About This Chapter
Experimental & Quasi-Experimental Designs - Chapter Summary
Our instructors have created this chapter to help educators gain a deeper understanding of how they can conduct useful research in the field of special education. A full range of research design topics are addressed in this chapter, including the direct applications of various experimental designs, factors that influence research designs, and the key elements of each individual design.
These lessons provide an excellent structure for teacher education programs. Individuals can review these lessons for self-improvement or continuing education purposes, or these lessons can be discussed during professional development sessions. With 24/7 access to these resources, educators can review these materials whenever it fits their schedules.
How It Helps
- Builds awareness: You'll be presented with the various types of experimental designs and can expand your knowledge of research experiments.
- Teaches proper usage: These lessons can get you up to speed on proper methods for designing experiments and reviewing results.
- Makes experimental design simple: You'll find step-by-step explanations of each different design.
By the end of this chapter, you will be prepared to:
- Describe the elements of the true experimental research design
- Identify and explain the purpose of the control group in research
- Point out the types and characteristics of quasi-experimental designs
- Define two-group experimental designs
- Examine pretest-posttest and longitudinal designs
- Differentiate the between-subjects design from the within-subject design
- Explain examples of cross-sectional research
- Show the purpose of factorial design
- Offer examples of multivariate experimental design
- Outline the setup for ex post facto designs
1. The True Experimental Research Design
You need to set up a true experiment to test a hypothesis and demonstrate a cause and effect relationship. This lesson will teach you how this is accomplished and when you are forced to use other research designs.
2. What is a Control Group? - Definition and Use in Research
In research, many times a condition is compared to a group that doesn't receive treatment. In this lesson, we'll look at what a control group is and why it is important.
3. 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.
4. Two-Group Experimental Designs: Definition & Examples
How does a researcher know if their treatment has an effect or not? In this lesson, we'll look at two-group experimental designs, contrast control and treatment groups, and examine random assignment and matched groups.
5. 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.
6. 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.
7. Between-Subjects Designs: Definition & Examples
Many times in research, a psychologist wants to look at two or more groups to see which condition works best. In this lesson, we'll look at some of the strengths and weaknesses of the between-subjects design and how to form equivalent groups.
8. Within-Subject Designs: Definition, Types & Examples
Sometimes a researcher wants to look at how each subject does at different points during a study. In this lesson, we'll look at some of the strengths and weaknesses of a within-subjects design and how to counterbalance subjects for a stronger study.
9. Cross-Sectional Research: Definition & Examples
Cross-sectional research is used to examine one variable in different groups that are similar in all other characteristics. Learn more about cross-sectional research in this lesson and test your knowledge with a quiz at the end.
10. What is Factorial Design? - Definition & Example
The simplest studies involve one independent and one dependent variable. But what happens when a researcher wants to study more than one independent variable? In this lesson, we'll look closer at factorial design in research.
11. Multivariate Experimental Design
Most research studies only have one dependent variable. But what if a researcher wants to study more than one dependent variable? In this lesson, we'll look at multivariate research designs and how they differ from factorial designs.
12. 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.
Earning College Credit
Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.
To learn more, visit our Earning Credit Page
Transferring credit to the school of your choice
Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.
Other chapters within the Research Methods in Special Education course
- Research Foundations for Education
- Developing a Research Plan
- Data Collection Methods & Techniques
- Single-Subject Research Designs
- Sampling and Generalization
- Overview of Measurement in Research
- Internal Validity in Research
- External Validity
- Statistical Analysis: Descriptive & Inferential Statistics
- Qualitative Research Methods and Design
- Issues in Ethical Research