This activity demonstrates how a simple correlation analysis can be carried out. Correlations tell us about the relationship between pairs of variables. For example:
weight and height;
age and language learning performance.
The example used in this activity relates to the relationship between serotonin levels and reported depression symptoms. The expectation is that will be a relationship between these variables, and specifically, the hypothesis predicts that ‘there is a negative correlation between serotonin and depression score’.
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You can download this SPSS file from this tutorial here.