1. Chapter 5 Designing Valid Communication Research

2. Validity = accuracy Internal Validity External Validity

3. Measurement Validity and Reliability Measurement validity Measurement reliability

4. Testing measurement reliability Test-retest Split-half reliability Intercoder reliability

5. Testing Measurement Validity Content validity Criterion-related validity Construct validity

6. 3 Threats to Internal Validity How research is conducted Threats due to research participants Threats due to the researcher

7. Threats to internal validity due to how research is conducted Procedure validity & reliability History Sleeper effect

8. Threats to internal validity due to how research is conducted con’t sensitization Data analysis

9. Threats to internal validity due to how research participants Hawthrone effect Selection Statistical regression

10. Threats to internal validity due to how research participants con’t Mortality Maturation Interparticipant Bias

11. Threats to internal validity due to how researcher Researcher personal attribute effect Researcher unintentional expectancy effect Researcher observational biases

12. Threats to External Validity Sampling Ecological Validity Replication

13. Threats to external validity due to sampling Population Target group census

14. Sampling Random sampling –Simple random sample –Systematic sample

15. Sampling Con’t Random sampling –Stratified sample –Cluster sample

16. Non-random sampling Convenience sample Volunteer sample Purposive Quota Network

17. Ecological Validity Natural settings Confederates

18. Replication Exact replication Partial replication Conceptual replication