Using the provided article address each of the questions below in a short answer format or a bulleted list with complete sentences. Please include the question:
*Design
1.What type of design is used in the study? Identify and describe the characteristics of the study design (use a diagram where appropriate).
2.Were subjects assigned to different conditions? If so, how was the comparability of the groups established?
*Internal Validity
1.List the threats of internal validity and describe if it is or is not a problem in this study.
*External validity
1.What are the limits to generalizability in terms of external validity and what, if any, are the external threats that create those limitations?
*Sample
1.How was the sample selected and what type of sampling method is used in the study?
2.Does the sample reflect the population identified in the problem/purpose?
3.Is the method of sample selection described one that is likely to result in a representative, unbiased sample?
4.Does the article substantiate the sample size?
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