Autonomous collaborative learning in English writing at university: Construction and evaluation of multilevel digital portfolios

在线对英语写作进行自我评价和同行评价，并将评价结果以多级数字作品集的形式记录在新建的WebDAV系统上。MAHARA还作为一个有效搜索和查看投资组合的系统被引入。在组合描述中，采用文本挖掘和案例分析的定性研究方法，分析了策略、协同元认知、自我效能感的时序变化和关系。该研究还通过问卷调查和Coh-Metrix项目的写作表现的发展，定量地检查了策略使用和自我效能的改善。最后结合定性研究，阐述了多层次卷宗在支持大学写作自主协作学习中的有效性。

Self-evaluation and peer-evaluation of English writing were conducted online,and the results were recorded as multilevel digital portfolios on a newly constructed WebDAV system.MAHARA was also introduced as a system to search and view the portfolios effectively. In the descriptions of the portfolios, time-series changes and relationships in strategies, collaborative metacognition, self-efficacy were analyzed by employing text mining and case study as a qualitative research method. The study also quantitatively examined the improvement of strategy use and self-efficacy, based on questionnaires and the development of writing performance with the Coh-Metrix program.It finally elucidated the effectiveness of the multilevel portfolios in the support of autonomous collaborative learning of writing at university in conjunction with qualitative research.