There is also evidence from other countries. Lorraine Mazerolle, from the University of Queensland in Australia, conducted the first largescale randomized controlled trial in the field: sixty planned roadblocks were randomly assigned to be policed using either the procedural justice treatment condition or “business as normal.”40 In all, police pulled over between three hundred and four hundred cars per location. In the experimental condition, the traffic cop used a script that focused on the elements of procedural justice, including encouraging citizen participation and voice, and treating
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