Study on Information Processing in Visual-Search Performance for Orthodontic Diagnosis

本研究旨在探讨一种有效的教学方法，利用计算机眼动分析系统比较学生在正畸诊断中的视觉搜索表现。一组（六年级）是30名学生，他们完成了牙科技术培训。另一组（一年级）是30名没有受过技术培训的学生。第一年：患者的口腔照片和全景X线照片被用作刺激。第二年和第三年：上颌前突患者、下颌前突患者、开牙合患者和正常骨骼患者的头颅侧位片被用作刺激。在记录眼球运动后，进行了内省评论和面部照片的核对测试。与传统的口头和书面检查方法相比，这种计算机化的眼动分析系统可以有效地评估视觉搜索性能。搜索策略对有效的信息处理至关重要.完成牙科技术培训的学生准确地注视着重要的诊断区域。因此，研究者认为，有效的信息加工会影响学习效果，因此，为了有效地进行教育，有必要对重要诊断区域的信息加工进行搜索。

The purpose of this study was to investigate an effective educational method, comparing differences between students' visual-search performances for orthodontic diagnosis by using the computerized analytic system for the eye movement.In this study, Subjects were consisted of two groups. A group (sixth grade) was thirty students whose technical training in dentistry was finished. Another group (first grade) was thirty students whose technical training was not educated. The first year : Oral photographs and panoramic roentgenograms of a patient were used as stimuli. After recording eye movements, introspective comments and a collation test of cast models were performed.The second and third years : Lateral cephalograms of a maxillary protrusion patient, a mandibular prognathism patient, an open bite patient and a normal skeletal patient were used as stimuli. After recording eye movements, introspective comments and a collation test of facial photographs were performed.The results were as follows ;1. This computerized analytic system for the eye movement was effective to evaluate visual-search performance as compared with conventional oral and written examination methods.2. The search strategy was important to an efficient information processing.3. The students whose technical training in dentistry was finished gazed at significant diagnostic regions exactly. Therefore, it was suggested that an effect learning was affected to an efficient information processing.From these results, it was concluded that a search strategy for information processing of significant diagnostic regions would be necessary in order to carry out an efficient education.