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A variation on the Numeric question type is the Numeric List. This item provides the respondent with a list of answer options, and allows him/her to type numeric values into a field beside each option. This can for example be used to ask for quantities or values for several related items.
The question details page includes a number of fields and options. All the properties available for this question type are described in the Question Properties section (go to Accessing Question Properties for more information).
Figure 1 - The Numeric List item’s question details page
If upper and lower limits are defined, then the numeric list question can be displayed as a slider. When the limits are added then a check-box appears under the Required question property, and if this check-box is selected then a Slider behavior property becomes available. This allows you to specify the size of the slider and whether it is to be displayed horizontally or vertically.
You can convert a Numeric List question to a Single, Multi, Ranking or Open Text List. To do this, right-click on the item in the survey, select Convert to, then select the question type you require.
Note: For Numeric and Numeric List nodes, the default Column width of the respondent's input box is calculated from the constraints placed on the node by the Total digits, Decimals, Lower and Upper limit settings (go to Accessing Question Properties for more information). If these settings are altered then the default setting will be updated automatically when the survey is launched. The default setting will be overridden if you type a specific value into the Column field.
When designing this question, you can choose to add "Don't know" and "Prefer not to answer" options.
These options will appear beneath the question when users take the survey; selecting either option allows the user to continue without entering an answer in the field.
Learn more here: Don't Know and Prefer Not to Answer Choices.