The study questions in this unit will help you apply the detailed information about measurement and data collection in analyzing other research studies. 

1. Describe types of research variable measurement--including self-report, observation, interview, and biophysiologic data. Obtain examples from the literature of appropriate research measurements of these types.
2. Distinguish between random and systematic error in measurement.
3. Define the types of reliability in research measurement. Specify how the different types of reliability are obtained.
4. Define the types of validity for research measures. Specify how different types of validity are determined.
5. Identify the difficulties subjects have in responding to scales, such as the Likert and visual analogue.
6. What factors should a researcher consider in selecting an existing instrument for use in her study?
7. What is the difference between structured and unstructured interview measurement format.
8. Discuss the importance of cultural sensitivity in measurement.
9. Discuss sensitivity and specificity of physiologic measures.
10. Discuss the importance of planning in conducting data collection.
11. Outline a plan that guides data collection.
12. Describe procedures that a qualitative researcher uses to maintain data quality.