This is probably ridiculously simple but because I have to include the word 'negative' in my searches I'm constantly finding only posts and websites that discuss negative correlation which isn't what I'm stuck on.
Essentially, I have two variables and want to explore their correlation. As one is ordinal I'll be using Spearman's rank order correlation. The other variable was originally test scores (0-100) but they were transformed (I don't know the procedure involved; the data is supplied from a large dataset) to account for the fact that some test items were harder than others. The transformation created logits (don't understand this) where the scores are now ranging from -3 to +2.
What I'm not sure about is whether I can run a correlation using one variable that includes both positive and negative values?