This study examines the effects of a 1‐day pilot training program on ethnic/racial bias in police use of stop and search powers, using a randomized controlled trial in six diverse agencies in England. We theorized the training could reduce officer bias by improving their competence to apply legitimate criteria in search decisions, and/or by reducing their reliance on ethnic/racial stereotypes. Survey results showed the training improved officers’ knowledge of stop and search regulations, made them more selective in declared search intentions in hypothetical scenarios, and reduced their support for ethnic/racial stereotyping in policing. While it showed no effects on the ethnic/racial patterns of search intentions in survey scenarios, there was no survey evidence of bias against black people in the scenarios, even in the absence of training. Police search records revealed no clear training effects on recorded street‐level behaviors, whether in relation to the frequency of searches, the strength of grounds for suspicion, or their ethnic/racial patterning.

中文翻译：

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警察培训可以减少在停留和搜查中的种族/种族差异吗？来自英国多站点试验的证据

这项研究使用英格兰六个不同机构的随机对照试验，研究了为期1天的飞行员培训计划对警察使用停车和搜查权时种族/种族偏见的影响。我们从理论上讲，培训可以通过提高人员在搜索决策中应用合法标准的能力和/或减少人员对种族/种族刻板印象的依赖来减轻人员的偏见。调查结果表明，培训提高了警官对停火和搜查规则的了解，使他们在假设的情境中对宣布的搜查意图更有选择性，并减少了他们对警务中种族/种族定型观念的支持。尽管它在调查场景中对搜索意图的种族/种族模式没有影响，但是，即使没有培训，也没有调查证据表明在该场景中偏向黑人。