Agroup of researchers wanted to investigate allegations of sexual harassment on a company's assembly line. to make their observations, they took jobs working on the assembly line and pretended to be new employees. the best, most precise term to describe what the researchers were doing is

This is a Naturalistic observation.

Explanation:

What is a Naturalistic observation?

This is a research which involves observing people or animals or objects in their natural environment.

People or animals acts natural in their normal self when they don't feel like they are contained or constrained for observational purposes.

This is usually chosen if subjects to be studied will have their behaviour affected by being in a constrained environment such as the laboratory.

This will help researchers understand how people react to certain stimulant in real life when they are in their comfort natural environment.

answer; the parasympathetic nervous system;