16. A researcher is observing how people interact in a mall during the month of December. The researcher sits on a bench and keeps detailed field notes about the interactions he sees. He doesn't have...

16. A researcher is observing how people interact in a mall during the month of December. The researcher sits on a bench and keeps detailed field notes about the interactions he sees. He doesn't have a hypothesis or a specific set of behavior he is looking for, he is just watching how people interact, and he is taking notes on those interactions.  What type of design is he conducting?