CHAPTER OBJECTIVES

Based upon their reading of Chapter 7, students should be able to:

1. define measurement and explain its nature and structure.
2. understand the four levels of measurement, the differences among these levels, and why these distinctions are important.
3. explain why and how data can be transformed from one level to another.
4. define measurement errors and identify common sources of said errors.
5. define validity, be familiar with the three basic kinds of validity, and be able to distinguish among these types.
6. define reliability and be familiar with the methods of assessing it.