Feature
One question at a time
Respondents see one question per screen, with a progress bar and a way back.
Each question fills the screen with large type and roomy answer options, so a form reads like a short conversation on a phone or a desktop.
Respondents can go back along the path they took. Their progress is saved on the server as they answer, so a reload does not lose anything.
The respondent pages work without JavaScript, and respondents never need an account.