Thursday, 31 March 2016

PSY 325 Week 2 Assignment Inferential Statistics Article Critique


PSY 325 Week 2 Assignment Inferential Statistics Article Critique
Inferential Statistics Article Critique. Due by Day 7. Read the article “Differential Effects of a Body Image Exposure Session on Smoking Urge Between Physically Active and Sedentary Female Smokers,” and identify the research questions and/or hypotheses as they are stated. Consider the following questions: What are the variables (sample sizes, population, treatments, etc.)? What are the inferential statistics used in this article? Were the proper steps of hypothesis testing followed?
Write a two- to three-page paper presenting the information listed below. Include a title page and reference page in APA style. Cite any references made to the article within the body of the paper in APA style. Your paper should begin with an introductory paragraph (including a thesis statement) and end with a concluding paragraph summarizing the major points made in the body of the paper and reaffirming the thesis. When writing the article critique, your paper must:
  1. Determine what question(s) the authors are trying to answer by doing this research 
  2. Determine the hypothesis being tested and the concepts that were applied in this process. 
  3. Evaluate the article and critique the statistical analysis employed in the study. 
• Would you have included more and/or different variables? Explain your answer.
4. Examine the assumptions and limitations of the statistical study.
• What would you have done differently in this case? Why?
5. Identify how the authors applied statistical testing to the problem.
6. Interpret the findings of the author(s) using statistical concepts.
Writing the Article Critique
The Assignment:

  1. Must be two to three double-spaced pages in length (excluding title and reference pages), and formatted according to
    APA style as outlined in the Ashford Writing Center. 
  2. Must include a title page with the following: 
    1. Title of paper 
    2. Student’s name 
    3. Course name and number 
    4. Instructor’s name 
    5. Date submitted 
  3. Must document all sources in APA style, as outlined in the Ashford Writing Center. 
  4. Must include a separate reference page, formatted according to APA style as outlined in the Ashford Writing Center. 

PSY 325 Week 2 Discussions Standard Normal Distribution


PSY 325 Week 2 Discussions Standard Normal Distribution
Standard Normal Distribution. 1st Post Due by Day 3. For this discussion, identify the appropriate application of standardized scores to reflect on their benefits and to interpret how test scores and measures are commonly presented.
Review Chapter 3 of your course text, which introduces probability and the standard normal distribution. Examine the assumptions and limitations presented in these topics and then consider and discuss the following questions:
  • This is an easy to understand video that takes you step-by-step through the basic hypothesis testing process. It is helpful for learning what a p-value is and how statistical significance works. 
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  • When comparing data from different distributions, what is the benefit of transforming data from these distributions to conform to the standard distribution? 
  • What role do z-scores play in this transformation of data from multiple distributions to the standard normal distribution? 
  • What is the relationship between z-scores and percentages? 
  • In your opinion, does one do a better job of representing the proportion of the area under the standard
    curve? Give an example that illustrates your answer.
    Guided Response: Review your classmates’ posts. Respond substantively to at least three peers. What did you find useful about their explanations and examples? What suggestions would you make for improvement? Ask a question for further clarification as to the meaning and use of the z-scores. 

PSY 325 Week 3 Assignment ANOVA Article Critique


PSY 325 Week 3 Assignment ANOVA Article Critique
ANOVA Article Critique. Due by Day 7. Read the article “Cognitive Effects of Risperidone in Children with Autism and Irritable Behavior”, and identify the research questions and/or hypotheses as they are stated. Consider the following questions: What are the variables (sample sizes, population, treatments, etc.)? How was the analysis of variance used in this article (and what type of ANOVA was used)?
Write a two- to three-page paper presenting the information listed below. In addition, provide a title page and reference page in APA style. Cite any references made to the article within the body of the paper in APA style. Your paper should begin with an introductory paragraph (including a thesis statement) and end with a concluding paragraph summarizing the major points made in the body of the paper and reaffirming the thesis.
The body of your paper must:
  1. Determine what question(s) the authors are trying to answer by doing this research. 
  2. Determine the hypothesis being tested and the concepts that were applied in this process. 
  3. Evaluate the article and critique the statistical analysis employed in the study. Would you have included more
    and/or different variables? Explain your answer. 
  4. Examine the assumptions and limitations of the statistical study. What would you have done differently in this
    case? Explain your answer. 
  5. Identify how the authors applied statistical testing to the problem. 
  6. Interpret the findings of the author(s) using statistical concepts. 
Access the Critical Thinking Community website for tips on how to formulate your thoughts and discussion of these questions in a logical and meaningful manner.
Writing the Article Critique
The Assignment:
  1. Must be two to three double-spaced pages in length (excluding title and reference pages), and formatted according to APA style as outlined in the Ashford Writing Center. 
  2. Must include a title page with the following: 
    • Title of paper 
    • Student’s name 
    • Course name and number
  1. Instructor’s name 
  2. Date submitted 

  1. Must document all sources in APA style as outlined in the Ashford Writing Center. 
  2. Must include a separate reference page formatted according to APA style as outlined in the Ashford Writing Center. 

