
Unit 4: Research design
Quasi-experimental research
These are similar to experiments but without random assignment to the groups. There is a lack of internal validity – how can we be sure that x caused y if there was some engineering of the groups?
There are two main types:
- non-equivalent control group
- before-and-after
SMILE - Research design by Learning from WOeRk, University of Plymouth modified by Marion Kelt, Glasgow Caledonian University is licensed under a Creative Commons Attribution 3.0 Unported License.