article critique

Critique/Evaluate the Research Design issues:

What specific research design(s) did the authors use? (May not be stated directly you should be able to figure it out based on what you have learned)
Are there threats to internal and external validity? If yes, discuss. 

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Critique/Evaluate the Sampling issues:

What is the population that the authors wanted to study (i.e., target population)?
Does the population (i.e., sampling frame) from which the sample was taken represent all of the appropriate people?
What type of sampling technique was used?
What are the implications of this sampling technique for the findings?
Are there issues with external validity?

ANSWER ALL QUESTIONS. NO WORD FOR WORD or IN-TEXT CITATIONS

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