I'm debating whether to use a radio button or a slider for a survey. My thoughts at the moment are the following. I'd like the group's views and / or links to research which has studied something similar.
The question will ask for agreement on a statement. Here are my thoughts so far:
Radio buttons (5 point scale)
- They're conventional / well known
- They are easy to use on touch and non-touch devices
- We're forcing the user to 'bin' their perception, which is on a continuum, to one of 5 positions
- The data needs to be treated as ordinal & as there are only 5 possibilities the available analytic / visualisation choices are limited
- labelling. Is 'strongly agree' 2X stronger emotion than 'agree' or 1.5X (or any other amount). We know there are cultural differences in Likert selection. Multiple languages makes this even more of an issue.
Slider (Continuous, two extremes labelled, no labelling on position)
- The control is a continuum, which reflects the users perceptions
- I think I can more safely assume that the user interprets the position as linear and can therefore treat the values as interval
- There is an accuracy issue with the data (are two questions slightly with slightly different positions meant to be the same?) This is likely to depend on the device.
- There is less guidance / feedback in the form of labelling for the user.