This series of 11 web pages shows the steps one would take to compute test-retest reliability, split-half reliability, and coefficient alpha using SPSS for Windows 9.0. The examples here are based on 81 college students who took the 10-item Rosenberg Self-Esteem Scale (SES) twice over a two-month period.
Computing test-retest reliability is the easiest, so let's start with that.
Note: Your computer must be able to display graphics for this tutorial. If you have a very slow computer connection, web pages may load slowly because of the large graphics. Please be patient.
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