Child Development 133 
Research Methods in Human Development

Sections 01 & 05
Hembree            Fall, 2012

 

Correlational Research

I. Correlational strategies

A. Correlational vs. experimental strategies

 

 

 

 

B. Correlation Coefficients

1. Scatterplots

 

 

 

2. Positive and Negative (inverse) linear relationships

 

 

 

   

 

 

 

3. Curvilinear relationships

 

 

 

 

 

4. Correlation coefficient

 

 

 

 

 

II. Problems with interpreting correlations

A. restricted range

 

 

 

B. outliers

 

 

 

C. lack of reliability

 

 

 

D. correlation vs. causation

 

 

 

  • .  third variables (and spurious correlations)

 

 

  • partial correlations

 

 

 

DISCUSSION

 

 

 

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Send problems, comments or suggestions to: hembrees@csus.edu

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

Updated: August, 2012