Making the world better, one answer at a time. Deodorant was around in ancient times but modern day deodorant was invented in 1888 by an inventor in Philadelphia, Pennsylvania.
Behavioral observations are a key component of cognitive psychology. Behavioral observations give cognitive psychologists a means of testing and evaluating theories about behaviors and a means of testing any predictions about those behaviors.
participant observation, n a method of qualitative research in which the researcher understands the contex-tual meanings of an event or events through participating and observing as a subject in the research. 1  Facebook. 2  Twitter.