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Cross-classifications of both gradings given by 6 nonexperts are calculated for 50 swallows: the pattern of agreement (diagonal) and the total frequency of assigned scores for gradings 1 and 2 are shown.
| Grading 2 | Total | % | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |||
| Grading 1 | ||||||||
| 1 | 70 | 6 | 5 | 5 | 0 | 2 | 88 | 29.3 |
| 2 | 5 | 44 | 2 | 7 | 0 | 4 | 62 | 20.7 |
| 3 | 1 | 3 | 23 | 2 | 0 | 2 | 31 | 10.3 |
| 4 | 1 | 2 | 1 | 28 | 3 | 7 | 42 | 14 |
| 5 | 0 | 0 | 0 | 2 | 1 | 4 | 7 | 2.3 |
| 6 | 0 | 4 | 1 | 5 | 1 | 59 | 70 | 23.3 |
|
| ||||||||
| Total | 77 | 59 | 32 | 49 | 5 | 78 | 300 | 100 |
| % | 25.7 | 19.7 | 10.7 | 16.3 | 1.7 | 26 | ||
