Table 5. Parameters of the clusters provided by the k-mean algorithm for the category, Mountain. ∗∗∗ indicates a significant difference (t-test, p < .001) between the cluster in term for FD or SA. (ns) indicates that differences were not significant.
| FD (ms) | SA(t − 1) | Number of cases | % | |
| Cluster 1 | 172.84 | 11.01 | 4,072 | 28.73 |
| Cluster 2 | 164.77(ns) | 2.53∗∗∗ | 10,099 | 71.26 |
| FD (ms) | SA(t + 1) | Number of cases | % | |
| Cluster 1 | 164.85 | 11.05 | 4,299 | 28.49 |
| Cluster 2 | 168.99(ns) | 2.55∗∗∗ | 10,790 | 71.5 |