An object of the present invention is to easily and efficiently evaluate the effectiveness of a sample for cognitive decline caused by a work load, and to promote the design and development of a product containing a green tea component as an active component. Kind Code: A1 A test that employs at least one of a Stroop test, a facial expression recognition test, and a four-part continuous processing test in a cognitive track test as a predetermined evaluation test and performs a predetermined evaluation on a subject who has been subjected to a predetermined work load. The test is performed and the subject is allowed to ingest the sample containing the green tea component for at least two weeks. After subjecting the sample after ingesting the sample, a predetermined evaluation test is performed again after a predetermined work load is applied, and the cognitive function deterioration accompanying the work load is determined by comparing the results of the predetermined evaluation test before and after the sample is taken. To evaluate the inhibitory effect of green tea components on the green tea. [Selection diagram] None【課題】作業負荷に伴う認知機能低下に対するサンプルの有効性を簡便且つ効率的に評価し、緑茶成分を有効成分とする製品の設計、開発を促進する。【解決手段】コグニトラックス検査におけるストループテスト、表情認知テスト及び４パート持続処理テストのうちの少なくとも１つのテストを所定の評価検査として採用し、所定の作業負荷を与えた被験者に対して所定の評価検査を行い、少なくとも２週間、被験者に緑茶成分を含むサンプルを摂取させる。サンプルを摂取した後の被験者に対して、所定の作業負荷を与えた後に所定の評価検査を再度行って、サンプルの摂取前後における所定の評価検査の結果の対比によって、作業負荷に伴う認知機能低下に対する緑茶成分による抑制効果を評価する。【選択図】なし
