Two trials examined military recruits and the third studied boys from "lower wage-earning classes" attending a boarding school in the UK during World War II.
其中两篇试验以入伍新兵为研究对象，而第三篇的研究对象则来自于二次世界大战期间就读于英国某所住宿学校的“低收入户”男童。
Two trials examined military recruits and the third studied boys from "lower wage-earning classes" attending a boarding school in the UK during World War II.
其中两篇试验以入伍新兵为研究对象，而第三篇的研究对象则来自于二次世界大战期间就读于英国某所住宿学校的“低收入户”男童。
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