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Ch 20: Research Methodology and Statistics

About This Chapter

This video lesson is designed to provide you with an easy-to-understand introduction to research and statistics. Learn about the different types and methods of research and how to form a research hypothesis.

Research Methodology and Statistics - Chapter Summary

This chapter begins with an introduction to psychological research tools, including those related to observation, measurement and experimentation. You'll also learn about the different types of research procedures, such as mixed, qualitative and quantitative methodology. In addition, the chapter will provide you with a definition of scientific and nonscientific research, with explanations on how they differ.

As you progress through the lesson, you'll be introduced to the different types of research design. You'll also acquire strategies for selecting data collection techniques. Additional topics include a discussion of true experimental design and the inferential statistics used in psychology studies. After completing this chapter, you will know how to

  • Choose a problem to research
  • Write a research question
  • Formulate a research and a null hypothesis
  • Assess the quality of a research study for reliability and validity
  • Interpret correlations in research results
  • Work with research variables, including control, dependent, extraneous, independent and moderator

These online video lessons on research and statistics are taught by experienced and knowledgeable educators and professionals. These short and engaging tutorials are also available as video transcripts, and you can use the self-assessment quizzes to test your own knowledge of this complex subject. You can also use the video tags to revisit the main parts of the presentation without having to re-watch the entire video.

16 Lessons in Chapter 20: Research Methodology and Statistics
Test your knowledge with a 30-question chapter practice test
Psychological Research Tools: Observation, Measurement & Experimentation

1. Psychological Research Tools: Observation, Measurement & Experimentation

What are the primary ways a psychologist goes about conducting research? In this lesson, we will look at the three main ways a researcher can go about learning something, as well as some of the more famous psychological research that has used these techniques.

Research Methodologies: Quantitative, Qualitative & Mixed Method

2. Research Methodologies: Quantitative, Qualitative & Mixed Method

While there are many ways to conduct an experiment in psychology, there are only so many ways you can describe it. In this lesson, we will discuss the differences, strengths, and weaknesses of the qualitative, quantitative, and mixed methods.

Nonscientific and Scientific Research: Definitions and Differences

3. Nonscientific and Scientific Research: Definitions and Differences

Explore the way people 'know' information without using a scientific methodology. Have you ever fallen for nonscientific research and then presented it as fact?

Types of Research Design

4. Types of Research Design

There are questions to be answered in all areas of psychology. How are these questions answered by professionals in the field? This lesson covers several different options researchers can use to approach such questions.

True Experimental Design

5. True Experimental Design

Experiments are the classic way to conduct research in almost any field of study. But do you know how true experiments really work? This lesson explains the details of experimental design, such as different types of samples, control groups and independent vs. dependent variables.

Selecting a Problem to Research

6. Selecting a Problem to Research

This lesson explores the process, pitfalls, and requirements for selecting a good problem to research. There is a bit more to it than just having a good idea.

Writing Research Questions: Purpose & Examples

7. Writing Research Questions: Purpose & Examples

What is a research question, and why is it important to get it right? This lesson will explore one way to write a research question, which guides a researcher in designing his or her experiment.

Formulating the Research Hypothesis and Null Hypothesis

8. Formulating the Research Hypothesis and Null Hypothesis

After figuring out what you want to study, what is the next step in designing a research experiment? You, the researcher, write a hypothesis and null hypothesis. This lesson explores the process and terminology used in writing a hypothesis and null hypothesis.

Research Variables: Dependent, Independent, Control, Extraneous & Moderator

9. Research Variables: Dependent, Independent, Control, Extraneous & Moderator

This lesson explores the terminology of experimental design. What are variables? How do they influence each other? Is it possible that you are seeing connections that don't actually exist?

Strategies for Choosing a Data Collection Technique

10. Strategies for Choosing a Data Collection Technique

After figuring out what you are going to study, you, as the researcher, will need to figure out how to study it. This lesson discusses popular ways a researcher can collect data as well as why a researcher would chose a particular data collection technique.

Validity and Reliability: How to Assess the Quality of a Research Study

11. Validity and Reliability: How to Assess the Quality of a Research Study

Many psychologists and teachers complete research studies. How can you tell if a study was done well? This lesson will cover many criteria for a good quality study, including types of reliability and validity.

How to Interpret Correlations in Research Results

12. How to Interpret Correlations in Research Results

Perhaps the most common statistic you'll see from psychology is a correlation. Do you know how to correctly interpret correlations when you see them? This lesson covers everything you need to know.

Inferential Statistics for Psychology Studies

13. Inferential Statistics for Psychology Studies

Psychology is a science, which means that in order to understand people's thoughts and behaviors, a basic understanding of statistics is necessary. Most psychology studies use inferential statistics. This lesson covers basic types of inferential statistics, as well as how to decide whether a hypothesis was supported by the results.

Normal Distribution: Definition, Properties, Characteristics & Example

14. Normal Distribution: Definition, Properties, Characteristics & Example

In this lesson, we will look at the Normal Distribution, more commonly known as the Bell Curve. We'll look at some of its fascinating properties and learn why it is one of the most important distributions in the study of data.

What Are Descriptive Statistics? - Definition and Uses

15. What Are Descriptive Statistics? - Definition and Uses

This lesson is a simple walk-through of the common types of descriptive statistics and why they are important for understanding psychological research. You will likely be familiar with many of them but some you may not be.

Surveys, Interviews, and Case Studies

16. Surveys, Interviews, and Case Studies

Researchers often have to decide how to collect data for their research. Should they ask people questions or observe them directly? This lesson will differentiate between three methods of data collection: surveys, interviews, and case studies.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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