I have seen a lot of survey web-pages (among others) that uses checkboxes (multi-selection) as radios (one selection only). The reason they do so is that in their code they have a variable that decides how many selections in one question that can be made. If this is set to 1, it simply limits it to 1 selection instead of using the radio input. I can see the reason for this code-wise. But whenever I see a checkbox I immediately think that I can pick more than one option, however I can not.
Basically my question is:
Shouldn't you, when creating a survey where you use checkboxes to limit the maximum number of pickable options use radios when only one option is pickable?
Yes, you should. But that won't be enough characters to answer the question.