To look in detail at your data, you sometimes need to create a variable that is the interaction of other categorical variables. You want to know not just how results differ between age groups or education level, but by age × education. The Crunch application lets you do this in just a few clicks by selecting the variables to interact — give the result a name (or accept the default of ‘x by y’) and you’re set:
A demo of creating a variable that is an interaction of other categorical variables:
Interactions can only be made with categorical variables. In future releases you will be able to edit and combine results at the time of creation; now, you may need to make such adjustments after the fact by combining categories.