Everyone loves sliders. Not the eating kind of course, but the data-collecting kind.
We conducted three survey experiments to test out the best way for creating a slider question.
Here’s what we learned.
Figure 1. Fully labeled satisfaction multiple-choice question
Figure 2. End labeled satisfaction multiple-choice question
Figure 3. Slider satisfaction multiple-choice question
Experiment #1 – 5-point scales
In the first experiment, we compared two types of traditional 5-point multiple-choice questions with the slider question. We compared the response means for the 13 questions we asked in the survey. Other than questions #7-8, there was no significant difference between the traditional multiple-choice and slider questions.
The completion rates were also very similar across the three types of questions. In addition, we examined the responses from mobile devices and PC devices separately. What’d we learn? Same results. This suggests that a slider can indeed be a viable alternative to the more traditional multiple-choice questions.
Experiment #2 – 7-point scales
Because 7-point scales are popular as well, we replicated the questions in Experiment 1 but asked 7-point scales. As Figure 5 shows, there are some variations across the three types of questions but the differences are small enough for us to conclude that multiple-choice and slider questions are providing very similar survey responses.
We also looked at mobile respondents and non-mobile respondents separately and we found that their answers were similar across the three types of questions.
Experiment #3 – 101-point scales
Since the slider can go from 0 to 100, we decided also to test full scale of sliders and compare those with open-ended text box questions where the respondents have to type in a number from 0 to 100. We found that response mean between slider and text box were similar. However, text box respondents were significantly more likely to give an answer that was a multiple of 10. This is often seen as a less precise answer.
What this means for you—3 tips to keep in mind
- The next time you’re trying to decide between a multiple-choice and a slider question for either a 5-point or 7-point scale? No worries—you can go with either question type.
- If you’re thinking about using a longer scale, e.g., from 0 to 100, we’d recommend using slider question type over open-ended comment box question types.
- Questions without a clear cut off point such as, “In a typical month, about how many hours do you volunteer?”, whether you choose a “0 to 40 hours” or “0 to 100 hours”, a slider can change the way your respondents answer the question. In this particular case, ask an open-ended question rather than a slider or a multiple-choice question.