Micro-level activity patterns of children and the potential exposure patterns to chemicals from oil spills

For approximately one hour, 122 children were videotaped across 4 beaches to observe the activities. Using Videotraq software, developed at Stanford University, the videos were translated into text files of activities by the second within the hour. A text file was created for each beach location. Within these text files, activities were identified including the activity the children engaged in, objects and surfaces the children came into contact with using their hands, and objects and surface the children contacted with the mouth and their hands. Inter-observer agreement was measured on some translated files to maintain quality of translation.

本研究在4处海滩对122名儿童开展了总计约1小时的录像采集，以观测其行为活动。研究采用斯坦福大学开发的Videotraq软件，将每一小时内的录像按秒级精度转换为活动记录文本文件。每一处海滩对应生成一个专属活动文本文件。在上述文本文件中，已完成多维度活动标注，涵盖儿童参与的行为活动、儿童手部接触的物品与接触表面，以及儿童经口部与手部接触的物品及接触表面。为保障标注质量，研究针对部分转换后的文本文件开展了观察者间一致性检验。