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.
Full Definition of OBSERVATION. 1. a: an act or instance of observing a custom, rule, or law b: observance 3. 2. b: a record or description so obtained. 3. : a judgment on or inference from what one has observed; broadly: remark, statement.4. obsolete: attentive care: heed.5. I'm just making an observation about the style. 2  Her constant observations about the weather bored me. 3  These facts are based on close observation of the birds in the wild. 4  Observations made using the telescope have led to new theories. 5  Some interesting observations came from the study.