Table 5 Accuracy (%) of each classifier using the prosodic features in age-controlled experiments
Age between 60 and 75 | Age between 76 and 90 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
( p = 15, c = 25) | ( p = 13, c = 26) | ||||||||||
ID | Features | SVM | Bayes | CTree | N | p-value | SVM | Bayes | CTree | NN | p-value |
5.1 | Response time | 60.0 | 60.0 | 52.5 | 45.0 | 0.206 | 61.5 | 59.0 | 48.7 | 48.7 | 0.150 |
5.2 | Response length | 62.5 | 57.5 | 52.5 | 65.0 | 0.058 | 66.7 | 41.0 | 51.3 | 61.5 | 0.037 |
5.3 | Silence tatio | 70.0 | 70.0 | 62.5 | 72.5 | 0.004 | 94.9 | 94.9 | 94.9 | 84.6 | <0.001 |
5.4 | Silence to Utt. ratio | 67.5 | 65.0 | 60.0 | 62.5 | 0.027 | 76.9 | 71.8 | 69.2 | 59.0 | 0.001 |
5.5 | Long silence ratio | 57.5 | 70.0 | 57.5 | 55.0 | 0.011 | 74.4 | 74.4 | 69.2 | 69.2 | 0.002 |
5.6 | Avg. silence count | 82.5 | 80.0 | 82.5 | 80.0 | <0.001 | 74.4 | 74.4 | 64.1 | 59.0 | 0.002 |
5.7 | Silence rate | 67.5 | 75.0 | 62.5 | 72.5 | 0.002 | 74.4 | 79.5 | 74.4 | 59.0 | <0.001 |
5.8 | Cont. speech rate | 80.0 | 80.0 | 75.0 | 75.0 | <0.001 | 74.4 | 71.8 | 66.7 | 64.1 | 0.002 |
5.9 | Avg. cont. word count | 67.5 | 62.5 | 60.0 | 55.0 | 0.027 | 87.2 | 92.3 | 94.9 | 84.6 | <0.001 |
6.1 | Avg. abs. delta energy | 67.5 | 75.0 | 67.5 | 57.5 | 0.002 | 71.8 | 71.8 | 79.5 | 64.1 | <0.001 |
6.2 | Dev. of abs. delta energy | 75.0 | 72.5 | 62.5 | 55.0 | 0.002 | 69.2 | 71.8 | 41.0 | 51.3 | 0.006 |
6.3 | Avg. abs. delta pitch | 67.5 | 62.5 | 55.0 | 47.5 | 0.027 | 61.5 | 82.1 | 59.0 | 64.1 | <0.001 |
6.4 | Dev. of abs. delta pitch | 45.0 | 55.0 | 55.0 | 72.5 | 0.004 | 59.0 | 69.2 | 56.4 | 56.4 | 0.016 |
6.5.1 | Avg. abs. delta formant 1 | 62.5 | 57.5 | 55.0 | 62.5 | 0.114 | 74.4 | 71.8 | 69.2 | 61.5 | 0.002 |
6.5.2 | Avg. abs. delta formant 2 | 55.0 | 62.5 | 52.5 | 52.5 | 0.114 | 69.2 | 66.7 | 66.7 | 71.8 | 0.006 |
6.5.3 | Avg. abs. delta formant 3 | 52.5 | 47.5 | 62.5 | 55.0 | 0.114 | 66.7 | 66.7 | 76.9 | 59.0 | 0.001 |
6.5.4 | Avg. abs. delta formant 4 | 45.0 | 65.0 | 55.0 | 57.5 | 0.002 | 74.4 | 76.9 | 66.7 | 69.2 | 0.001 |
6.6 | Voicing ratio | 75.0 | 75.0 | 62.5 | 75.0 | 0.002 | 59.0 | 59.0 | 53.9 | 43.6 | 0.262 |
7.1 | Phoneme rate | 67.5 | 75.0 | 77.5 | 60.0 | 0.001 | 82.1 | 82.1 | 76.9 | 58.0 | <0.001 |
7.2 | Word rate | 72.5 | 72.5 | 67.5 | 60.0 | 0.004 | 56.4 | 61.6 | 66.7 | 48.7 | 0.037 |