Ch 7: Quasi-Experimental Research

About This Chapter

Watch our online video lessons to learn about characteristics of quasi-experimental design. Each lesson is accompanied by a short multiple-choice quiz to help check your understanding of longitudinal, cross-sectional and ex post facto experiment designs, among others.

Quasi-Experimental Research - Chapter Summary and Learning Objectives

A quasi-experiment includes some features of a well-conducted experiment while lacking others. For example, a quasi-experiment might feature important controls, such as a random sample, but not have a manipulated independent variable. You can learn about quasi-experimental research through this chapter, which includes video lessons, written transcripts and self-assessment tests. By the end of this chapter, you should be able to do the following:

  • Identify types of quasi-experiments, including non-equivalent groups design, pretest-posttest design and interrupted time-series design
  • Differentiate between ex post facto design and true experimental research techniques
  • Explain the difference between longitudinal and cross-sectional studies
  • Describe how pretest and posttest data is used to compare groups and measure change

VideoObjective
What is Developmental Research? Definition, Purposes & MethodsDefine and discuss developmental research.
Quasi-Experimental Designs: Definition, Characteristics, Types & ExamplesDefine and discuss characteristics of quasi-experimental designs.
Ex Post Facto Designs: Definition & ExamplesDefine and discuss ex post facto designs.
Longitudinal Designs: Definition & ExamplesDefine and discuss longitudinal designs.
Cross-Sectional Designs: Definition & ExamplesDefine and discuss cross-sectional designs.
Pretest-Posttest Design: Definition & ExamplesDefine and discuss pretest and posttest design.
Understanding the Time Dimension in ResearchDiscuss how the time dimension is accounted for in social research, including cross-sectional and longitudinal research and case studies.

7 Lessons in Chapter 7: Quasi-Experimental Research
Test your knowledge with a 30-question chapter practice test
What is Developmental Research? - Definition, Purpose & Methods

1. What is Developmental Research? - Definition, Purpose & Methods

This lesson explores the basics of developmental research. Explore how cross-sectional and longitudinal studies can help researchers study the changes that occur as we age.

Quasi-Experimental Designs: Definition, Characteristics, Types & Examples

2. Quasi-Experimental Designs: Definition, Characteristics, Types & Examples

This lesson explores the basic definition of why there is the label of quasi-experimental design in addition to what types of designs are quasi-experimental.

Ex Post Facto Designs: Definition & Examples

3. Ex Post Facto Designs: Definition & Examples

This lesson explores what an ex post facto design is using two different examples. In addition, specific attention is paid to differentiating ex post facto from true experiment to reduce confusion.

Longitudinal Designs: Definition & Examples

4. Longitudinal Designs: Definition & Examples

This lesson discusses the uses and procedures in running a longitudinal design. In addition, we also explore some of the benefits and issues that can occur when using such a design.

Cross-Sectional Designs: Definition & Examples

5. Cross-Sectional Designs: Definition & Examples

This lesson explores the process and requirements in using a cross-sectional design. Two examples are used, one common and one uncommon, to demonstrate how cross-sectional designs can be used in quasi-experiments.

Pretest-Posttest Design: Definition & Example

6. Pretest-Posttest Design: Definition & Example

This lesson explores the process and technique of using a pretest-posttest design in psychology. Two simple examples will allow you to understand how to apply this type of design in a future experiment.

Understanding the Time Dimension in Research

7. Understanding the Time Dimension in Research

Something few researchers consider is how the passage of time may affect some research studies. This lesson explores a few different types of studies and how a researcher has to take the dimension of time into consideration when planning the whole experiment.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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