Office for Students (OfS) typology establishes the following broad-based standards of evidence and evaluation:
Description | Evidence Used | Possible Claims | |
---|---|---|---|
Type 1: Narrative | The evaluation provides a narrative and coherent theory of change to motivate the selection of activities in the context of a coherent strategic approach. | Evidence of impact elsewhere and / or in the research literature on effectiveness, or from your existing evaluation results. | Can provide a coherent explanation of what and why. Claims are research-based. |
Type 2: Empirical | Evaluation collects data on outcomes and impact and reports evidence that those receiving an intervention might have better results, although this does not establish any direct causal effect. | Qualitative and / or quantitative evidence of a pre / post treatment change or a treatment / non-treatment difference. | Demonstrates that interventions might be associated with potentially beneficial results. |
Type 3: Causal | Evaluation methodology provides evidence of causal effect of an intervention. | Qualitative and / or quantitative evidence of a pre / post treatment change on a treated group relative to an appropriate control or comparison group, using an appropriate and robust research design process. | Intervention causes improvement and demonstrable difference, using a control or comparison group. |
Table: Office for Students standards of evidence in evaluation
In evaluation practice 4.7 there is an example of type 2: empirical evaluation for a ‘feedback literacy’ initiative. A type 3: causal would need to be justified in terms of the resource (see evaluation practice 4.6) and would normally require ethical approval and if in doubt please contact your school or faculty research officer. See also guidance in evaluation practice 3.5 to help you.