Normality Tests
A normality test is used to determine whether sample data has been drawn from a normally distributed population (within some tolerance). Assumption of normality means that you should make sure your data roughly fits a bell curve shape before running certain statistical tests or regression, as we will see in the assumptions for the parametric tests.
Two of the most well-known tests of normality are the Kolmogorov-Smirnov Test and the Shapiro-Wilk Test (Lazar, 2017). The Shapiro-Wilk Test is more appropriate for small sample sizes (< 50 samples) but can also handle sample sizes as large as 2000.
For further reading about normality tests and how to use normality test using SPSS you may read this:
https://statistics.laerd.com/spss-tutorials/testing-for-normality-using-spss-statistics.php
To understand how to conduct a Shapiro-Wilk Normality Test in SPSS, watch this video:
To understand how to conduct a Kolmogorov-Smirnov Normality Test in SPSS, watch this video:
References
Lazar, J. , Feng, J. H., Hochheiser, H. (2017), Research methods in human-computer interaction: Morgan Kaufmann, 2017.
Sauro, J., and Lewis, J. R., (2016). Quantifying the user experience: Practical statistics for user research: Morgan Kaufmann.