Pretest and posttest Likert scale data analysis

Hi everyone, I need help analyzing Likert-scale pre- and post-test data.

I conducted a study where participants filled out the same questionnaire before and after an intervention. The questionnaire includes 15 Likert-scale items (1–5), divided into three categories: 5 items for motivation 5 items for creativity 5 items for communication

I received 87 responses in the pre-test and 82 in the post-test. Responses are anonymous, so I can’t match individual participants.

What statistical tests should I use to compare results?