PSY 325 Week 3 Discussion ANOVA


PSY 325 Week 3 Discussion ANOVA
ANOVA. 1st Post Due by Day 3. In this discussion, you will evaluate a research question and determine how that
question might best be analyzed. To do this, you will need to identify the appropriate application of course specified statistical tests, examine assumptions and limitations of course specified statistical tests, and communicate in writing critiques of statistical tests.
A researcher wishes to study the effect of a new drug on blood pressure. Consider and discuss the following questions as you respond:

  • Would you recommend using a z-test, a t-test, or an ANOVA for the analysis? Explain your answer. 
  • What would your choice of test depend on? For the test you select, explain your design and your
    comparison groups. 
  • Would the hypothesis be directional or non-directional? 
  • Would the test be one-tailed or two-tailed? 
  • What would be the null and what would be the alternative hypothesis?
    Guided Response: Review your classmates’ posts. Respond to at least three of your classmates. Do you agree or disagree with the test selected by your peer? How does the number of groups being compared affect the statistical analysis? What suggestions would you make for change or improvement? Why would these suggestions potentially be more useful? 

PSY 325 Week 4 Assignment Research Report


PSY 325 Week 4 Assignment Research Report
Research Report. Due by Day 7. Write a research report based on a hypothetical research study. Conducting research and writing a report is common practice for many students and practitioners in any of the behavioral sciences fields.
A research report, which is based on scientific method, is typically composed of the different sections listed below:
  1. Introduction: The introduction states a specific hypothesis and how that hypothesis was derived by connecting it
    to previous research. 
  2. Methods: The methods section describes the details of how the hypothesis was tested and clarifies why the study
    was conducted in that particular way. 
  3. Results: The results section is where the raw uninterpreted data is presented. 
  4. Discussion: The discussion section is where an argument is presented on whether or not the data supports the
    hypothesis, the possible implications and limitations of the study, as well as possible future directions for this type of research. 
Together, these sections should tell the reader what was done, how it was done, and what was learned through the research. You will create a research report based on a hypothetical problem, sample, results, and literature review. Organize your data by creating meaningful sections within your report. Make sure that you:
  • Apply key concepts of inferential hypothesis tests. 
  • Interpret the research findings of the study. 
  • Examine the assumptions and limitations of inferential tests. 
  • Develop a practical application of the research principles covered in this course.
    Focus of the Research Report
    To begin, create a hypothetical research study (you do not have to carry out the study; you will just have to describe it) that is based on the three pieces of information listed below. Once you have your hypothetical study created, write a three- to four-page research report (excluding title and reference pages) that outlines the study. You are encouraged to be creative with your research study, but be sure to follow the format outlined below and adhere to APA formatting as outlined in the Ashford Writing Center.
Your hypothetical research study should be based on the following information:
• •
Recent research has indicated that eating chocolate can improve memory. Jones and Wilson (2011) found that eating chocolate two hours before taking math tests improved scores significantly. Wong, Hideki, Anderson, and Skaarsgard (2009) found that women are better than men on memory tests after eating chocolate.
There were 50 men and 50 women who were randomly selected from a larger population.
A t-test was conducted to compare men and women’s performance on an assessment after eating chocolate. The results showed an independent t-test value of t .05(99) = 3.43; p < .05
Your research study must contain the following:
1. Title Page
  1. a)  Title of your report 
  2. b)  Your name 
  3. c)  The course 
  4. d)  Instructor 
  5. e)  Date 
2. Introduction
  1. a)  Introduce the research topic, explain why it is important, and present the purpose of the paper and the research question and hypothesis. 
  2. b)  Discuss how this study is related to other research on the topic. 
  3. c)  Elaborate on the information from the references you were given. State how they relate to your hypothesis. 
  4. d)  Your introduction must: 
    • Consist of a paragraph explaining what you are studying and why. Use previously cited research to explain your expectations and discuss how those expectations led to your hypothesis. 
    • State a clear and testable hypothesis and whether it is one-tailed or two-tailed. Make sure it is understandable to someone who has not read the rest of your paper yet. State the null hypothesis. 
    • Include a justification of the direction of your hypothesis. In other words, explain why you chose the direction of your hypothesis if it is one-tailed (e.g., previous research suggests that people with big feet are more likely to score higher on math tests; therefore the hypothesis is one-tailed) or if it is two-tailed (e.g., previous research is not clear on which group will perform better; therefore, the hypothesis is two-tailed).
    • Describe why this study is important.
3. Method
4.
  1. a)  Design: State the experimental design of your study, the independent and dependent variables, and what the task was (e.g., what you had the participants do). 
  2. b)  Participants: Identify and describe your sample, how the participants were selected
    to be in the study, and why you chose them. Provide details for how each individual was assigned to each group. 
  3. c)  Procedure: Describe the precise procedure you used to conduct this research (i.e., exactly what you did). It should be clear enough that anyone could replicate your study. This is the subsection where you tell the reader how you collected the data. 
  4. d)  Data Analysis: Describe the statistical procedure used in the study to analyze the data.
    Results: In this section, you will describe the statistical results: 
  1. a)  State the statistical tests that were used. 
  2. b)  Justify the choice of test. 
  3. c)  State the observed value and significance level and whether the test was one or two-tailed. 
  4. d)  State your conclusion in terms of the hypothesis. 
  5. e)  Did you accept or reject the null hypothesis? 
5. Discussion: Discuss your results as they relate to your hypothesis.
  1. a)  Did you accept the hypothesis or reject it? 
  2. b)  Compare your results to the previous studies mentioned in the introduction. Are your results similar or different?
    Discuss why. 
  3. c)  Tell the readers what your findings mean. Why did you get the results you did? 
    • Identify limitations to your study. 
    • Suggest ways your study could be improved. 
    • Suggest ideas for future research, not just a continuation of your study, but research that is similar to this
      study. Perhaps one of the variables could be changed or a different sample could be investigated. 
    • Finish with a concluding paragraph that is a statement of your findings and the key points of the discussion.
  1. Conclusion: Write a paragraph detailing your experience with writing a research report. Discuss how easy/difficult it was to write a false report that reads like real results, and how this experience might affect you review research in the future. Do you think this experience will provide you with a useful skill in your potential career? 
  2. References: You will create a minimum of three fictitious references in the following format based on the information you have created in the preceding sections of the report: 
    • a)  Author, A., & Author, B. (Publication year). Title of the article. Journal Name, volume number(issue number), page numbers. 
    • b)  Example: Jones, A., & Williams, B. (2013). Why monkeys are good pets. Journal of Silly Science, 23(4), pp. 221-222. 
Writing the Research Report
The Assignment:

