Various workplace-based assessment tools are available, but none have been shown to improve performance in procedural skills. This study aimed to assess the impact of using one such tool, cumulative sum charts, on procedural skill ability. A single-blind randomised controlled trial was conducted on 82 final year medical students. Control group students received the usual teaching; in addition to this, intervention group students were provided with cumulative sum charts to log their cannulation attempts over a 7-month period. At the end of the year, students from both groups undertook a validated test of automaticity of cannulation skill. Students in the intervention group obtained median (IQR [range]) scores of 68.2 (60.5-74.3 [42.7-81.1]) vs 62.2 (52.2-68.8 [40.7-80.5]) for the control group (p = 0.013). The effect size was moderate (Cohen's d = 0.608). This study therefore provides support for the hypothesis that use of cumulative sum charts improves performance when learning procedural skills. Anaesthesia
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机译：可以使用各种基于工作场所的评估工具，但没有一种工具可以提高程序技能的表现。这项研究旨在评估使用这样一种工具（累积总和图）对程序技能的影响。对82名最后一年的医学生进行了单盲随机对照试验。对照组学生接受常规教学。除此之外，为干预组的学生提供了累积总数图，以记录他们在7个月内的插管尝试次数。年底，两组学生都进行了一项经过验证的插管技巧自动性测试。干预组的学生获得的中位（IQR [范围]）分数为对照组的68.2（60.5-74.3 [42.7-81.1]）和62.2（52.2-68.8 [40.7-80.5]）（p = 0.013）。效果大小适中（Cohen d = 0.608）。因此，本研究为以下假设提供了支持：使用累积总和图可以提高学习过程技能时的性能。麻醉
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