Correlation between two ordinal variables
The steps for conduct a Spearman's rho correlation in SPSS
2. Click Analyze.
3. Drag the cursor over the Correlate drop-down menu.
4. Click on Bivariate.
5. Click on the first ordinal outcome variable to highlight it.
6. Click on the arrow to move the variable into the Variables: box.
7. Click on the second ordinal outcome variable to highlight it.
8. Click on the arrow to move the variable into the Variables: box.
9. Click on the Pearson box to deselect it.
10. Click on the Spearman box to select it.
11. Click OK.
The steps for interpreting the SPSS output for a Spearman's rho correlation
If the p-value is LESS THAN .05, then researchers have evidence of a statistically significant bivariate association between the two ordinal variables.
If the p-value is MORE THAN .05, then researchers have evidence that there is not a statistically significant association between the two ordinal variables.
Higher rho coefficients denote a stronger magnitude of relationship between variables. Smaller rho coefficients denote weaker relationships.
Positive correlations denote a relationship that travels at the same trajectory. As one value goes up, then the other value goes up. Also, as one value goes down, then the other value goes down too.
Negative correlations denote a relationship that travels in different directions. As one value goes up, the other value goes down. Also, as one value goes down, then the other value goes up.
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