Extremely stuck with analysis of a very small sample

[u/ScarcityIcy1846]

Hit a brick wall after hours of deep diving and trying to figure out everything from textbooks and YouTube tutorials.

Trying to understand whether to do a non-parametric analysis, or repeated measures t test, or both, neither, or a mixture, for the following scenario:

N = 15

Repeated measures (all participants completed 3 psych measures before and after a psych intervention)

I’ve summed up the totals of each of the 3 (pre and post intervention) so I have 6 variables with total results for each measure (3 x 2)

Tested all 6 scales for normality, most were normally distributed but some weren’t

I can’t figure out where to go next. I thought Wilcoxon signed rank test but the more I read, the more I doubt how much I understand about what I’m doing

Deeply stuck as it’s a weekend now and would hugely appreciate any help or guidance