OBJECTIVE We assessed how police officers' review of body-worn camera (BWC) footage, either before or after writing an initial report, affects subsequent police reports. HYPOTHESES We had competing hypotheses regarding the effect of BWC footage review before writing a police report on the total amount of information reported (Hypothesis 1) but expected it to increase "on-camera" details while reducing "off-camera" details (Hypothesis 2) and increase the accuracy of reports (Hypothesis 3). We predicted that footage review after writing an initial report would result in more complete and more accurate revised reports (Hypothesis 4). METHOD We conducted a field experiment with 102 Dutch police officers taking part in a training exercise in which they responded, in pairs, to an emergency call about physical abuse. One of the pair members wore a BWC. After interacting with and arresting the suspect, the officers went into separate rooms to write individual police reports. One pair member first watched the BWC footage and then wrote the report (watch first condition); the other pair member first wrote the report, then watched the footage and could revise the original report (write first condition). RESULTS Surprisingly, reports in the watch first condition did not differ significantly in amount, observability on footage, or accuracy from original or revised reports in the write first condition. However, police officers in the write first condition significantly improved both the amount and accuracy of their reports after footage review, though effect sizes were small (amount: d = .13, 95% CI [.08, .18]; accuracy: d = .20, [.05, .36]). CONCLUSIONS We recommend that police officers watch BWC footage only after they have written down their memories of the incident. If they revise their report after watching the footage, they should clearly identify the revisions made alongside the source of those revisions. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译：

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看还是不看：在查看随身携带的摄像机镜头时，可以改善警方的报告。

目标 我们评估了警官在撰写初步报告之前或之后对随身摄像机 (BWC) 镜头的审查如何影响随后的警方报告。假设 在就报告的信息总量（假设 1）撰写警方报告之前，我们对 BWC 镜头审查的效果提出了相互竞争的假设，但预计它会增加“相机内”细节，同时减少“相机外”细节（假设 2） ) 并提高报告的准确性（假设 3）。我们预测，在编写初始报告后对镜头进行审查将导致更完整和更准确的修订报告（假设 4）。方法 我们对 102 名荷兰警察进行了实地实验，他们参加了一项培训演习，他们成对地响应了关于身体虐待的紧急呼叫。这对成员中的一个穿着BWC。在与嫌疑人互动并逮捕嫌疑人后，警察进入不同的房间写个别的警察报告。一对成员先看了BWC的镜头，然后写了报告（先看条件）；另一对成员先写报告，然后观看录像，可以修改原始报告（写第一个条件）。结果 令人惊讶的是，先观察条件下的报告在数量、镜头可观察性或准确性方面与先写条件下的原始或修订报告没有显着差异。然而，先写条件下的警官在审查录像后显着提高了他们报告的数量和准确性，尽管效果很小（数量：d = .13, 95% CI [.08, .18]；准确性：d = .20，[.05，.36]）。结论 我们建议警察在写下他们对事件的记忆后才观看 BWC 录像。如果他们在观看录像后修改报告，他们应该清楚地识别这些修改的来源以及所做的修改。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。