Why use 5 times more unlabeled data?

[HeewonChung92]

I read the paper.
Question about Appendices E3: Effect of Unlabeled Data amount.

The results of CE+Du are 21.75, 20.35, 18.36, and 16.88 about {0.5x, 1x, 5x, 10x}.
The result of 10x is better than 5x more unlabeled data.
But in this paper selected 5 times.

Is there a reason?

[YyzHarry]

Hi, thank you for your interest. There is no specific reason --- In the main paper, the result mainly focuses on the effect of imbalanceness of labeled/unlabeled data, and the amount of unlabeled data is a control variable (thus fixed), so we just pick one random value as 5x.