About This Chapter
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
|What is Developmental Research? Definition, Purposes & Methods||Define and discuss developmental research.|
|Quasi-Experimental Designs: Definition, Characteristics, Types & Examples||Define and discuss characteristics of quasi-experimental designs.|
|Ex Post Facto Designs: Definition & Examples||Define and discuss ex post facto designs.|
|Longitudinal Designs: Definition & Examples||Define and discuss longitudinal designs.|
|Cross-Sectional Designs: Definition & Examples||Define and discuss cross-sectional designs.|
|Pretest-Posttest Design: Definition & Examples||Define and discuss pretest and posttest design.|
|Understanding the Time Dimension in Research||Discuss how the time dimension is accounted for in social research, including cross-sectional and longitudinal research and case studies.|
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.
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.
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.
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.
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.
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.
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.
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Other chapters within the Psychology 105: Research Methods in Psychology course
- Introduction to Research Methods
- Principles of Ethical Research
- Setting Up the Research Study
- Data Collection Techniques in Psychology
- Nonexperimental Research
- Qualitative Research Methods and Design
- Sampling and Generalization
- Measurement in Research
- Internal Validity in Research
- External Validity
- Experimental Design
- Descriptive Statistics in Psychology
- Inferential Statistics in Psychology
- Evaluating Research Findings
- Studying for Psychology 105