Department of Medical Imaging, Ottawa Hospital Research Institute, Ottawa, Canada.
BMC Med Educ. 2014 Feb 1;14:22. doi: 10.1186/1472-6920-14-22.
Little objective evidence exists regarding what makes a good lecture. Our purpose was to determine qualities of radiology review course lectures that are associated with positive audience evaluation.
57 presentations from the Ottawa Resident Review Course (2012) were analyzed by a PGY4 radiology resident blinded to the result of audience evaluation. Objective data extracted were: slides per minute, lines of text per text slide, words per text slide, cases per minute, images per minute, images per case, number of audience laughs, number of questions posed to the audience, number of summaries, inclusion of learning objectives, ending on time, use of pre/post-test and use of special effects. Mean audience evaluation scores for each talk from daily audience evaluations (up to 60 per talk) were standardized out of 100. Correlation coefficient was calculated between continuous variables and audience evaluation scores. Student T test was performed on categorical variables and audience evaluation scores.
Strongest positive association with audience evaluation scores was for image quality (r = 0.57) and number of times the audience laughed (r = 0.3). Strongest negative association was between images per case and audience scores (r = -0.25). Talks with special effects were rated better (mean score 94.3 vs. 87.1, p < 0.001). Talks with the highest image quality were rated better (mean score 94.1 vs. 87.5, p < 0.001). Talks which contained a pre/post-test were rated better (mean score 92 vs. 87.8, p = 0.004).
Many factors go into making a great review course lecture. At the University of Ottawa Resident Review Course, high quality images, use of special effects, use of pre/post-test and humor were most strongly associated with high audience evaluation scores. High image volume per case may be negatively associated with audience evaluation scores.
关于什么样的讲座才称得上是好讲座,目前几乎没有客观的证据。我们的目的是确定放射学复习课程讲座的特点,这些特点与听众的积极评价相关。
一位放射科住院医师 4 级(PGY4)对渥太华住院医师复习课程(2012 年)的 57 次演讲进行了分析,该住院医师对听众评估的结果并不知情。提取的客观数据包括:每分钟幻灯片数、文本幻灯片每行文本数、文本幻灯片字数、每分钟病例数、每分钟图像数、每个病例的图像数、听众笑声次数、向听众提出的问题数、总结数、学习目标的纳入、按时结束、使用前测/后测和使用特效。每次演讲的日常听众评估(每次演讲最多 60 次)的平均听众评估得分标准化为 100 分。对连续变量和听众评估得分进行相关系数计算。对分类变量和听众评估得分进行学生 T 检验。
与听众评估得分呈最强正相关的是图像质量(r = 0.57)和听众笑声次数(r = 0.3)。与听众评分呈最强负相关的是每个病例的图像数(r = -0.25)。使用特效的演讲评分更高(平均得分 94.3 分 vs. 87.1 分,p < 0.001)。图像质量最高的演讲评分更高(平均得分 94.1 分 vs. 87.5 分,p < 0.001)。包含前测/后测的演讲评分更高(平均得分 92 分 vs. 87.8 分,p = 0.004)。
要成为一堂优秀的复习课程讲座,需要考虑许多因素。在渥太华大学住院医师复习课程中,高质量的图像、使用特效、使用前测/后测和幽默与听众的高评价得分最密切相关。每个病例的图像数量过多可能与听众评价得分呈负相关。