What type of questions restrict responses to a simple 'yes' or 'no'?

Closed-ended questions are designed to elicit a specific, limited response, typically a straightforward 'yes' or 'no.' This format is advantageous in quantitative research because it allows for easy analysis of data. Closed-ended questions help researchers gather clear and concise information, making it straightforward to compare responses across different subjects.

In contrast, open-ended questions encourage elaboration and require respondents to provide more detailed answers, which can offer richer insights but are more complex to analyze. Shelf life questions and loyalty questions, while relevant in particular contexts, do not specifically refer to the structure of questions that limit responses to 'yes' or 'no.' Thus, closed-ended questions serve the specific purpose of restricting responses to these binary options.