“…Implicit assumptions about training and learning also inform their practice and the degree to which they understand and apply training pedagogies. Recent research from a range of police training settings (e.g., Shipton, 2012Shipton, , 2020Basham, 2014;Belur et al, 2020;Cushion 2020;Staller et al, 2021) suggests that police training practice and knowledge is most often developed by informal sources, particularly observation and experience (Koerner and Staller, 2020;Rajakaruna et al, 2017;Bergman et al, 2018). This results in practice based on history and tradition (Karp and Stenmark, 2011), rather than empirical evidence, with Koerner and Staller (2020) and Koerner and Staller (2019b) arguing that decisions within the 'how-dimension' of police training are less the result of professional trainer education than an (uncontrolled) effect of socialization, resulting in a selfreferenced, anecdotal approach to training practice based on 'what-works' and what trainers perceive 'gets results' (Cushion, 2020).…”