图示化学习工具促进知能发展的学习行为模式分析

Research on Learning Behavior Pattern Analysis of Expertise Development Facilitated by a Visualization-Learning Tool

计算机图示化工具可以帮助学习者将内隐的问题解决和知识建构过程显性化，是促进知识技能发展的有效方式，也为分析评价知能水平提供了新的视角。作为学习分析的一种具体体现，分析学习者使用图示化工具的行为模式，有助于深入理解知能水平的成因并提供有针对性的学习支架。本研究提出利用序列分析方法，对图示化学习过程数据进行分析，探究能够促进知能发展的图示化学习行为模式。本文以医学教育中的临床诊断知识技能培训为例，介绍一种用于问题导向学习(PBL)的在线图示化学习工具，并通过分析学生的图示化学习过程数据，比较学习表现较好和较差的学生在图示化学习行为模式上的差异。研究发现，学习表现较好的学生具有“概念建构—假设提出—推理论证冶三循环的学习行为模式，反映其较强的知识抽象概括能力和面向问题解决过程的、有目的的知识建构能力。分析结果表明，该图示化学习行为模式，对于促进专业知能发展有重要作用。

In various professional domains such as medicine， law， education， and computer engineering， how those domain novices can grow up to become experts remains unclear. Researchers agreed that a learner should keep deepening his or her domain knowledge， understanding and sharpening problem-solving skills ( Ericsson， 2008; Lajoie， 2003). They argued that professional expertise development lies in the interaction between two complex cognitive activities， i. e. ， knowledge construction and problem solving. However， these two activities are implicit， which often becom-esan obstacle for evaluation and facilitation of expertise development. To overcome this challenge， a computer-supported visualization tool can help learners externalize cognitive activities during learning， which in turn， is an effective way to facilitate expertise development and also a new perspective to assess professional expertise. As a typical example of learning analytics， a learner s behavior mode in a visualization-learning environment can help shed light on the development of professional expertise and provide effective scaffolds. Therefore， the focus of this study was to design an innovative approach to investigate the learning behavior pattern of expertise development. First， this study designed a visualization tool called dual-mapping tool that includes a concept map to represent knowledge construction process and an argument map to represent problem-solving process during learning. Second， as learning analytics method is concerned， this study proposed to use a sequential analysis approach to analyze visualization-based learning process data and explore the learning patterns in support of expertise development. Clinical diagnostic problem solving in medical education was selected as an example to justify the effectiveness of this learning analytics approach on visualization learning. This study recruited 14 medical students from a medical school in Shanghai for one-month online learning during their spare time and introduced the dual -mapping learning tool in support of their medical problem -based learning (PBL). Participants were required to solve four authentic kidney-related problems online and constructed four dual-maps respectively. Dual-mapping learning products were rated by domain experts and classified into either good or bad performance groups. Further， online visualization learning behavior was analyzed to explore the learning behavior patterns and to compare the differences in learning patterns between good and bad performance group. The study found that learners with good learning performance showeda unique learning pattern of a three-step cycle， i. e. ， concept elicitation-hypothesis generation-reasoning& justification， which suggests their better abilities in knowledge summarization and problem-solving-oriented knowledge construction during learning. The finding suggests this specific visualization-learning behavior pattern may facilitate expertise development. Implications and directions for fur their study were discussed at the end.