Briefly discuss mechanical observation. What is it and why is it used? Describe two devices used for mechanical observation that do not require the respondent's direct participation

What will be an ideal response?

In mechanical observation, mechanical devices, rather than human observers, record the phenomenon being observed. These devices may or may not require the respondents' direct participation. They are used for continuously recording ongoing behavior for later analysis. Of the mechanical devices that do not require respondents' direct participation, the Nielsen audimeter is best known. The audimeter is attached to a television set to continually record what channel the set is tuned to. Recently, people meters have been introduced. People meters attempt to measure not only the channels to which a set is tuned but also who is watching. Other common examples include turnstiles that record the number of people entering or leaving a building, and traffic counters placed across streets to determine the number of vehicles passing certain locations. On-site cameras (still, motion picture, or video) are increasingly used by retailers to assess package designs, counter space, floor displays, and traffic flow patterns. Technological advances such as the Universal Product Code (UPC) have made a major impact on mechanical observation. The UPC system, together with optical scanners, allows for mechanized information collection regarding consumer purchases by product category, brand, store type, price, and quantity.