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RStats Statistics and Research Camp 2014

RStats Statistics and Research Camp 2014. Meta-Analysis Session 4. Melissa Maier, Ph.D. Assistant Professor Communication. Rationale. Narrative Review Meta-Analysis: Mathematical Reduce Type II error Correct statistical artifacts Test possible moderator variables

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RStats Statistics and Research Camp 2014

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  1. RStats Statistics and Research Camp 2014 Meta-Analysis Session 4 Melissa Maier, Ph.D. Assistant Professor Communication

  2. Rationale • Narrative Review • Meta-Analysis: • Mathematical • Reduce Type II error • Correct statistical artifacts • Test possible moderator variables • Evaluate theoretical arguments • Practical

  3. Method • Construct database of all relevant research • Analyze articles to determine (and correct): • Sample size • Effect size • Moderators • Calculate average effect size • Test for homogeneity • If heterogenous, test for moderators and outliers

  4. Calculate Ave. Effect Are female same-sex relationships more intimate than male same-sex relationships?

  5. Testing for homogeneity Test for homogeneity Χ2 = (d – ave d)2(N-k)

  6. Write-up • Justification for review • Methodology • Describe search methods • Code possible moderators (or model) • Describe statistical procedures • Results • Average effect • Number of studies, k • Overall combined sample size, N • Measure of variability • Evaluation of homogeneity • Measure of significance of average effect • Discussion

  7. Limitations of Meta-Analysis • Contextual restrictions • Unequal value of claims • Ethnographic trap • Multiplicity of interpretation • Misapplication of the level of analysis

  8. Supplemental Resources Burrell, N.A., Allen, M., Gayle, B.M., & Preiss, R.W. (Eds). (2014). Managing interpersonal conflict: Advances through meta-analysis. New York: Routledge. Hunter, J.E., & Schmidt, F.L. (1990). Methods of meta-analysis: Correcting error and bias in research findings. Newbury Park, CA: Sage. Hunter, J.E., & Schmidt, F.L. (2002). Methods of meta-analysis: Correcting error and bias in research findings (2nd ed.). Thousand Oaks, CA: Sage. Hunter, J.E., Schmidt, F.L., & Jackson, G.B. (1982).Meta-analysis: Cumulating research findings across studies. London: Sage. Lipsey, M.W., & Wilson, D.B. (2001). Practical meta-analysis. Thousand Oaks, CA: Sage. Preiss, R., & Allen, M. (1995). Understanding and using meta-analysis. Evaluation & the Health Professions, 18, 315-335. Preiss, R., & Allen, M. (2001). Understanding and using meta-analysis. In R. Preiss, B. Gayle, N. Burrell, M. Allen, & J. Bryant (Eds.), Mass media effects research: Advances through meta-analysis (pp. 15-30). Mahwah, NJ: Lawrence Erlbaum. The Meta-Analysis Calculator: http://www.lyonsmorris.com/ma1/

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