Student response systems are commonly used in combination with peer discussions during lectures. Research has shown that the number of correct answers increases when the same question is re-asked after discussion. This may occur because unconfident students copy the answer from their peers. To preclude this, the authors added a second, similar question to answer individually, disguised as a new case. The authors found a Cohen’s d effect size of 0.66 (N: 147) for eight valid interventions which is 65 percent above the average effect of interventions aimed at increasing student performance.

中文翻译：

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同行讨论和应对技术：短期干预，可观的收获

学生反应系统通常与讲座期间的同伴讨论结合使用。研究表明，在讨论后重新提出同一问题时，正确答案的数量会增加。这可能是因为不自信的学生抄袭了同龄人的答案。为了排除这种情况，作者添加了第二个类似的问题来单独回答，伪装成一个新案例。作者发现八项有效干预措施的 Cohen d 效应大小为 0.66（N：147），比旨在提高学生表现的干预措施的平均效果高 65%。