| Study type . | Test set . | Participants . | . | |
|---|---|---|---|---|
| . | # Knowns . | # Unknowns . | . | . |
| Closed set | 10 | 10 or 12 | 15 examiners | |
| Experiment count data | ||||
| Identification | Inconclusive | Elimination | Source total | |
| Same source | 174* | 1 | 3 | 178 |
| Different source | 3 | ? | ? | ? |
| Conclusion total | 177 | ? | ? | ? |
| Conclusion-specific probabilities | ||||
| Identification | Inconclusive | Elimination | ||
| Same source | 0.9831 | ? | ? | Experiment count data are divided by conclusion totals (3rd row) |
| Different source | 0.0169 | ? | ? | |
| Total # comparisons | 177 | ? | ? | |
| Source-specific probabilities | ||||
| Identification | Inconclusive | Elimination | Total # comparisons | |
| Same source | 0.9775 | 0.0056 | 0.0169 | 178 |
| Different source | ? | ? | ? | ? |
| Experiment count data are divided by source totals (last column) | ||||
| Overall error rates | ||||
| Opt. | Meaning | Missed identification | Missed elimination | Total |
| 2 | FTE error | 0.0169 | ? | ? |
| 3 | Process error | 0.0225 | ? | ? |
| 4 | Inconcl. = Elim. | 0.0225 | ? | ? |
| Study type . | Test set . | Participants . | . | |
|---|---|---|---|---|
| . | # Knowns . | # Unknowns . | . | . |
| Closed set | 10 | 10 or 12 | 15 examiners | |
| Experiment count data | ||||
| Identification | Inconclusive | Elimination | Source total | |
| Same source | 174* | 1 | 3 | 178 |
| Different source | 3 | ? | ? | ? |
| Conclusion total | 177 | ? | ? | ? |
| Conclusion-specific probabilities | ||||
| Identification | Inconclusive | Elimination | ||
| Same source | 0.9831 | ? | ? | Experiment count data are divided by conclusion totals (3rd row) |
| Different source | 0.0169 | ? | ? | |
| Total # comparisons | 177 | ? | ? | |
| Source-specific probabilities | ||||
| Identification | Inconclusive | Elimination | Total # comparisons | |
| Same source | 0.9775 | 0.0056 | 0.0169 | 178 |
| Different source | ? | ? | ? | ? |
| Experiment count data are divided by source totals (last column) | ||||
| Overall error rates | ||||
| Opt. | Meaning | Missed identification | Missed elimination | Total |
| 2 | FTE error | 0.0169 | ? | ? |
| 3 | Process error | 0.0225 | ? | ? |
| 4 | Inconcl. = Elim. | 0.0225 | ? | ? |
Lyons (2009) reports 175 correct identifications, but it is clear from the discussion that one of those same source identifications was in fact an inconclusive. Twelve answer sheets with 12 correct identifications, one with 10 (out of 10) correct identifications, one with 9 correct identifications and 3 errors, and one with 11 correct identifications and one inconclusive. So 12.12 + 10 + 9 + 11 = 174.
| Study type . | Test set . | Participants . | . | |
|---|---|---|---|---|
| . | # Knowns . | # Unknowns . | . | . |
| Closed set | 10 | 10 or 12 | 15 examiners | |
| Experiment count data | ||||
| Identification | Inconclusive | Elimination | Source total | |
| Same source | 174* | 1 | 3 | 178 |
| Different source | 3 | ? | ? | ? |
| Conclusion total | 177 | ? | ? | ? |
| Conclusion-specific probabilities | ||||
| Identification | Inconclusive | Elimination | ||
| Same source | 0.9831 | ? | ? | Experiment count data are divided by conclusion totals (3rd row) |
| Different source | 0.0169 | ? | ? | |
| Total # comparisons | 177 | ? | ? | |
| Source-specific probabilities | ||||
| Identification | Inconclusive | Elimination | Total # comparisons | |
| Same source | 0.9775 | 0.0056 | 0.0169 | 178 |
| Different source | ? | ? | ? | ? |
| Experiment count data are divided by source totals (last column) | ||||
| Overall error rates | ||||
| Opt. | Meaning | Missed identification | Missed elimination | Total |
| 2 | FTE error | 0.0169 | ? | ? |
| 3 | Process error | 0.0225 | ? | ? |
| 4 | Inconcl. = Elim. | 0.0225 | ? | ? |
| Study type . | Test set . | Participants . | . | |
|---|---|---|---|---|
| . | # Knowns . | # Unknowns . | . | . |
| Closed set | 10 | 10 or 12 | 15 examiners | |
| Experiment count data | ||||
| Identification | Inconclusive | Elimination | Source total | |
| Same source | 174* | 1 | 3 | 178 |
| Different source | 3 | ? | ? | ? |
| Conclusion total | 177 | ? | ? | ? |
| Conclusion-specific probabilities | ||||
| Identification | Inconclusive | Elimination | ||
| Same source | 0.9831 | ? | ? | Experiment count data are divided by conclusion totals (3rd row) |
| Different source | 0.0169 | ? | ? | |
| Total # comparisons | 177 | ? | ? | |
| Source-specific probabilities | ||||
| Identification | Inconclusive | Elimination | Total # comparisons | |
| Same source | 0.9775 | 0.0056 | 0.0169 | 178 |
| Different source | ? | ? | ? | ? |
| Experiment count data are divided by source totals (last column) | ||||
| Overall error rates | ||||
| Opt. | Meaning | Missed identification | Missed elimination | Total |
| 2 | FTE error | 0.0169 | ? | ? |
| 3 | Process error | 0.0225 | ? | ? |
| 4 | Inconcl. = Elim. | 0.0225 | ? | ? |
Lyons (2009) reports 175 correct identifications, but it is clear from the discussion that one of those same source identifications was in fact an inconclusive. Twelve answer sheets with 12 correct identifications, one with 10 (out of 10) correct identifications, one with 9 correct identifications and 3 errors, and one with 11 correct identifications and one inconclusive. So 12.12 + 10 + 9 + 11 = 174.
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