Little is known about officer perceptions of body-worn cameras (BWCs), and whether perceptions change following implementation within their agencies. BWC deployment varies, with some agencies mandating officers to wear BWCs and others using volunteers. Researchers have yet to assess attitudinal differences between volunteers and mandated officers. This study addresses these gaps using data from an evaluation of BWCs in the Phoenix Police Department to examine officer perceptions of the utility of BWCs, perceptions of organizational justice, and support for using procedural justice. We use inverse propensity weighted difference-in-difference models to examine changes in officer perceptions over time between randomly selected officers who were mandated to wear a BWC, BWC volunteers, officers who resisted BWCs, and control officers. We identified limited significant differences in perceptions of BWCs over time, though effect sizes suggest that BWC volunteers and mandated officers were more subdued in their expectations about BWCs at the posttest.

对于军官对随身摄像机（BWC）的感知以及感知在其机构内实施后是否会改变，人们知之甚少。《生物武器公约》的部署各不相同，有些机构要求官员佩戴生物武器公约，而另一些则使用志愿者。研究人员尚未评估志愿者和受命官员之间的态度差异。这项研究使用来自凤凰城警察局对BWC的评估数据来解决这些差距，以检查官员对BWC的效用的看法，对组织正义的看法以及对使用程序正义的支持。我们使用倾向加权加权差异模型来检查在随机选择的被任命穿BWC的军官，BWC志愿者，抵抗BWC的军官和控制官之间的官兵观念随时间的变化。