Child Development 133 
Research Methods in Human Development

Sections 04, 68, & 69
Hembree           Spring, 2011


Correlational Research

I. Correlational strategies

A. Design issues - correlational vs. experimental strategies





B. Correlation Coefficients

1. Scatterplots




2. Positive and Negative (inverse) linear relationships






3. Curvilinear relationships





4. Calculating Pearson r (correlation coefficient)





II. Problems with interpreting correlations

A. restricted range



B. outliers



C. lack of reliability



D. correlation vs. causation






Send problems, comments or suggestions to:

California State University, Sacramento
College of Education
Department of Child Development

Updated: January, 2011