- Enter your data for your first
variable into the first column of the data file.
- Give the first column of data a
meaningful name by double clicking on the top of the column. Fill in the
‘variable name’ in the Define Variable box and Click OK.
- Enter your data for your second
variable into the second column of the data file.
- Give the second column of data a
meaningful name by double clicking on the top of the column. Fill in the
‘variable name’ in the Define Variable box and Click OK.
- Save the data file to a
meaningful place with a meaningful name. This file should have a .sav
extension.
- Click Analyze, Correlate and then
Bivariate. A “Bivariate Correlations” box will appear.
- Move your first variable to the
Variable box by clicking on it to highlight it and clicking on the arrow
button.
- Move your second variable by
clicking on it to highlight it and clicking the arrow button.
- Make sure the Pearson box is
checked. To check the box, simply click it and a check will appear.
- Click OK and wait a few seconds
for processing. The output will appear.
- Save the output to a meaningful
place with a meaningful name. SPSS should give the output file a .spo
extension.
- While keeping your output file
open, go back to the data file to create your scatterplot. Click “Graphs”
and then “Scatter.” A “Scatterplot” Box will appear.
- Make sure that the “Simple”
selection is selected in the “Scatterplot” Box by clicking it.
- Click the “Define” button.
- A “Simple Scatterplot” box will
appear. Move your first variable to the “Y axis” box by clicking on it to
highlight it and moving it with the corresponding arrow button.
- Move your second variable to the
“X axis” box by clicking on it to highlight it and moving it with the
corresponding arrow button.
- Click the OK button and wait a
few second for processing.
- Your scatterplot will appear in
your Output file. Save the output file again because it now contains some
new information.
- Look in your “Correlations” Box.
There will be four quadrants on the right and each will contain numbers.
Look for the quadrants that cross your two variables of interest.
- Look at the Pearson’s r (Pearson
Correlation) value in the appropriate quadrant.
- If a Pearson’s r value is
positive, you have a positive correlation between your two variables. If a
Pearson’s r value is negative, you have a negative correlation between
your two variables.
- The absolute value of Pearson’s
r will tell you how strong the relationship is between your two
variables..
- If a Pearson’s r score…
- Is close to 0, this means that
there is a weak relationship between your two variables.
- Is close to 1, this means that
there is a strong relationship between your two variables.
- Look at the Sig. (2-tailed) value
in your “Correlations” table. Some people think this value can tell you if
there is a statistically significant correlation between your two
variables. Other people think this value is affected to much by the number
of observations your make.
- If you are one of those people
who things that the Sig. (2-tailed) value is important, look at its’
value. If the Sig (2-Tailed) value is greater than 0.05, you can conclude
that there is no statistically significant correlation between your two
variables. On the other hand, if the Sig (2-Tailed) value is less than
0,05, you can conclude that there is no statistically significant
correlation between your two variables.
- Look at your scatterplot. Notice
if the dots in this plot seem to group together or if they are scattered
apart. If the dots appear to group together to form a line, you have a
strong correlation between variables. If the dots appear to be random and
too scattered, you have a weak correlation between variables.
- In your scatterplot, notice how
the grouping of your dots slopes. If your dots tend to slope upward from
zero, you can conclude that you have a positive correlation between
variables. If your dots tend start high from zero and gradually slope
down, you can conclude that you have a negative correlation. If the
grouping of your dots don’t seem to slope or if there is no grouping of
dots, you have a zero correlation between your variables, aka no
correlation.
- Report the type of tests used and
what they were used to test.
- Report the values for Pearson’s r
and your Sig. (2-tailed) value if you don’t have a problem with
significance testing in correlation .
- Make reference to your
scatterplot and include it as a graph in your APA style “Figures” section.
- Report your results in words that
people can understand.
Background
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Enter Data |
Analyze Data |
Interpret Data |
Report Data
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