Quality ratings on the Psychology Law Evidence Database are provided for systematic literature reviews, meta-analysis, and meta-reviews by trained ratings based on the PRISMA 2009 Checklist, see www.prisma-statement.org for more information.
Quality ratings are not reported for economic/costing studies, evidence briefs for policy or court, or government documents.
Moher, D., Liberati, A., Telzlaff, J., Altman, D. G., The PRISMA Group (2009). Preference Reporting Items for Systematic Reviews and Meta-Analysis: The PRISMA Statement. BMJ, 339, b2535. doi: 10.1136/bmj.b2535.