Chapter 14 Key Terms and Issues


KEY TERMS

Temporal precedence

Covariation

Spurious

Single-n designs

Baseline

Stable baseline

A-B design

A-B-A reversal design

Carry-over effects

Multiple baseline design

History

Instrumentation

Maturation

Mortality

Selection

Selection-maturation interaction

Statistical regression

Testing

Pretest-posttest design

Quasi-experiments

Time-series design

Non-equivalent control group design


Key Issues

In this chapter, we address the following questions:

1. How do randomized laboratory experiments establish internal validity?

2. How can single-n studies establish internal validity?

3. What factors may threaten a single-n experiment's internal, external, and construct validity?

4. What are Campbell and Stanley's 8 threats to internal validity?

5. How do quasi-experimental designs deal with the 8 threats to internal validity?


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