The Matrix

mdpWhat strategies “work” in reducing crime and disorder in policing? Hundreds of examinations of police activity exist, but there are only approximately 130 that reach at least a moderate level of methodological rigor. The Evidence-Based Policing Matrix is a research-to-practice translation tool that organizes all of these studies visually, allowing agencies and researchers to view the field of research, from its generalizations to its particulars. The Matrix has been updated to include all qualifying studies through December, 2013. Look for our next update for all studies through December 2014 in the Spring of 2015.

The Matrix categorizes and visualizes these evaluations according to three common dimensions of crime prevention – the nature of the target, the extent to which the strategy is proactive or reactive, and the specificity or generality of the strategy (see the Matrix Key to learn more). This visualization reveals three-dimensional clusters of effective studies, or “realms of effectiveness.”  These realms provide insights into the nature and commonalities of effective police strategies and can be used by police agencies to guide developing future tactics and strategies, or assessing their tactical portfolio against the field.

Click here for articles explaining the Matrix in detail. You can download an Excel spreadsheet of all the studies and codings of the Matrix here. Click here to access free videos and materials about the Matrix from our Evidence-Based Policing Workshop. Click here to learn more about the BJA-funded Matrix Demonstration Project.

Want more resources on “what works” from this project? Check out this resource that Cody Telep created for the City of Seattle using the Matrix.

This Web site is funded in whole or in part through a grant from the Bureau of Justice Assistance, Office of Justice Programs, U.S. Department of Justice. Neither the U.S. Department of Justice nor any of its components operate, control, are responsible for, or necessarily endorse, this Web site (including, without limitation, its content, technical infrastructure, and policies, and any services or tools provided).