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

本研究的目的是探讨一种有效的教育方法，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成绩的差异。一组(六年级)是30名完成牙科技术培训的学生。另一组(一年级)是30名未受过技术培训的学生。第一年：使用患者的口腔照片和全景X线片作为刺激。在记录眼球运动后，进行内省评议和模型对照测试。第二年和第三年：以1例上颌前突患者、1例下颌前突患者、1例开放咬合患者和1例正常骨骼患者的头颅侧位片为刺激。记录眼动后，进行内省评语和面部照片对照测试，结果如下：1.与传统的口试和笔试方法相比，该计算机眼动分析系统能有效地评估视觉搜索成绩。搜索策略对于有效的信息处理非常重要。完成牙科技术培训的学生准确地凝视着重要的诊断区域。因此，我们认为有效的学习会影响有效的信息处理。从这些结果可以得出结论，为了进行有效的教育，对于重要诊断区域的信息处理的搜索策略是必要的。

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.