Conditional Fields in Forms - Dropdowns only?

Hello, I am looking to set up some conditional fields in some of our forms and I think I have gathered that the logic can only be set up with questions that are created with the drop down field. Is this correct? 

I understand it would probably be hard to set this up single/multi-line text boxes and other fields where the exact output would change. But if it was compatible with the radio button or a checkbox  fields that would also be helpful. 

Thanks in advance!