Final answer:
The primary burden of respondent understanding is placed upon the questionnaire in self-administered surveys.
Step-by-step explanation:
A disadvantage of self-administered surveys is that the primary burden of respondent understanding is placed upon the questionnaire. In self-administered surveys, there are no interviewers present to clarify any confusion or provide further explanations. This means that it is solely up to the respondents to understand and interpret the questions correctly.