| AUC | 95 % CI | Cutoff point (%) |
---|---|---|---|
Human face | Â | Â | Â |
 A) Still image |  |  |  |
  % eyes | .73 | .60–.87 | <71 |
  % mouth | .63 | .48–.78 | >7 |
 B) Blinking |  |  |  |
  % eyes | .80 | .68–.92 | <81 |
  % mouth | .79 | .65–.92 | >8 |
 C) Mouth moving |  |  |  |
  % eyes | .65 | .50–.81 | <20 |
  % mouth | .59 | .43–.75 | >32 |
 D) Silent |  |  |  |
  % eyes | .75 | .60–.89 | <32 |
  % mouth | .66 | .50–.82 | >16 |
 E) Talking |  |  |  |
  % eyes | .62 | .46–.80 | <11 |
  % mouth | .54 | .38–.71 | >38 |
Biological motion | Â | Â | Â |
 F) Biological motion |  |  |  |
  % upright | .59 | .44–.75 | <50 |
  % inverted | .59 | .43–.75 | >48 |
People and geometry | Â | Â | Â |
 G) Same size |  |  |  |
  % people | .74 | .60–.88 | <57 |
  % geometry | .69 | .54–.84 | >37 |
 H) Small window |  |  |  |
  % geometry | .62 | .46–.78 | >31 |