This review systematically examines the literature exploring comprehension of a verbally presented police caution and the suggested factors influencing this, amongst adults within the criminal justice system. An electronic literature search returned 438 titles, with screening leaving 13 articles considered appropriate for the review question. The majority of these were USA studies, with two UK and two Canadian studies. Heterogeneous study methodologies permit only a narrative approach to pooling the data. Findings indicate that a considerable proportion of this population have difficulty fully understanding the caution. Higher IQs and verbal comprehension are positively associated with performance. The studies also indicate that some factors that may appear intuitively related to comprehension, such as prior caution exposure, education, age and mental health, may not be linked to performance. The literature generally used broad inclusion criteria, which increased potential for confounders and reduced opportunity to draw out probable predictors.

本综述系统地审查了文献，探讨了在刑事司法系统内的成年人中对口头提出的警察警告的理解以及影响这一点的建议因素。电子文献搜索返回 438 篇文章，筛选后留下 13 篇被认为适合评论问题的文章。其中大部分是美国研究，两项英国研究和两项加拿大研究。异构研究方法只允许采用叙述性方法来汇集数据。调查结果表明，该人群中有相当一部分人难以完全理解谨慎。更高的智商和语言理解与表现呈正相关。研究还表明，一些可能直观地与理解相关的因素，例如事先警告暴露、教育、年龄和心理健康，可能与表现无关。文献通常使用广泛的纳入标准，这增加了混杂因素的可能性并减少了提取可能预测因素的机会。