Article Critique

Read the Murphy et al. (2001) and respond to the following questions about it.
1.Identify the independent variable(s) and the dependent variable(s)
2.Identify two potential confounding variables that the authors attempted to control for
3.In your own words, how was each dependent variable operationalized? For each variable, note whether

it was nominal, ordinal, interval, or ratio.
4.State the null hypothesis and the alternative hypothesis.
5.As specifically as possible, what kind of methods did this study use (e.g. observational, quasi-

experimental, experimental)?
6.Describe the population of interest, the sampling frame, and the sample
7.How was the study sample selected from the population (in your own words)?
8.How were individuals assigned to conditions (in your own words)?
9.Identify a descriptive statistic that the authors provide (you can copy and paste)
10.Identify an inferential statistic that the authors provide (you can copy and paste)
11.Describe one aspect of the study that strengthens its internal validity (and explain WHY)
12.Describe one aspect of the study that weakens its internal validity (and explain WHY)
13.Describe one aspectof the study that enhances its external validity (and explain WHY)
14.Describe one aspect of the study that weakens its external validity (and explain WHY)
15.Describe one change you would make to the methods to strengthen its internal validity (and say why

that would strengthen internal validity)
16.Describe one change you would make to the methods to strengthen its external validity (and say why

that would strengthen external validity)
17.Provide the full citation for this article in APA-style

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