Copyright

Ch 12: Experimental Design: Help and Review

About This Chapter

The Experimental Design chapter of this Research Methods in Psychology Help and Review course is the simplest way to master experiment design. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of experiment design.

Who's it for?

Anyone who needs help learning or mastering research methods in psychology material will benefit from taking this course. There is no faster or easier way to learn about psychology research methods. Among those who would benefit are:

  • Students who have fallen behind in understanding the advantages and disadvantages of various experiment designs
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning psychology (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about experiment design
  • Students who struggle to understand their teachers
  • Students who attend schools without extra psychology learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the Experimental Design chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Experimental Design chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any experimental design question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

This chapter helps students review the concepts in an experimental design unit of a standard research methods in psychology course. Topics covered include:

  • Random assignment in research
  • The uses of control groups in research
  • Between- and within-subjects designs
  • Two-group experiment designs
  • Matched group design
  • Multiple group design
  • Factorial design variations
  • Interactions and main effects in factorial experiment design
  • Multivariate experimental design
  • Carryover effects and counterbalancing
  • ABA and multiple-baseline designs

19 Lessons in Chapter 12: Experimental Design: Help and Review
Test your knowledge with a 30-question chapter practice test
Between-Subjects Designs: Definition & Examples

1. 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.

Random Assignment in Research: Definition and Importance

2. Random Assignment in Research: Definition and Importance

In order to get the most accurate results, researchers must choose and assign their subjects in a random manner. In this lesson, we'll look at random assignment, random selection, and why they are important.

What is a Control Group? - Definition and Use in Research

3. 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.

Two-Group Experimental Designs: Definition & Examples

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.

Matched-Group Design: Definition & Examples

5. Matched-Group Design: Definition & Examples

Choosing how to divide subjects into groups is a major part of experimental design. In this lesson, we'll look at a type of non-random assignment, matched-group design, and its strengths and limitations.

Multiple Group Design: Definition & Examples

6. Multiple Group Design: Definition & Examples

What happens when a researcher has many groups in their study? In this lesson, we'll look closer at multiple-group design, including multiple-group design with independent groups and multiple-group design with correlated groups.

What is Factorial Design? - Definition & Example

7. 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.

Factorial Design Variations

8. Factorial Design Variations

When a study has more than one factor, it is called a factorial design. In this lesson, we'll go through different variations on factorial designs, including those involving factor levels and those involving between- or within-groups measurement.

Interactions in Factorial Design

9. Interactions in Factorial Design

When a study has a factorial design, the two independent variables can interact with each other to affect the dependent variable. In this lesson, we'll look at what interactions are, what they look like, and what a crossover interaction is.

Main Effects in Factorial Design

10. Main Effects in Factorial Design

When you have more than one independent variable, sometimes you want to look at how they work independent of each other. In this lesson, we'll examine main effects in factorial design and how they differ from interactions.

Multivariate Experimental Design

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.

Within-Subject Designs: Definition, Types & Examples

12. 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.

Carryover Effects & How They Can Be Controlled Through Counterbalancing

13. Carryover Effects & How They Can Be Controlled Through Counterbalancing

Within-subjects research has a lot of advantages, but one disadvantage is the possibility of carryover effects. In this lesson, we'll examine carryover effects and how they can be controlled through a counterbalanced design.

Small n Designs: ABA & Multiple-Baseline Designs

14. Small n Designs: ABA & Multiple-Baseline Designs

When planning a study, the size of the sample can influence the results of the study. To get around this, some researchers choose a research design specifically meant for small sample sizes. In this lesson, we'll look at some small 'n' designs.

Advantages & Disadvantages of Various Experimental Designs

15. Advantages & Disadvantages of Various Experimental Designs

There are many different options for researchers when deciding how to run a study. In this lesson, we'll look at some of the advantages and disadvantages of some common experimental designs.

Quasi-Experiment in Psychology: Definition & Example

16. Quasi-Experiment in Psychology: Definition & Example

In this lesson, you will learn to define the term 'quasi-experiment' and also learn why it is used in research. Following the completion of the lesson, you will have an opportunity to test your knowledge with a short quiz.

Controlled Experiment: Definition, Parts & Examples

17. Controlled Experiment: Definition, Parts & Examples

Scientific studies are often made via controlled experiments, which are essential to confirming the validity of the experimental results. In this lesson, you'll learn more about controlled experiments.

Control Group: Definition & Explanation

18. Control Group: Definition & Explanation

A control group is used in an experiment to establish its validity. It is the group to which no treatment is administered. Learn more about how a control group works in this lesson.

True Experiment: Definition & Examples

19. True Experiment: Definition & Examples

A true experiment is thought to be the most accurate experimental research design. Learn more about true experiments from examples and test your knowledge with a quiz.

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

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.

Support