Multiple numerical input: Slider - no movement = "NAN"? - by: ALehner

Hi there,

I have a question regarding the slider function for the question type "Multiple numerical input":

In our survey we want to use the slider with min value: 1 and max value: 9;

--> We use the stated numbers for the next question as we calculate a mean and show it to the participant in table.

The problem is that if the participant does not move the slider at least once, we cannot do calculations because no number was stated and we get "NAN" in the table.

There is the possibility to set a "Slider initial value" but still, if the participant does not move the slider no number will be recognized and "NAN" will be stated. The setting of an initial value has an influence on the site where the slider is shown but does not influence a possible value that can be used later for calculations.

Is there a possibility within Limesurvey to do a workaround or is there a function that could solve that problem?
(Using the Online Version)


If the description of the problem was to vague plz do not hesitate to call back.

Thanks in advance!