Table 7 Accuracy (%) of each classifier using the prosodic features in education-controlled experiments
High school and below | College and above | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
( p = 18, c = 24) | ( p = 10, c = 27) | ||||||||||
ID | Features | SVM | Bayes | CTree | NN | p value | SVM | Bayes | CTree | NN | p value |
5.1 | Response time | 52.4 | 61.9 | 54.8 | 69.1 | 0.014 | 70.3 | 59.5 | 62.2 | 54.1 | 0.014 |
5.2 | Response length | 47.6 | 42.9 | 38.1 | 42.9 | 1.000 | 73.0 | 51.4 | 46.0 | 67.6 | 0.005 |
5.3 | Silence ratio | 73.8 | 71.4 | 64.3 | 73.8 | 0.002 | 91.9 | 97.3 | 94.6 | 91.9 | <0.001 |
5.4 | Silence to utt. ratio | 69.1 | 69.0 | 57.1 | 59.5 | 0.014 | 83.8 | 81.1 | 73.0 | 75.7 | <0.001 |
5.5 | Long silence ratio | 64.3 | 66.7 | 59.5 | 66.7 | 0.031 | 70.3 | 78.4 | 54.1 | 51.4 | 0.001 |
5.6 | Avg. silence count | 83.3 | 85.7 | 83.3 | 71.4 | <0.001 | 75.7 | 70.3 | 73.0 | 67.6 | 0.002 |
5.7 | Silence rate | 66.7 | 73.8 | 83.3 | 76.2 | <0.001 | 75.7 | 62.2 | 78.4 | 59.5 | 0.001 |
5.8 | Cont. speech rate | 83.3 | 83.3 | 78.6 | 73.8 | <0.001 | 75.7 | 70.3 | 59.5 | 73.0 | 0.002 |
5.9 | Avg. cont. word count | 59.5 | 71.4 | 57.1 | 59.5 | 0.005 | 89.2 | 91.9 | 91.9 | 83.8 | <0.001 |
6.1 | Avg. abs. delta energy | 69.1 | 57.1 | 64.3 | 61.9 | 0.014 | 78.4 | 78.4 | 75.7 | 48.7 | 0.001 |
6.2 | Dev. of abs. delta energy | 69.1 | 66.7 | 50.0 | 42.9 | 0.014 | 73.0 | 75.7 | 59.5 | 56.8 | 0.002 |
6.3 | Avg. abs. delta pitch | 45.2 | 45.2 | 38.1 | 40.5 | 1.000 | 64.9 | 83.8 | 73.0 | 56.8 | <0.001 |
6.4 | Dev. of abs. delta pitch | 38.1 | 50.0 | 47.6 | 42.9 | 1.000 | 56.8 | 62.2 | 54.1 | 67.6 | 0.033 |
6.5.1 | Avg. abs. delta formant 1 | 61.9 | 64.3 | 61.9 | 61.9 | 0.064 | 67.6 | 64.9 | 48.7 | 46.0 | 0.033 |
6.5.2 | Avg. abs. delta formant 2 | 61.9 | 64.3 | 54.8 | 47.6 | 0.064 | 67.6 | 70.3 | 73.0 | 78.4 | 0.001 |
6.5.3 | Avg. abs. delta formant 3 | 57.1 | 47.6 | 35.7 | 38.1 | 0.355 | 75.7 | 62.2 | 64.9 | 62.3 | 0.002 |
6.5.4 | Avg. abs. delta formant 4 | 69.1 | 66.7 | 57.1 | 66.7 | 0.014 | 54.1 | 62.2 | 70.3 | 62.3 | 0.014 |
6.6 | Voicing ratio | 64.3 | 64.3 | 61.9 | 69.0 | 0.014 | 67.6 | 64.9 | 64.9 | 56.8 | 0.033 |
7.1 | Phoneme rate | 66.7 | 66.7 | 47.6 | 42.9 | 0.031 | 83.8 | 86.5 | 83.8 | 70.3 | <0.001 |
7.2 | Word rate | 66.7 | 64.3 | 61.9 | 66.7 | 0.031 | 64.9 | 73.0 | 81.1 | 64.9 | <0.001 |