Define and Measure VariablesActivity Warm-Up Activity 2.1: Review Validity and ReliabilityRead Chapter 3 in your textbook, Research methods for the behavioral sciences, and then examine how research defines and measures a variable in a study. Consider how a variable is valid and reliable as well as the type of validity and reliability used.Textbook:Gravetter, F. J., & Forzano, L. Research methods for the behavioral sciences Belmont, CA WadsworthWarm-Up Activity 2.2: Preparing a ChartTo prepare a chart for use in an assignment is quite easy. A chart is essentially a table in which you have established categories for review. To create a table in Word, you will need to go to Insert>Insert Table, then select the number of columns and rows you desire.AssignmentYour task for this week requires you to examine the following provided article:General Psychology:Fox, J. & Warber, K. M. (2014). Social networking sites in romantic relationships: Attachment, uncertainty, and partner surveillance on Facebook. Cyberpsychology, Behavior, and Social Networking, 17(1). DOI: 10.1089/cyber.2012.0667After you have read the article, prepare a chart in which you address the following:1. Examine the sample and measurement the authors obtained. Then, answer the following questions:a. Identify each of the variables measured in the article.b. For each variable, identify if the variable was measured directly (like height or weight), or if the researchers used an operational definition to measure a hypothetical construct (such as motivation or quality of life).c. Determine if the article used an operational definition for a variable. If so, what was it? Did this seem appropriate?d. Determine the scale of measurement (nominal, ordinal, interval, ratio).e. Identify the modality of the measurement (self-report, behavioral, physiological).f. Determine the measurement align well with the research question and hypotheses. Why or why not?For example, your chart may be set up like this:When you have completed your analysis of the provided article, reflect upon one of the topics you selected in Week 1 that you likely would pursue in your capstone.Capstone Topic: childhood obesityQuestion: What are some of the perspectives of development on childhood nutrition and obesity? Hypothesis: Childhood obesity needs to be examined and analyzed from a development perspective.Peer reviewed Article on Factors that influence Nutrition“Developmental Perspectives on Nutrition and Obesity from Gestation to Adolescence”(Huang, Layla, Esposito, Fisher, Mennella & Hoelscher, 2009).Link: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2722408/In an essay, identify the variables in your research question and hypothesis.• Can each variable be measured directly?• If not, how might you use an operational definition to measure the variable(s)? Describe the potential measures to test your hypotheses.Discuss how validity and reliability are important in evaluating the quality of any measurement, and how validity and reliability are important for testing your hypothesis.Length: 1 page chart; 2-3 pages for essayYour paper should demonstrate thoughtful consideration of the ideas and concepts presented in the course by providing new thoughts and insights relating directly to this topic. Your response should reflect scholarly writing and current APA standards.
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