Subject characteristics.
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https://figshare.com/articles/dataset/_Subject_characteristics_/1440003
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资源简介：
Caffeine consumption levels were estimated via paper and pencil survey. Subjects were asked to indicate how many servings of commonly-ingested caffeine substances they consume during an average week, as well as any other substances they regularly consume which might contain caffeine. Subjects were also asked to indicate the number of hours they slept overnight between Day 1 and 2 testing, and rated their sleep quality using a 5-point scale (1 = poor sleep quality; 5 = excellent sleep quality).
Subject characteristics.
创建时间：
2015-12-03
