Question

# A teacher wanted to see if social anxiety affects performance on an oral assignment. To examine...

A teacher wanted to see if social anxiety affects performance on an oral assignment. To examine this, students completed social anxiety scales and were classified into “low,” “average,” and “high” levels of social anxiety. The data presented in the table below are the oral presentation grades (in percentages) earned by the 45 students separated by their social anxiety classification. Conduct the most appropriate statistical analysis to determine whether grades on the oral assignment differed based on level of social anxiety.

 Oral presentation grade (%) Low social anxiety Average social anxiety High social anxiety 72 80 77 68 85 71 73 73 73 75 81 69 97 73 90 73 91 74 95 73 76 88 73 67 89 71 81 97 75 75 88 78 68 89 90 79 93 89 58 89 88 83 79 75 81

1) What is the dependent variable and its scale of measurement in this scenario?

2) State the independent variable in the scenario, its scale of measurement, and its number of levels.

3) Paste appropriate SPSS output.

4) Calculate and interpret the effect size.

5) Paste appropriate SPSS graph, formatted in APA. Write an appropriate figure caption using APA conventions.

6) Write an APA-style Results section based on your analysis. All homework “Results sections” should follow the examples provided in the presentations and textbooks. They should include the statistical statement within a complete sentence that mentions the type of test conducted, whether the test was significant, and a decision about each null hypothesis tested. Include effect sizes, post hoc analyses / interpretations, and refer the reader to Figure(s) created above, when appropriate. 7) Identify a potential confounding variable with the study as it was presented (you can use your imagination!). Justify why you think it may be a confounding rather than an extraneous variable.

1. The Dependent Variable is grades received by the students in oral assignments. The scale of measurement is the percentage of marks obtained by the students in oral assignment.

2. The Independent Variable is social anxiety which is measured using a scale for social anxiety classification .

3.  ANOVA grades Sum of Squares df Mean Square F Sig. Between Groups 196.311 2 98.156 .537 .589 Within Groups 7679.333 42 182.841 Total 7875.644 44

4. According to the results, there is no significant difference between the three groups of anxiety.

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