Assignment:
IBM SPSS Step-by-Step Guide: Correlations.
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?
Reference
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.
Use your Warner text, Applied Statistics: From Bivariate Through Multivariate Techniques , to complete the following:
• Read Chapter "Bivariate Pearson Correlation,". The 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 , "Alternative Correlation Coefficients,". The chapter addresses the following topics:
? Correlations for rank or ordinal scores.
? Correlations for true dichotomies.
? Correlations for artificial dichotomies.
? Chi-square test of association.