1. Explain and give a few examples of selection bias.
2. What is mortality threat? Do some types of studies have greater mortality threat than others? How could this influence results?
3. Give one example of your own, of the history effect.
4. What is location threat and how does one best control it?
5. How can the test-retest method of reliability affect validity?
6. List three instrumentation threats.
7. Give two examples of how the Hawthorne effect gives surprising results.
8. What is regression threat?
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