Table 3.
Characteristics of the four clusters of gaze points, corresponding to robot and objects, in the normalized head's pitch-yaw space of the participants in HI and RI groups.
| Target | Phase | Yaw mean | Var | Pitch mean | Var | Density mean | Std | Wilcoxon's test |
|---|---|---|---|---|---|---|---|---|
| Robot | HI | 2.51 | 31.52 | 0.40 | 42.38 | 0.647 | 0.197 | W = 22, |
| RI | 2.24 | 26.05 | 5.61 | 31.31 | 0.673 | 0.259 | p-value = 0.804 | |
| Left object | HI | −33.56 | 50.08 | 13.92 | 172.13 | 0.089 | 0.050 | W = 37, |
| RI | −25.45 | 47.44 | 13.54 | 109.67 | 0.052 | 0.049 | p-value = 0.128 | |
| Center object | HI | 5.88 | 34.21 | 18.78 | 59.25 | 0.190 | 0.213 | W = 26, |
| RI | 0.82 | 20.96 | 28.08 | 39.05 | 0.229 | 0.258 | p-value = 0.901 | |
| Right object | HI | 31.60 | 51.44 | 16.94 | 176.88 | 0.072 | 0.054 | W = 32, |
| RI | 29.58 | 85.28 | 12.73 | 118.95 | 0.045 | 0.037 | p-value = 0.383 |
Mean and variance refer to the coordinates of the x- and y-axis (yaw and pitch) of the points in each cluster. Wilcoxon's test was applied on the normalized densities of each cluster.