Hello everyone, I'm working with categorical data on likert scale (4 scales) referred to the same sample of people (70 obs.) at Time0 and Time1. I have, for exemple, 9 different questions on a particular theme at the two different times.
It is the first time I work with this kind of data. I have already computed the frenquencies and represented them in a bar graph, someone could suggest me some index to calculate in order to show the differences between the ditributions in the two periods?
If I verify that my data are normally distributed can I use a paired t-test? It is statistically correct given that data are not continuos?
Some other ideas?

Thank you in advance.