Definition of Evidence Based Research

The term evidence-based is often in the educational and psychological literature as the level of evidence that supports the efficacy, generality, and use of a practice as indicated by research. The more specific term evidence-based interventions (EBIs) refers to intervention or treatment approaches that are supported by sufficient scientific or research evidence. In determining the evidence base of a prevention or intervention approach or program, consideration is given to the level, degree, and/or type of research supporting the conclusion that a prevention/intervention/ treatment is effective. An evaluation of the evidence base to support an intervention requires examining whether reliable and valid methods were applied in documenting the effectiveness of prevention and intervention programs. In addition, consideration is given to critical aspects of the intervention, including evidence-based is:

  • Acceptability (degree to which consumers find the intervention procedures and outcomes acceptable in their daily lives)
  • Feasibility (degree to which intervention components can be implemented in naturalistic contexts)
  • Social validity (relevance of the targeted outcomes to the everyday life of consumers)
  • Fidelity or integrity (extent to which an intervention is carried out as intended)
  • Sustainability (extent to which the intervention can be maintained without support from external agents)


The Encyclopedia of School Psychology (2008). Evidence Based Interventions. Retrieved on January 19, 2009 from: