What is an important design consideration when creating a questionnaire?

An important design consideration when creating a questionnaire is ensuring that questions are understandable. This is crucial because if respondents cannot comprehend the questions, the data collected may be unreliable or invalid. Clear and straightforward language increases the likelihood that respondents will accurately interpret what is being asked, leading to more reliable responses. Additionally, understandable questions help reduce the cognitive load on respondents, enhancing their engagement and willingness to complete the questionnaire. The clarity of questions directly impacts the quality of the data collected, making this consideration essential for effective survey design.