Table 5
Accuracy rates on the raw text documents of the TOEFL11 corpus (English L2) of various classification systems based on string kernels. The best accuracy rates on each set of experiments are highlighted in bold. The weights a1 and a2 from the weighted sums of kernels are computed by kernel alignment.
| Method | Dev | 10-fold CV | Test |
|---|---|---|---|
KRR and  | 86.3% | 82.6% | 82.8% |
KRR and  | 84.5% | 82.5% | 82.6% |
KRR and  | 79.9% | 77.9% | 77.6% |
KRR and  | 86.1% | 82.6% | 83.1% |
KRR and  | 84.9% | 82.4% | 82.1% |
KRR and  | 85.6% | 82.9% | 82.6% |
KRR and  | 85.6% | 82.9% | 82.6% |
KDA and  | 86.2% | 83.7% | 84.6% |
KDA and  | 85.2% | 83.6% | 84.3% |
KDA and  | 81.2% | 79.1% | 79.6% |
KDA and  | 86.6% | 83.9% | 84.7% |
KDA and  | 85.9% | 83.5% | 83.9% |
KDA and  | 85.9% | 84.1% | 85.1% |
KDA and  | 86.1% | 84.1% | 85.3% |
KDA and  | 86.7% | 84.0% | 84.9% |
| Method | Dev | 10-fold CV | Test |
|---|---|---|---|
| KRR and | 86.3% | 82.6% | 82.8% |
| KRR and | 84.5% | 82.5% | 82.6% |
| KRR and | 79.9% | 77.9% | 77.6% |
| KRR and | 86.1% | 82.6% | 83.1% |
| KRR and | 84.9% | 82.4% | 82.1% |
| KRR and | 85.6% | 82.9% | 82.6% |
| KRR and | 85.6% | 82.9% | 82.6% |
| KDA and | 86.2% | 83.7% | 84.6% |
| KDA and | 85.2% | 83.6% | 84.3% |
| KDA and | 81.2% | 79.1% | 79.6% |
| KDA and | 86.6% | 83.9% | 84.7% |
| KDA and | 85.9% | 83.5% | 83.9% |
| KDA and | 85.9% | 84.1% | 85.1% |
| KDA and | 86.1% | 84.1% | 85.3% |
| KDA and | 86.7% | 84.0% | 84.9% |