Table 1 Lists of linguistic and prosodic features and their IDs
Category | ID | Features | |
|---|---|---|---|
Linguistic features | Hesitation and | 1.1 | Question ratio |
puzzlement features | |||
1.2 | Filler ratio | ||
1.3 | Incomplete sentence | ||
ratio | |||
POS-based features | 2.1 | Verb freq. | |
2.2 | Noun freq. | ||
2.3 | Pronoun freq. | ||
2.4 | Adverb freq. | ||
2.5 | Adjective freq. | ||
2.6 | Particle freq. | ||
2.7 | Conjunction freq. | ||
2.8 | Pronoun-to-noun | ||
ratio | |||
Intelligibility | 3 | Unintelligible word ratio | |
Complexity features | 4.1 | Standardized word | |
entropy | |||
4.2 | Suffix ratio | ||
4.3 | Number ratio | ||
4.4 | Brunet’s index | ||
4.5 | Honore’s statistic | ||
4.6 | Type-token ratio | ||
Prosodic features | Voice activity-related | 5.1 | Response time |
features | |||
5.2 | Response length | ||
5.3 | Silence ratio | ||
5.4 | Silence to utt. ratio | ||
5.5 | Long silence ratio | ||
5.6 | Avg. silence count | ||
5.7 | Silence rate | ||
5.8 | Cont. speech rate | ||
5.9 | Avg. cont. word count | ||
Articulation-related | 6.1 | Avg. abs. delta energy | |
features | |||
6.2 | Dev. of abs. delta energy | ||
6.3 | Avg. abs. delta pitch | ||
6.4 | Dev. of abs. delta pitch | ||
6.5.1 | Avg. abs. delta formant 1 | ||
6.5.2 | Avg. abs. delta formant 2 | ||
6.5.3 | Avg. abs. delta formant 3 | ||
6.5.4 | Avg. abs. delta formant 4 | ||
6.6 | Voicing ratio | ||
Rate of speech-related | 7.1 | Phoneme rate | |
features | |||
7.2 | Word rate |