Table 4.
-values of statistical tests to understand the effect of each factor.
| Factor | Sets Compared | FAR | GAR | ACC | Inference |
| Familiarity | FS-I & US | 0.7829 ( ) |
 0.0001 ( ) |
0.0035 ( ) |
Unfamiliarity degrades GAR but not FAR |
| FS-II & US | 0.6856 ( ) |
0.0022 ( ) |
0.0061 ( ) |
||
| Ethnicity | US & UD | 0.0715 ( ) |
0.9103 ( ) |
0.0789 ( ) |
No additional degradation |
| Consistency | FS-I & FS-II | 0.6878 ( ) |
0.1025 ( ) |
0.7199 ( ) |
Both sets are consistent |
| Gender | FS-I (M) & FS-I (F) | 0.1573 ( ) |
0.2420 ( ) |
0.0171 ( ) |
Female are better in Sets FS-I and FS-II. For other sets no significant difference is observed |
| FS-II (M) & FS-II (F) | 0.4529 ( ) |
0.6801 ( ) |
 0.0001 ( ) |
||
| US (M) & US (F) | 0.3776 ( ) |
0.3785 ( ) |
0.9535 ( ) |
||
| UD (M) & UD (F) | 0.3535 ( ) |
0.2737 ( ) |
0.1524 ( ) |
represents that the corresponding statistical test show significant difference between the compared sets and 
represents insignificant difference.