For some studies it might be neccessary to ask for the marital status and find
out whether people do have partner or not, depending on the hypothesis.
Marital Status as drop-down menu
With drop-down menus one can save a lot of space and kinda pretend
to have a short survey. However, one should still be careful applying
drop-down menus and consider that a user needs more time to choose the
appropriate answer in a drop-down menu than in choosing the right
radio button or a check box. In some cases drop-down menus are, on the
other hand, the only choice, especially when the list of possible
answers to choose from is rather long. From cognitive psychology we
know that the human being is able to comprehend up to six elements at
the same time, hence drop-down menus should only be used with more
than 7 possible answers.
This is what it could look like:
Your marital status:
Marital Status with radio buttons
To display the marital status with radio buttons is surely the best
alternative.