Really hope someone can confirm. I think I need to use Multivariate regression for this; -

one group of N judges score N performances and take a survey on personal characteristics X, Y, Z.

XYZ are the independent variables and are interval scales.

from performance/scoring data I will generate judging "severity" and "instability". These 2 variables are the dependent variables and also interval scale.

I want to examine if judges high/low in X, Y or Z or combination display more severity and/or instability.

So I need to use multivariate regression correct!?

Thanks in advance.