iFrames can make problems with cookies, it depends on your server configuration (P3P), but also on participant's web browser configuration (3rd party cookies).
Easy solution: open the survey in a new tab/windows.
1. No more problem for cookies configuration
2. Much better look & feel on mobile devices.
3. No more distractors (anything around the survey which is not directly related to the survey (menus, borders, pictures, etc) is a distractor for the participants and will have an effect on the average quality of your datas. )
Easy solution: open the survey in a new tab/windows.
1. No more problem for cookies configuration
2. Much better look & feel on mobile devices.
3. No more distractors (anything around the survey which is not directly related to the survey (menus, borders, pictures, etc) is a distractor for the participants and will have an effect on the average quality of your datas. )