Glossary

The quality of the study is moderate, meaning we can be somewhat confident in the study findings. However, other factors not accounted for in the study might also have contributed to the findings. This applies to findings from random assignment studies that, because of flaws in the study design or analysis (for example, high sample attrition), do not meet the criteria for the high rating but satisfy other design criteria. We also assign the moderate rating to study findings from well-executed QEDs.