Please help -SPSS question

#1
I’m student at the University of Arizona. In my political science class, I need to use SPSS to calculate bivariate correlation between a categorical independent variable (Presidential or Parliamentary system) and a continuous dependent variable (various measures of democracy)

I’m using the Przeworski data set. My original independent variable in this set is called INST, which designates each state as a dictatorship 0, parliament democracy 1, mixed democracy 2, and a presidential democracy 3.

My question is: How do I recode this independent, categorical variable (INST) into two different variables (Presidential and Parliamentary), so it excludes the mixed democracies and dictatorships and allow me to run a correlation with my continuous dependent variables? So, I want to be able to recode INST into Presidential and Parliament variables and run them separately to see how each one correlates with my continuous dependent variables?


Thank so much,
Noah