As far as I know, that's not possible with a slider. You will need to recode the data in post-survey analysis.The slider scale should range from 9 to 9 without 0 (zero): 9 8 7 6 5 4 3 2 1 2 3 4 5 6 7 8 9 These are 17 nuances. Such a scale is required for the questionnaire because of the method (Analytical Hierarchy Process), it has mainly mathematical reasons of the method why there shouldn't be a 0 (zero) in the middle. Currently, the slider question has two times the same value (which is good), but the middle value is 0 (zero)
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Slider questions with two times the same values - by: tpartner
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