1. Lay out the design for two between-subjects experiments: a) an experiment involving an experimental group and a control group, and b) a factorial design with three independent variables that have three, and two levels respectively.
2. Discuss some of the advantages of using a between-subjects design.
3. Compare and contrast:
· Between-subjects with within-subjects designs
· Small N designs with large N designs.
In what circumstances would you use the within-subjects design and in what circumstances would you use the large N design?
4. Discuss how to minimize the problems of fatigue, boredom, or practice effects in within-subject designs.
5. Since obtaining statistical significance is easier to obtain with a directional hypothesis (one-tailed test) than with a non-directional hypothesis (two-tailed test), why would anyone ever design a study with a nondirectional hypothesis?
6. Explain the purpose of a null hypothesis. Why are both a research/alternative hypothesis and a null hypothesis necessary in statistics?
7. How can internal and external validity be increased in an experiment?
dono
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