Translation of "empiric" into Japanese

The concerns are substantiated by empirical verification through a review of literature.

そして文献を見直して、実証的な検証を行うことによって生じる懸念事項を提案する。

However, there were very few studies that empirically compared these assertions.

しかしながら、この経験的な検証の比較研究はわずかしか行われていない。