The Development of a Student-Led CALL System Which Enables Pronouncing Correction through Visual Symbols

本报告研究开发了一种以学生为主导的语音辅助教学系统，该系统以CAI （Computer Assisted Instruction，计算机辅助教学）为基础，作为一种个人学习辅助系统，牢固地建立在教育现场，具有良好的可操作性，并能进行语音纠正教学。所开发的CALL系统具有以下特点：听觉信息与视觉信息的补充：视觉表达是一种能够以图像的形式被捕捉并具有良好记忆力的表达。学生反复训练口语和听力信息，第三方（教师）对训练结果进行评价，评价结果通过将学生的语音数据添加到视觉符号（音调符号）中反馈给学生。这个过程可以使学生直观地抓住客观的发音评价，加深理解。学生主导型：对于传统的LL设备，教师通过切换操作直接与学生连接，对学生的发音进行聆听和评价。这会导致学生因老师的打断而感到焦虑或不满，或者对学生的发音进行不可接受的评价。这个系统可以看作是学生反复训练和理解发音，然后向老师要求评价，以消除一种学习焦虑的系统。学习和纠错教学不分时间和空间：学生意向传递的语音数据一次存储到数据库中。教师可以在课余时间对语音数据进行纠正和教学，学生也可以随时从数据库中查看评价结果。然后，将学生传输的语音数据与评价结果合并为一个整体，呈现给能够记忆的学生，无论时间如何流逝，都能再现当时的学校情况。

This reports relates to the research and development of a student-led CALL system which is based upon the CAI (Computer Assisted Instruction) being firmly established in an educational site as an individual learning assisted system, has excellent operability, and enables pronouncing correction teaching.The developed CALL system has the following features ;1. A supplementation of audio information with visual information :Visual expression is one whose can be caught as an image and which has excellent memory. The student repetitively trains speaking and hearing information, the third party (teacher) evaluates the training result, and the evaluation result is fed back to the student by adding the voice data of the student to a visual symbol (tone symbol). This process enables the student to visually catch on objective pronouncing evaluation and deepen his understanding.2. Student-led type :For the conventional LL equipment, the teacher directly connects to students through switching operation and hears and evaluates the pronunciation of the student. This causes the student to be anxious or dissatisfied due to the interruption of the teacher, or the evaluation of an unacceptable pronunciation of the student.This system can be considered as a system where the student repetitively trains and understands the pronunciation, and thereafter requests the evaluation to the teacher to eliminate a learning anxiety.3. Learning and corrective teaching regardless of time and space :The voice data transmitted by the intention of the student is once stored into data-base. The teacher can correct the voice data and teach the student also out of school hours and the student can see the evaluation result from the data-base at any time. Then, the voice data transmitted by the student and the evaluation result are incorporated to a unity and presented to the student who can remember, regardless of an elapse of time, and reproduce the school situation at that time.