Table 1
Table depicts comparison of highest, lowest, most frequent, and average scores attained by Laypersons and FDEs who examined and compared the same homogenous writing specimens.
| Scores | Forensic Document Examiners | Laypersons |
|---|---|---|
| Highest | 100% (29) | 100% (1) |
| Lowest | 85% (1) | 33% (1) |
| Mode | 100%(29) | 90% (6) |
| Group Average | 98% | 76% |
Figure 1
Figure 1 shows the distribution of correct scores for Laypersons and FDE subjects plotted as histograms.
Table 2
Comparison of incorrect associations made of Q documents by FDEs and Laypersons. 13 of the Qs were found to be problematic for the FDE Group, however, all 43 Qs were found to be problematic for the Laypersons.
| PROBLEMATIC QUESTIONED DOCUMENTS | ||
|---|---|---|
| QUESTIONED DOCUMENT NUMBER | Number of Incorrect Associations by LAYPERSONS | Number of Incorrect Associations by FDEs |
| Q1 | 6 | |
| Q2 | 3 | |
| Q3 | 2 | |
| Q4 | 7 | |
| Q5 | 5 | |
| Q6 | 1 | |
| Q7 | 13 | 1 |
| Q8 | 2 | |
| Q9 | 22 | |
| Q10 | 14 | 1 |
| Q11 | 2 | |
| Q12 | 3 | |
| Q13 | 17 | |
| Q14 | 3 | |
| Q15 | 12 | |
| Q16 | 21 | 1 |
| Q17 | 10 | |
| Q18 | 15 | 1 |
| Q19 | 18 | |
| Q20 | 9 | 1 |
| Q21 | 4 | |
| Q22 | 12 | |
| Q23 | 9 | |
| Q24 | 2 | |
| Q25 | 23 | 5 |
| Q26 | 1 | |
| Q27 | 17 | |
| Q28 | 17 | 8 |
| Q29 | 6 | |
| Q30 | 6 | |
| Q31 | 19 | 2 |
| Q32 | 24 | 11 |
| Q33 | 2 | |
| Q34 | 7 | |
| Q35 | 10 | 1 |
| Q36 | 12 | |
| Q37 | 18 | 1 |
| Q38 | 4 | |
| Q39 | 34 | 6 |
| Q40 | 9 | |
| Q41 | 8 | |
| Q42 | 13 | |
| Q43 | 14 | 1 |
| TOTAL NUMBER OF ERRONEOUS ASSOCIATIONS | 456 | 40 |
Table 3
Comparison of incorrect associations of K documents made by FDEs and Laypersons. 11 of the Ks were found to be problematic for the FDE Group; however, all but 3 Ks were found to be problematic for the Laypersons.
| PROBLEMATIC KNOWN DOCUMENTS | ||
|---|---|---|
| KNOWN DOCUMENT NUMBER | Number of Incorrect Associations by LAYPERSONS | Number of Incorrect Associations by FDEs |
| K1 | 4 | |
| K2 | 1 | |
| K3 | 15 | |
| K4 | 4 | |
| K5 | 3 | |
| K6 | ||
| K7 | 10 | |
| K8 | 17 | |
| K9 | 22 | 3 |
| K10 | 13 | |
| K11 | 1 | |
| K12 | 4 | |
| K13 | 5 | |
| K14 | 5 | |
| K15 | 3 | |
| K16 | 15 | 1 |
| K17 | 4 | |
| K18 | 14 | 2 |
| K19 | 7 | |
| K20 | 14 | |
| K21 | 7 | |
| K22 | 5 | |
| K23 | 12 | |
| K24 | 5 | 1 |
| K25 | 2 | |
| K26 | 7 | |
| K27 | 4 | |
| K28 | 15 | 2 |
| K29 | 2 | |
| K30 | 4 | |
| K31 | ||
| K32 | 33 | 11 |
| K33 | 11 | |
| K34 | 5 | |
| K35 | 8 | |
| K36 | 11 | |
| K37 | ||
| K38 | 14 | 1 |
| K39 | 15 | 1 |
| K40 | 13 | 1 |
| K41 | 1 | |
| K42 | 6 | |
| K43 | 3 | |
| K44 | 5 | |
| K45 | 2 | |
| K46 | 3 | |
| K47 | 15 | |
| K48 | 10 | 3 |
| K49 | 3 | |
| K50 | 14 | 1 |
| K51 | 6 | |
| K52 | 3 | |
| TOTAL NUMBER OF ERRONEOUS ASSOCIATIONS | 405 | 27 |