This "What Works Clearinghouse Procedures and Standards Handbook (Version 3.0)" provides a detailed description of the standards and procedures of the What Works Clearinghouse (WWC). The remaining chapters of this Handbook are organized to take the reader through the basic steps that the WWC uses to develop a review protocol, identify…

In a review of the challenges to progress in providing social research evidence that might usefully inform policy, Oakley (2004) argues strongly that the "paradigm divide" between qualitative and quantitative research communities continues to constitute a major problem. Oakley refers to a number of recent critiques of what is seen as "misplaced…

This project was part of the Portland High Impact Program and had as its goal a 60 percent reduction in burglary losses over a three-year period to be attained by installing centrally-monitored, silent, anti-intrusion devices in eleven schools. Comparison with eleven control schools indicates that the alarm system has demonstrated effectiveness in…