  1. Must be three to four double-spaced pages in length (excluding title and reference pages) and formatted according to
    APA style as outlined in the Ashford Writing Center. 
  2. Must include a title page with the following: 
    • Title of paper 
    • Student’s name 
    • Course name and number 
    • Instructor’s name 
    • Date submitted 
  3. Must document all sources in APA style, as outlined in the Ashford Writing Center. 
  4. Must include the sections with the appropriate headings and content listed above. 
  5. Must include a separate reference page, formatted according to APA style as outlined in the Ashford Writing Center. 

PSY 325 Week 4 Discussions Correlation


PSY 325 Week 4 Discussions Correlation
Correlation. 1st Post Due by Day 3. In this post, you will be challenged to look at how statistical tests, such as correlation are commonly used and the possible limitations of such analyses. In addition, you will need to identify the appropriate application of course-specified statistical tests, examine assumptions and limitations of course specified statistical tests, and communicate in writing critiques of statistical tests.
Much has been written about the relationship between students’ SAT test scores and their family’s income. Generally speaking, there is a strong positive correlation between income and SAT scores. Consider and discuss the following questions as you respond:

  • What does this correlation tell you? 
  • Is this correlation evidence that having a high family income causes one to have high SAT scores? 
  • Is this correlation evidence that high SAT scores are a cause of higher income? Or, does this tell you
    something else? Explain your answer. 
  • Explain why correlation alone is rarely sufficient to demonstrate cause.

PSY 325 Week 5 Discussion Chi-Square


PSY 325 Week 5 Discussion Chi-Square
Chi-Square. 1st Post Due by Day 3. The purpose of this discussion is to allow you to consider how various non- parametric tests are used and how they compare to other tests with similar variables. To do this, you will need to identify the appropriate application of course-specified statistical tests, examine assumptions and limitations of course-specified statistical tests, and communicate in writing critiques of statistical tests.

  • Describe the chi-square goodness-of-fit test. 
  • Provide a detailed explanation of what this test measures, and how it is similar to and different from the
    independent t-test and the chi-square test of independence. 
  • How do you know when to use one analysis over the other? Provide a real-world example.
    Guided Response: Review your classmates’ posts and respond to at least three of them. Compare the real-world examples identified by two of your classmates with the one you selected and respond substantively. Do you agree or disagree with their analyses of when to use one test over the other?