Chapter 6 notes

Chapter 6 notes - Chapter 6 Correlational Research...

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Unformatted text preview: Chapter 6 Correlational Research Correlations • We generally hold many unscientific beliefs about the associations between events in the world. What are some examples? • In conducting correlational research we examine whether scores on two variables covary (vary together) Correlational Research • When we are interested in simply determining if two naturally occurring variables are related to one another then we conduct correlational research Correlation coefficients • A correlation coefficient is a statistic that indicates the degree to which two variables are related in a linear fashion • The only requirement for a correlational study is that we obtain scores on two variables for each participant in our sample Correlation coefficients • The Pearson correlation coefficient (r) is the most commonly used measure of correlation – The numerical value always ranges from -1.00 to 1.00 – It is interpreted based upon the sign (+,-) and the magnitude (number) Correlation coefficients • The sign: Indicates the direction of the linear relationship – Positive numbers indicate a direct linear relationship • Both variables increase or decrease together – Negative numbers indicate an i nverse linear relationship • As one variable increases the other decreases Correlation coefficients...
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This note was uploaded on 03/30/2008 for the course PSYC 2094 taught by Professor Trcunningham during the Fall '07 term at Virginia Tech.

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Chapter 6 notes - Chapter 6 Correlational Research...

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