Isolated experiments with readability features, TTR and OVIX. The subscript indicates the parameters found on IN2EN-dev and used for IN2EN-test. The scores that are statistically significantly better than ML2EN and IN2EN (p < 0.01, Collins' sign test) are shown in bold and are underlined, respectively.
| System . | n-gram precision . | BLEU . | |||
|---|---|---|---|---|---|
| 1-gr. . | 2-gr. . | 3-gr. . | 4-gr. . | ||
| ML2EN (baseline) | 48.34 | 19.22 | 9.54 | 4.98 | 14.50 |
| IN2EN (baseline) | 55.04 | 23.90 | 12.87 | 7.18 | 18.67 |
| DD:phrase4 | 57.14 | 26.49 | 14.72 | 8.49 | 20.85(10best) |
| DD:phrase4+morph | 57.35 | 26.71 | 14.92 | 8.63 | 21.07(10best) |
| DD:phrase4+ttr | 56.75 | 26.18 | 14.53 | 8.38 | 20.63(10best) |
| DD:phrase4+morph+ttr | 57.20 | 26.52 | 14.75 | 8.47 | 20.86(10best) |
| DD:phrase4+ovix | 57.05 | 26.30 | 14.59 | 8.39 | 20.70(10best) |
| DD:phrase4+morph+ovix | 57.12 | 26.44 | 14.64 | 8.39 | 20.75(5best) |
| System . | n-gram precision . | BLEU . | |||
|---|---|---|---|---|---|
| 1-gr. . | 2-gr. . | 3-gr. . | 4-gr. . | ||
| ML2EN (baseline) | 48.34 | 19.22 | 9.54 | 4.98 | 14.50 |
| IN2EN (baseline) | 55.04 | 23.90 | 12.87 | 7.18 | 18.67 |
| DD:phrase4 | 57.14 | 26.49 | 14.72 | 8.49 | 20.85(10best) |
| DD:phrase4+morph | 57.35 | 26.71 | 14.92 | 8.63 | 21.07(10best) |
| DD:phrase4+ttr | 56.75 | 26.18 | 14.53 | 8.38 | 20.63(10best) |
| DD:phrase4+morph+ttr | 57.20 | 26.52 | 14.75 | 8.47 | 20.86(10best) |
| DD:phrase4+ovix | 57.05 | 26.30 | 14.59 | 8.39 | 20.70(10best) |
| DD:phrase4+morph+ovix | 57.12 | 26.44 | 14.64 | 8.39 | 20.75(5best) |