Naturalistic observation is a research tool in a subject is observed in its natural habitat without any manipulation from the observer. Some advantages of naturalistic observations are: seeing the subject in its natural environment, it provides better data than lab research, and he observer is able to go experience different opportunities. There are a good amount of advantages when discussing naturalistic observation, but there are some disadvantages too. If the subject knows it is being observed, it may act different. So it is the job of the observer to be as careful as possible to not be seen to make the situation as realistic as possible. Another disadvantage is that different observers viewing the same thing may have differing opinions. The natural environment causes the subject to be more free leading to more observational opportunities, which may cause bias because we have no control of what happens, but when in a lab, the subject may be controlled and results will be similar from different observers. Overall, i believe that naturalistic observation is the strongest form of observation if the subject is completely unaware that someone is watching. It can provide you answers that aren't manipulated which can be more useful when relating things to the real world and when doing studies on topics that rely on natural observational studies to be affective.