Table 2: Face-verification accuracy results of human and a baseline algorithm [28].

Age Gap 0–5 Gap 6–10 Gap 11–15 Gap 16+

<18 0.775 | 0.344 0.744 | 0.155 0.751 | 0.078 0.789 | 0.125
18–29 0.784 | 0.420 0.792 | 0.257 0.793 | 0.134 0.812 | 0.080
30–39 0.821 | 0.452 0.803 | 0.300 0.743 | 0.231 *
40+ 0.750 | 0.800 * * *

Note: (1) “ | ’’ means “accuracy of human experiment | accuracy of PCA algorithm’’; (2) “*’’ indicates there are not enough data for evaluation. The same notations apply for other tables as well.