From LimeSurvey Manual
Slider accuracy (slider_accuracy)
If the slider_layout is enabled, this question attribute sets the slider's step value. The Expression Manager can also be used (without curly brackets). However, please note that this value has to be calculated before the expression is displayed. For example, no custom value is used if the expression and the question and/or question answer codes used within the respective expression are displayed on the same page. If this happens, then the question attribute will use the default value which is 1.
- Any positive numerical value
- Expressions, without curly brackets.