An Empirical Study of Incorporating Pseudo Datainto Grammatical Error Correction
Table 2: Performance of models on BEA-valid: a value in bold indicates the best result within the column. The seed corpus T is SimpleWiki.
['Method', 'Prec.', 'Rec.', 'F0.5']
Backtrans (noisy) and Backtrans (sample) show competitive values of F0.5. Given this result, we exclusively use Backtrans (noisy) and discard Backtrans (sample) for the rest of the experiments. The advantage of Backtrans (noisy) is that its effectiveness in GEC has already been demonstrated by Xie et al. In addition, in our preliminary experiment, Backtrans (noisy) decoded ungrammatical sentence 1.2 times faster than Backtrans (sample) did. We also use DirectNoise because it achieved the best value of F0.5 among all the methods.