刘博士他们的研究小组，从2003年开始，在全国300多所电影课试验学校中，选择了50所学校，进行抽样跟踪分析。
Doctor Liu's research group chosen 50 schools in more than 300 movie-experimental schools in the whole country, and does the sampling and tracing analysis.
五十所学校的学生将作为这些新教学法的试验对象。
Students in fifty schools are to act as guinea pigs for these new teaching methods.
这项研究涵盖了参加“目标追踪计划”项目的学校中的386名幼儿园学童，该项目是一个美国的多点临床试验项目，从1991年开始追踪儿童一生的发展情况。
The study included 386 kindergarteners from schools in the Fast Track Project, a multi-site clinical trial in the U. S. that in 1991 began tracking how children developed across their lives.
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