After completing this chapter you should be able to:
- Explain the difference between validity and reliability.
- Differentiate between random and systematic errors.
- Describe the purpose of test-retest and alternate-form reliability.
- Explain what is meant by internal-consistency reliability.
- Describe methods for estimating and increasing internal-consistency reliability.
- Discuss reliability as it pertains to observational studies using judges.
- Describe how reliability is related to replication and external validity.
- Differentiate between content validity and criterion validity.
- Discuss the role of construct validity in test development and experimental research.
- Describe the role of statistical-conclusion validity and internal validity in making causal inferences.
