Nance Elizabeth T, Lanning Sharon K, Gunsolley John C
Department of General Practice, School of Dentistry, Virginia Commonwealth University, Richmond, VA 23298-0566, USA.
J Dent Educ. 2009 Aug;73(8):972-9.
The purpose of this study was to compare the performance of students exposed to two different instructional modalities for dental anatomy wax carving: CAI (computer-assisted instruction) using DVD technology, or traditional laboratory instruction. Students' self-assessment scores were also compared to faculty scores, and students' perceptions of their teaching modality were analyzed. Seventy-three first-year dental students (response rate 81 percent) participated in this randomized single blind trial, in which faculty graders were blinded to student group assignment. There were no statistical differences, as determined by the Wilcoxon non-parametric test and a t-test, between the faculty grades on the wax carving from the two teaching methods the students experienced. The student self-assessments revealed higher mean grades (3.0 for the DVD-only group and 3.1 for the traditional group) than the faculty actual mean grades (2.2 for both the DVD-only group and the traditional group) by almost one grade level on a 4.0 grade scale. Similar percentages of students in the traditional group had either favorable or unfavorable perceptions of their learning experience, while more students in the DVD-only group reported favorable perceptions. Students from both groups said they wanted more faculty feedback in the course. Based on these objective and subjective data, merging CAI and traditional laboratory teaching may best enhance student learning needs.
使用DVD技术的计算机辅助教学（CAI）或传统的实验室教学。还比较了学生的自我评估分数与教师分数，并分析了学生对其教学方式的看法。73名一年级牙科学生（回复率81%）参与了这项随机单盲试验，其中教师评分者对学生分组情况不知情。根据Wilcoxon非参数检验和t检验，学生经历的两种教学方法在蜡型雕刻方面的教师评分之间没有统计学差异。学生自我评估显示，在4.0分制中，平均成绩（仅DVD组为3.0分，传统组为3.1分）比教师实际平均成绩（仅DVD组和传统组均为2.2分）高出近一个等级。传统组中对学习经历持正面或负面看法的学生比例相似，而仅DVD组中有更多学生报告持正面看法。两组学生都表示他们希望在课程中得到更多教师反馈。基于这些客观和主观数据，将计算机辅助教学与传统实验室教学相结合可能最能满足学生的学习需求。
