Measurement Reliability

Chapter 2 Introduction to Measurement and Statistics

Measurement Reliability

Types of Measurement Reliability  Stability reliability

 Equivalent Reliability  Internal consistency

Form A = Form B? Item Analysis

Objectivity  Special case of measurement reliability

 Examples

Assessment of Measurement Reliability  Need at least two values  Procedures

How Measurement Validity and Reliability are Connected  Must be reliable to be valid  If valid, then must be reliable  Can be reliable but not valid

Summary  Figure 2.2 The Relationship Between Reliability and Validity.