3. Collect Data to Answer Your Case Study Questions

Considerations For Data Collection

As you develop your data collection instruments and tools, you will likely need to consider the necessary steps for the actual collection of the data. To ensure that this process goes smoothly, there are several considerations to think about. These include:

Determining how much data

The amount of data collected is partially dependent upon the method you’ve chosen. For example, if you decide to conduct interviews or focus groups that will yield text-based responses (qualitative data), you may need only 10 to 15 participants in order to identify common themes and draw conclusions from the data. If you decide to collect numeric (quantitative) data through a survey, you will probably need 50 or more participants to be able to see patterns in the data and arrive at reliable conclusions. Cast the widest net possible, working within your resource constraints—for example, if your project does not have the resources to analyze a large number of surveys, select a smaller, representative sample.

Soliciting participants

If you are collecting data from people (as opposed to, for example, technology sources such as website log files), you will need to solicit and invite participants to take part in your case study. This would entail drafting a letter of invitation to your target participants. You may even want to offer incentives for people to participate in your survey (such as a chance to participate in a lottery or other reward).

Setting deadlines

It is a good idea to set a definite stopping point for data collection activities. This is to ensure that the case study is completed within a reasonable amount of time, and to help set goals and expectations for those involved.

Anticipating hurdles

Be prepared for unexpected hurdles that might arise during data collection activities. For example, if you are conducting a survey, plan ahead about what to do in case you do not receive an adequate number of responses. You might consider sending out reminder notices, or extending the original deadline.

Tools and Examples

Increase Survey Response Rates

Example: Distribution of a Survey

Example: Solicit Participants

Practical Guide: Conduct and Assess Teacher/Learner Trials