# U5d2-64 – need to know spss – interpret the correlation, nature of

IBM SPSS Step-by-Step Guide: Correlations.

U5D2- Interpreting Correlations

A meta-analysis (Anderson & Bushman, 2001) reported that the average correlation between time spent playing video games ( X ) and engaging in aggressive behavior ( Y ) in a set of 21 well-controlled experimental studies was .19.

*This correlation was judged to be statistically significant.

*In your own words, what can you say about the nature of the relationship?

Anderson, C. A., & Bushman, B. J. (2001). Effects of violent video games on aggressive behavior, aggressive cognition, aggressive affect, physiological arousal, and prosocial behavior: A meta-analytic review of the scientific literature. Psychological Science, 12(5), 353â€“359.

OBJECTIVES

To successfully complete this learning unit, you will be expected to:

1. Analyze the interpretation of correlation coefficients.

2. Identify the assumptions of correlation.

3. Identify null hypothesis testing of correlation.

4. Interpret a correlation reported in the scientific literature.

5. Analyze the assumptions of correlation.

Unit 5 Study 1

Use your Warner text, Applied Statistics: From Bivariate Through Multivariate Techniques , to complete the following:

• Read Chapter 7, “Bivariate Pearson Correlation,” pages 261–314. This chapter addresses the following topics:

◦ Assumptions of Pearson’s r.

◦ Preliminary data screening for Pearson’s r.

◦ Statistical significance tests for Pearson’s r.

◦ Factors influencing the magnitude and sign of Pearson’s r.

◦ Effect-size indexes.

◦ Interpretation of Pearson’s r values.

• Read Chapter 8, “Alternative Correlation Coefficients,” pages 315–343. This chapter addresses the following topics:

◦ Correlations for rank or ordinal scores.

◦ Correlations for true dichotomies.

◦ Correlations for artificial dichotomies.

◦ Chi-square test of association.