1. Chapter 3 Moving from fact to truth: Validity, reliability, and measurement

2. Three Strange Stories Weird weather Jerry Derryberry and Bubba Skaggs Lucky golf shots

3. Validity Internal validity External validity Construct validity Conceptual validity

4. Reliability Temporal consistency / test-retest reliability Internal consistency Interobserver agreement The “more is better rule” of reliability

5. Measurement Scales Nominal scales Ordinal scales Interval scales Ratio scales The validity of measurement assumptions

6. Key Terms from Chapter 3 Internal validity External validity Construct validity Conceptual validity Interobserver agreement Interrater reliability Covariation Temporal sequence Confederates Third-variable problem Confounds Internal consistency Temporal consistency Test-retest reliability “More is better” rule Nominal scale Ordinal scale Interval scale Ratio scale Jerry Derryberry, Jr.