Test Yourself

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1. Internal validity is important if you are trying to understand the underlying causes of behavior.
2. Keeping variables constant is the key to the simple experiment´s internal validity.
3. If you randomly assign participants to treatment or to no treatment , the treatment will be the only systematic difference between your treatment group and your no treatment group.
4. "Men are more creative than women" is an experimental hypothesis.
5. Which of the following is a null hypothesis?
6. If you reject the null hypothesis, you conclude that
7. If you fail to reject the null hypothesis, you conclude that treatment had no effect
8. In the experiment looking at the effects of full-spectrum light on mood, full-spectrum light is the
9. In the experiment looking at the effects of full-spectrum light on mood, mood is the
10. The control group is the treatment group.
11. The treatment group and control group should each be composed of many (at least 30) participants.
12. Because of independence, your treatment group and control group should be independent, preexisting groups.
13. Which of the following can be randomly assigned?
14. A statistically significant difference is a reliable difference.
15. If you have statistically significant difference, you know you have found  a large difference.



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