Importance of Sample Size and Shape Article Critique

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credentials and affiliation?

The one person named was Jane McCausland Kurz. She is an Registered Nurse and a PhD at Temple University in Philadelphia.

Did the researcher/s received funding that supported this research?

That was not disclosed. There is a header at the very end that says "Financial Disclosures" but there is nothing listed there.

Who were the study participants?

Nursing students…not quite 120 in total.

Was the eligibility criteria stated?

Didn't seem to be any…convenience sample.

Was a pilot study undertaken?

What is the underlying paradigm of the study?

That the network of organ donations existing right now is not sufficient for the people that need them, when they need them. At least part of the problem, as explained in the abstract of the study, is the misinformation that exists.

Does the study involve the collection of empirical evidence?

Yes.

What is empirical evidence?

Completed Likert-scale surveys from two groups that are differentiated based on how they were treated as part of the study.

Is the purpose of the study clearly stated?

Yes…stated on the first page that "was to evaluate the impact of an educational intervention on nursing students' knowledge, attitudes, registering as an organ donor and family discussions."

Was the research problem stated? If so, what is it?

Yes…they state that there is an issue with organ donations not meeting the nationwide need for organs and the study is using a study of public education as a means to address that.

What were the key concepts in this study?

More organs are needed for donations, a lot of misinformation exists out there, there needs to be a study as to why both of those items exist.

How many different databases did the researcher/s use?

It would seem that there were just two datasets…the two different groups of volunteers.

What is the independent variable (intervention)?

The lecture about organ donation

What is the dependent variable (outcome that is measured)?

Educational levels and organ donation enrollment rates.

What is the population?

The wider organ donating/needing population

How were the study participants recruited?

Volunteers at a nursing school (Temple)

What was the sample size?

Initially, it was not quite 120. About two thirds of those stayed on the whole time.

Was power analysis used to determine sample size needs?

No…they got the people they could…that's it.

Does the report specify a research question? If so, what is it?

No.

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Does the report specify a hypothesis? If so, what is it?

Yes. As noted on page 213, "one hypothesis was that students who attend the organ donation/transplant class lecture and laboratory will have higher knowledge levels, higher rates of registration as organ donors, and higher rates of sharing decisions. The second hypothesis was that four months after the class was completed, those students who attended the class and lab would have higher knowledge levels.

Were the data in the study quantitative or qualitative?

Quantitative…Likert scale would be all about the numbers.

Were any relationships under investigations?

Relationship between education/workshops about organ donation and the ensuing actions that would results immediately or down the road as compared to those that did not have such training or labs.

Is this an experimental or non-experimental study?

They used the term "quasi-experimental" on the first page of the study.

Does the study involve a conceptual or theoretical framework? If so, what are the key concepts of the model?

The framework cited, as shown on the bottom of page 212, is the Theory of Planned Behavior. The underpinnings, as stated in the study, are that "behavioral intentions are antecedents to the behavior and that attitudes about that behavior, subjective norms and perceived behavioral control influence the behavioral intention."

If there is a conceptual/theoretical framework, does the link between the research problem in this study and the framework seem genuine?

It's a little general as compared to what is being studied…but it seems to make sense overall.

How was the sample selected?

Volunteers…described in the study as a "convenience sample." No demographic information was collected.

Was randomization used?

Not in selecting the original group, no. Perhaps in separting into two groups.

Does the report describe an intervention? If so, what is it?

Yes…the education and labs about organ donation.

If there was an intervention, were there any comparisons? If….....

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