By at November 24 2018 10:34:31
In paper forms the specific sub-questions cannot be hidden from the user when they are not relevant to them - but in interactive forms this is relatively easy to do. Use progressive revealing as much as possible in your form design to shield your users from questions they do not need to see.
Make the form sections visually distinct by setting the section name in bigger and bolder type, and consider including a contents list on the first page or screen to help people navigate their way through the form. Also make sure that you make good use of features like running headers and footers on every page to remind people what the form is, where they are, and what page number they are on.