A selection field is an area containing one or more words, characters, or symbols that respondents either circle or mark through (tick) to indicate a response.
A typical example is when respondents are asked how often they do something, and the answer is provided by circling one of the responses. The area containing the alternatives is the selection field. Each alternative within the selection field is an object within the selection field.

Example of a selection field
Selection fields can have a variety of configurations, but there are rules about valid ways for respondents to select them.
Selection fields are treated the same way as indexed mark fields by Verify and Transfer.