How To Read Correlation Matrix Spss

The types of correlations we study do not use nominal data.

How to read correlation matrix spss.

Use the following steps to create a correlation matrix for this dataset that shows the average assists rebounds and points for eight basketball players. Above and below the main diagonal. Precede the correlation matrix with a matrix data command. By default spss always creates a full correlation matrix.

To run a bivariate pearson correlation in spss click analyze correlate bivariate. The correlations on the main diagonal are the correlations between each variable and itself which is why they are all 1 and not interesting at all. Ordinal or ratio data or a combination must be used. When your correlation matrix is in a text file the easiest way to have spss read it in a usable way is to open or copy the file to an spss syntax window and add the spss commands.

The bivariate correlations window opens where you will specify the variables to be used in the analysis. A correlation matrix conveniently summarizes a dataset. This tutorial explains how to create and interpret a correlation matrix in spss. A correlation coefficient gets to zero the weaker the correlation is between the two variables.

The 10 correlations below the diagonal are what we need. In practice a correlation matrix is commonly used for three reasons. The rest of the output shown below is part of the output generated by the spss syntax shown at the beginning of this page. Pearson s r varies between 1 and 1 where 1 is a perfect positive correlation and 1 is a perfect negative correlation.

Each correlation appears twice. That s the pearson correlation figure inside the square red box above which in this case is 094. Click the analyze tab. This page shows an example correlation with footnotes explaining the output.

How to create a correlation matrix in spss. The plot above shows the items variables in the rotated factor space. These data were collected on 200 high schools students and are scores on various tests including science math reading and social studies socst the variable female is a dichotomous variable coded 1 if the student was female and 0 if male. Our figure of 094 indicates a very weak positive correlation.

In the syntax below the get file command is used to load the hsb2 data. Factor transformation matrix this is the matrix by which you multiply the unrotated factor matrix to get the rotated factor matrix. When to use a correlation matrix. And sometimes a correlation matrix will be colored in like a heat map to make the correlation coefficients even easier to read.

With respect to correlation matrix if any pair of variables has a value less than 0 5 consider dropping one of them from the analysis by repeating the factor analysis test in spss by removing variables whose value is less than 0 5. All of the variables in your dataset appear in the list on the left side. Also place the data within begin data and end data commands.