Validity in Quantitative Research Discussion

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 Validity in Quantitative Research Discussion

Validity in Quantitative Research Discussion

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Reflect on the following scenarios:

Wanda has been involved in a research study of the causes of tooth decay in elementary school children. Twenty-five percent of the students in the free breakfast program at a local school have been screened by a local dental hygienist. The dental hygienist finds an average of 3.5 cavities per student. The same dental hygienist recently screened 25% of the students in a school with no free breakfast program, and found an average of only 1.5 cavities per student. Wanda concludes that the breakfast served to students is the cause of higher tooth decay. Do you agree with Wanda? Can you think of other causes for the higher number of cavities among the students from the school with free breakfast?

Jerry is conducting a phone survey to determine public opinions on Medicaid reform. In order to get a random sample, Jerry decides to call the tenth number on the second column of every fifth page of the phone book. He also decides to stop sampling when he has completed 50 surveys. After reaching the target number, Jerry begins to analyze the data he has gathered and is surprised to find that opposition to reform is running about 18% higher than the national average. He is at a quandary to explain this significant difference in numbers. What are some reasons you can think of for the higher rate of opposition?

As you consider these scenarios, you may note issues or problems related to the validity of the research and conclusions. This week, you assess validity in quantitative research. You are introduced to the different types of validity and why they are important to consider when evaluating evidence and research studies. You also examine common threats to validity and consider how to minimize those threats.

Discussion: Validity in Quantitative Research Designs

Validity in research refers to the extent researchers can be confident that the cause and effect they identify in their research are in fact causal relationships. If there is low validity in a study, it usually means that the research design is flawed and the results will be of little or no value. Four different aspects of validity should be considered when reviewing a research design: statistical conclusion validity, internal validity, construct validity, and external validity. In this Discussion, you consider the importance of each of these aspects in judging the validity of quantitative research.

To prepare:

Review the information in Chapter 10 of the course text on rigor and validity.
Read the method section of one of the following quasi-experimental studies (also located in this week’s Learning Resources). Identify at least one potential concern that could be raised about the study’s internal validity.Metheny, N. A., Davis-Jackson, J., & Stewart, B. J. (2010). Effectiveness of an aspiration risk-reduction protocol. Nursing Research, 59(1), 18–25.
Padula, C. A., Hughes, C., & Baumhover, L. (2009). Impact of a nurse-driven mobility protocol on functional decline in hospitalized older adults. Journal of Nursing Care Quality, 24(4), 325–331.
Yuan, S., Chou, M., Hwu, L., Chang, Y., Hsu, W., & Kuo, H. (2009). An intervention program to promote health-related physical fitness in nurses. Journal of Clinical Nursing, 18(10), 1,404–1,411.
Consider strategies that could be used to strengthen the study’s internal validity and how this would impact the three other types of validity.
Think about the consequences of an advanced practice nurse neglecting to consider the validity of a research study when reviewing the research for potential use in developing an evidence-based practice.
Post the title of the study that you selected and your analysis of the potential concerns that could be raised about the study’s internal validity. Propose recommendations to strengthen the internal validity and assess the effect your changes could have with regard to the other three types of validity. Discuss the dangers of failing to consider the validity of a research study.

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes.

Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages.

Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor.

The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument.

ADDITIONAL INSTRUCTIONS FOR THE CLASS

Discussion Questions (DQ)

  • Initial responses to the DQ should address all components of the questions asked, include a minimum of one scholarly source, and be at least 250 words.
  • Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source.
  • One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words.
  • I encourage you to incorporate the readings from the week (as applicable) into your responses.

Weekly Participation

  • Your initial responses to the mandatory DQ do not count toward participation and are graded separately.
  • In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies.
  • Participation posts do not require a scholarly source/citation (unless you cite someone else’s work).
  • Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week.

APA Format and Writing Quality

  • Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required).
  • Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation.
  • I highly recommend using the APA Publication Manual, 6th edition.

Use of Direct Quotes

  • I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly.
  • As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content.
  • It is best to paraphrase content and cite your source.

 

LopesWrite Policy

  • For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me.
  • Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes.
  • Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own?
  • Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score.

Late Policy

  • The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies.
  • Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances.
  • If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect.
  • I do not accept assignments that are two or more weeks late unless we have worked out an extension.
  • As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading.

Communication

  • Communication is so very important. There are multiple ways to communicate with me:
    • Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class.
    • Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours.

 

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