EPS 625 – RESEARCH ARTICLE REVIEW ASSIGNMENT NO. 1 ONE-WAY ANALYSIS OF VARIANCE

The purpose of this assignment is for you to become more familiar with extracting relevant information from a research article and gaining a further understanding of the One-way Analysis of Variance as it relates to the given study.

Review the applicable parts of the article Pain Experience and Expectations of Physiotherapy from a Cultural Perspective, by Kvarén, C. and Johansson, E. (2004).

You will not have to read the entire article to answer the following questions. Read the questions below and then make reference to the applicable sections in the article. Your responses must be typed, with the exception of symbols and formula calculations.

1. (1 point) Identify the two aims (purposes, goals) of this study.

2. (1 point) Identify the participant inclusion criteria the authors used for this study.

3. (1 point) The authors approached 85 patients to participate in this study. What was the final sample size used for analysis and why is this different from the original 85?

4. (1 point) The authors noted that some subjects did not fill in all of the information… Indicate how the authors avoided losing statistical power.

5. The authors conducted four separate one-way ANOVAs. Focusing on the first set of information (i.e., Sensory Pain)…

a. (1 point) Identify (operationally define) the dependent variable (and its scale of measurement).

b. (1 point) Identify (operationally define) the independent variable (and its scale of measurement). c. (1 point) The final analyzed sample sizes for this portion of the study was (Swedish n = 27, Iranian n = 23, and Iraqi n = 24). Is there a concern that the sample sizes are not identical? Explain why or why not.

d. (1 point) Identify/interpret each symbol and value associated with the results of this portion of the study: F(2, 71) = 8.01, p < .001.

e. (2 points) The authors did not report any pairwise effect sizes for this study. Using the formula below, calculate Cohen’s d for Pair 1) Swedish vs. Iranian and Pair 2) Swedish vs. Iraqi pairwise comparisons that were reported significant.

M  M 2 2 d  1 2 1   2 Cohen’s d where  pooled   pooled 2

Pair 1:

Pair 2:

Research Article Review Assignment No. 1 Page 2