Table 8 Significance of the features in \({\mathcal {F}}_1\)
From: Semi-supervised learning for detecting human trafficking
No. | Feature group | \(\chi ^2\) | Selected |
|---|---|---|---|
1 | Advertisement language pattern | ||
Third person language | 8.4 | \(\checkmark \) | |
First person plural pronouns | 9.5 | \(\checkmark \) | |
Kolmogorov complexity | 0.7 | \(\checkmark \) | |
n-grams (1) | 0.4 | ||
n-grams (2) | 0.0 | ||
n-grams (3) | 0.4 | ||
2 | Words and phrases of interest | 0.0 | |
3 | Countries of interest | 59.3 | \(\checkmark \) |
4 | Multiple victims advertised | 14.1 | \(\checkmark \) |
5 | Victim weight | 0.2 | |
6 | Reference to website or spa massage therapy | ||
Reference to website | 0.1 | ||
Reference to spa massage therapy | 33.5 | \(\checkmark \) |