There is a large body of research devoted to exploring quality in interpreting and various authors have identified survey methodology as one of the most frequently applied to this line of research. However, this line of research lacks fundamental and principled guidance regarding survey methodology, in spite of a fairly rich literature on survey design. This paper attempts to remedy this by developing a succinct, yet comprehensive guide to questionnaire design for quality research in interpreting, covering important concepts such as validity, reliability, construct design and ethical dimensions.