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Investigating Halo and Ceiling Effects in Student Evaluations of Instruction

机译:在学生评估教学中研究光环和天花板效应

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摘要

Many measurement biases affect student evaluations of instruction (SEIs). However, two have been relatively understudied: halo effects and ceiling/floor effects. This study examined these effects in two ways. To examine the halo effect, using a videotaped lecture, we manipulated specific teacher behaviors to be "good" or "bad" based on specific items on the evaluation form (the Teacher Behavior Checklist). To examine ceiling/floor effects, we expanded the standard 5-point rating to either 7 or 9 points. Across three universities, 537 students watched and rated the videotaped lecture. Both biases were robust and remained despite characteristics of the measure designed to combat them. Instead, direct instruction regarding how to use the evaluation forms seems to be necessary to limit these biases on ratings.
机译:许多测量偏差会影响学生对教学的评估(SEI)。但是,相对而言,有两个研究不足:光晕效果和天花板/地板效果。这项研究以两种方式检查了这些影响。为了检查光环效果,我们使用录像带讲座,根据评估表(“教师行为清单”)上的特定项目,将特定的教师行为操纵为“好”或“坏”。为了检查天花板/地板的效果,我们将标准的5分等级扩展为7或9分。在三所大学中,有537名学生观看并评价了录像带的演讲。尽管有针对性地采取了措施,但两种偏见均很强劲,并且仍然存在。取而代之的是,直接使用有关如何使用评估表的指示似乎是必要的,以限制这些对评分的偏见。

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