Final answer:
An open question disguises a speaker's true motives by requiring a detailed response rather than a simple yes or no answer.
Step-by-step explanation:
A type of question that disguises a speaker's true motives is an open question. Open questions are ones that do not have a simple yes or no answer and require the respondent to provide a more detailed response. These types of questions allow the speaker to probe deeper into the respondent's thoughts and motivations while disguising their own true motives.