Other includes studies with findings that do not align to any evidence tier, studies with findings only aligned to Tier 4, and some studies with findings aligned to Tier 3. Studies that were reviewed under version 1.0 or 2.0 WWC Standards will be categorized as Other, even though the findings may meet the criteria for Tier 3. In addition, studies that Do Not Meet WWC Group Design Standards will be included in the Other category because the findings from these studies are not reviewed for evidence tier alignment.
Use this search page to find individual studies that have been reviewed by the WWC and categorized into ESSA evidence tiers. Select options from the filters or enter author/title information into the search box. The resulting list of studies connects you to more information, including whether the study has been included in a WWC publication that summarizes evidence from more than one study.