- Differentiate between the various data collection strategies for experimental, non-experimental and experimental research.
- Differentiate the experimental and the control group.
- Define random assignation and explain its importance in an experiment.
- Explain how internal validity can be affected by research design.
There are many data collection strategies from which a researcher can choose. Choosing the data collection strategy is another important decision for the researcher. If the wrong strategy is chosen, it is likely that the researcher will not be able to answer the research question(s). In the following sections we will discuss three types of data collection strategies: experiments, quasi-experiments, and non-experimental.