About This Chapter
Measurement in Research - Chapter Summary and Learning Objectives
Do you understand the importance of measurement in psychological research? Through this online chapter, you'll come to understand that the type of measurement you use will affect the conclusions you can draw from your research. You'll learn the difference between qualitative and quantitative measurement and explore various levels of measurement. After completing this chapter, you'll be able to do the following:
- Differentiate between continuous and discrete variables
- Identify various types of reliability, including interim, interrater and test-retest
- Discuss different kinds of validity, such as construct, content, face and predictive
|The Importance of Measurement in the Research Process||Explain why measurement is an important part of the research process.|
|The Difference Between Qualitative & Quantitative Measurement||Differentiate between qualitative and quantitative measurement.|
|Conceptualization & Operationalization in Measurement||Define and discuss conceptualization and operationalization in measurement.|
|Continuous & Discrete Variables: Definition & Examples||Define and discuss continuous and discrete variables.|
|Scales of Measurement: Nominal, Ordinal, Interval & Ratio||Define and discuss various levels of measurement, including nominal, ordinal, interval and ratio.|
|Commonly Used Research Measurement Scales||Discuss some commonly used scales, including Likert scaling, Thurstone scaling, Bogardus social distance scaling, Semantic Differential and Guttman scaling.|
|The Reliability of Measurement: Definition, Importance & Types||Define reliability and its importance in the context of measurement. Discuss the various types of reliability.|
|Methods for Improving Measurement Reliability||Discuss methods for improving reliability.|
|The Validity of Measurement: Definition, Importance & Types||Define validity and its importance in the context of measurement. Discuss the various types of validity.|
|The Relationship Between Reliability & Validity||Explain the relationship between reliability and validity.|
1. The Importance of Measurement in the Research Process
Why is it important to measure variables in a study? And, how do you go about doing it? In this lesson, we'll examine the importance of measurement, along with some common types of psychological measurement.
2. The Difference Between Qualitative & Quantitative Measurement
In research, there are generally two types of data. In this lesson, we'll look at quantitative and qualitative measurement, when each are used, and how researchers can sometimes use both.
3. Conceptualization & Operationalization in Measurement
When designing a study, how do you make sure that everyone knows what you're talking about? How do you measure things that seem difficult to measure? In this lesson, we'll look at two key steps in research: conceptualization and operationalization.
4. Continuous, Discrete & Categorical Variables: Definition and Examples
When doing research, variables come in many types. In this lesson, we'll explore the three most common types of variables: continuous, discrete, and categorical.
5. Scales of Measurement: Nominal, Ordinal, Interval & Ratio
When doing research, variables are described on four major scales. In this lesson, we'll look at the major scales of measurement, including nominal, ordinal, interval, and ratio scales.
6. Types of Tests: Norm-Referenced vs. Criterion-Referenced
What's the best way to score tests? In this lesson, we'll look at two major types of tests that are scored differently from each other: norm-referenced and criterion-referenced tests.
7. Types of Measurement: Direct, Indirect & Constructs
How do you measure psychological traits? In this lesson, we'll look at how psychologists measure traits, including direct and indirect observation. We will also explore why psychological traits are so difficult to measure.
8. Commonly Used Research Measurement Scales
How do you measure a person's thoughts or feelings when you can't see them? In this lesson, we'll look at common measurement scales that psychologists use when examining thoughts and feelings.
9. The Reliability of Measurement: Definition, Importance & Types
Psychologists use tools like surveys and tests to measure psychological traits. But, what happens when a measurement tool is not consistent? In this lesson, we'll examine what reliability is, why it is important, and some major types.
10. Methods for Improving Measurement Reliability
Reliability is the consistency of the results of a measurement tool. But, what causes a tool to have low reliability? And, what can be done to improve reliability? In this lesson, we'll answer both of those questions.
11. The Validity of Measurement: Definition, Importance & Types
How do you know if you are measuring what you actually want to measure? In this lesson, we'll look at what validity is, why it is important, and four major types of validity: face, construct, content, and predictive validity.
12. The Relationship Between Reliability & Validity
Though reliability and validity are different from each other, they are still related. In this lesson, we'll look at the differences of and relationship between reliability and validity.
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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
- Quasi-Experimental Research
- Sampling and Generalization
- Internal Validity in Research
- External Validity
- Experimental Design
- Descriptive Statistics in Psychology
- Inferential Statistics in Psychology
- Evaluating Research Findings
- Studying for Psychology 105