13. Instead, the studies ended up giving their name to the "Hawthorne effect", the extremely influential idea that the very act of being experimented upon changes subjects’ behavior.

14. Accoding to accounts of the experiments, their hourly output rose when lighting was increasd, but also it was dimmed.

15. An awareness that they were being experimentedupon seemed to be enough to alter workers’sbehavior by itself.

16. Contrary to the description on record, nosystematic evidence was found that levels of productivity were related to changes inlighting.

考研英语长难句解析：

第13题：

【分析】复合句。句子主干为 the studies ended up giving their name to the "Hawthorne effect"。the extremely influential idea...补充说明 Hawthorne effect，是其同位语，其中 idea 之后是 that 引导的同位语从句。同位语从句中，主句为 the very act，of being experimented upon 是其后置定语，谓语为 changes，宾语是 subjects’ behavior。

【译文】然而，这些研究最终以被冠之为"霍桑效应"的概念而告终，这个极具影响力的概念认为，仅仅是接受实验这一行为就足以使受试者的表现发生改变。

【点拨】1)subject 作名词时，是"主题、学科、对象、主语"的意思，结合语境，本句中意为"接受实验对象，受试者"。作动词时，意为"使服从;使遭受"，常与 to 搭配。作形容词时，意为"受...支配的;易遭...的"。

2)end up doing sth."结果是...，最终..."