By default, questions are optional. To make a question required, uncheck Optional in the Options settings for the question.
The following question types cannot be made required as as whole, but their answer choices or variables can be made required:
- Text Response Grid
- Multiple Choice Grid
- Dropdown Grid
- Checkbox Grid
- 3D Matrix
- Semantic Differential
To make question’s answer choices or variables required, either uncheck Optional for each variable or choice, or right click on the question and select Mark selected as required to make all choices required.