 (36.7) | 12 (40.0) | |
Total (%) | 7 (23.3) | 11 (36.7) | 12 (40.0) | 30 (100.0) | |
Kappa value = .846 | |||||
p value = < 0.001 | |||||
Contingency table for CRQ Fair | |||||
Obs.1 | 1st TEST BITE (%) | 9 (30.0) | 0 (0.0) | 2 (6.7) | 11 (36.7) |
2nd TEST BITE (%) | 1 (3.3) | 8 (26.7) | 1 (3.3) | 10 (33.3) | |
3rd TEST BITE (%) | 0 (0.0) | 2 (6.7) | 7 (23.3) | 9 (30.0) | |
Total (%) | 10 (33.3) | 10 (33.3) | 10 (33.3) | 30 (100.0) | |
Kappa value = .700 | |||||
p value = < 0.001 | |||||
Contingency table for CRQ Worse | |||||
Obs.1 | 1st TEST BITE (%) | 11 (36.7) | 1 (3.3) | 0 (0.0) | 12 (40.0) |
2nd TEST BITE (%) | 0 (0.0) | 8 (26.7) | 1 (3.3) | 9 (30.0) | |
3rd TEST BITE (%) | 2 (6.7) | 0 (0.0) | 7 (23.3) | 9 (30.0) | |
Total (%) | 13 (43.3) | 9 (30.0) | 8 (26.7) | 30 (100.0) | |
Kappa value = .797 | |||||
p value = < 0.001 | |||||