What defines a Text Set in survey design?

A Text Set in survey design is defined as a field that contains a limited number of possible values. This is particularly useful for situations where you want to restrict the responses to a predefined list, ensuring consistency and facilitating easier data analysis. By having a set number of text options, the survey can provide clearer choices for respondents while also allowing for easier management and reporting on the responses.

The other options describe different types of fields that serve distinct purposes in survey design. A field that contains a single value is more relevant to fields like a dropdown or a radio button where the respondent can select only one option. Open-ended response fields allow for unlimited and unstructured text input, which does not fit the definition of a Text Set as it lacks a limited selection. A field that accepts only numerical input is designated for quantitative responses and does not apply to the nature of text-based options that a Text Set provides.