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.
Webster Dictionary(5.00 / 1 vote)Rate this definition: 1  Observation(noun) the act or the faculty of observing or taking notice; the act of seeing, or of fixing the mind upon, anything. 2  Observation(noun) the result of an act, or of acts, of observing; view; reflection; conclusion; judgment.