Answer:
Direct survey
Step-by-step explanation:
In a direct survey, the researcher involved in the study will accompanied the subjects from the beginning till the end of the surveys. They can either do this by making the subject taking the survey directly in front of them or by letting the subjects fill their survey in private setting but conducting a regular check up through phones or email.
The purpose of this survey is to control the data that taken from the survey. Often times, subjects of the survey will not fill the survey seriously when left in their own privacy. Direct survey will make the data a little bit more reliable.