See attached file.
? Discuss potential challenges to validity and reliability of your research question, data, and analysis.
? Outline steps needed to minimize these challenges.
1) Discuss potential challenges to validity and reliability of your research question, data, and analysis.
Validity refers to the strength of the conclusions, or in other words the study's success at measuring what you truly set out to measure. Reliability refers to the consistency or repeatability of your results. Here are some potential challenges that I see in your question, methods (research design), and data:
a. The two experimental groups (old medication, new medication) were not assigned in a random fashion, introducing possible confounds into the conclusions you might draw. I suspect that (based on the methods you described) some patients had decided to continue taking the old medication, whereas others decided to try the new medication. If this was truly the case, then the experimental groups are not randomly assigned, and therefore any conclusions that you draw about the effects of the medication might be influenced by the patients' choices and personalities rather than by the treatment ...
The challenges to validity and reliability for South Oak Hospitals are examined.