No Compound Questions
Also known as: Double-Barreled Questions
The rule requiring each question to address only one construct.
Full Definition
Compound questions ask multiple things at once, producing ambiguous responses where it is impossible to know which part of the question the interviewee is answering. Responses to compound questions cannot be reliably compared across interviews. Each question must be broken into single constructs asked sequentially.
Example
'How do you handle documentation and do you find it straightforward and what tools do you use?' The interviewee answers the easiest part. The interviewer doesn't know which part that was.