Nature of research The category characterizes the methods used to conduct the study and/or analyze its results.
Nature of the intervention's impact on student performance Each outcome is coded for one of four possible types of impact on student performance. The coding is based on statements made in the articles, not the coder's interpretation of them. The types of impact are: performance enhanced, performance not enhanced, performance declined, inconclusive.
No institutional code The institution does not have a Carnegie Code.
Number of interventions This is the number of times (sessions, modules, problems, units) an individual received the intervention.