BB cream is promoted as an all-in-one facial cosmetic product to replace serum, moisturizer, primer, foundation and sunblock. It can be worn alone as a tinted moisturizer, over serum and moisturizer as a regular foundation, and under powder, depending on the desired amount of coverage. 1  1 History.  2 Formulations.
Definition. Naturalistic observation is research that involves studying the subject of interest in its own environment, as it would occur in day-to-day life. The subject of interest may be human or non-human or it can be the behavior of living things or the interactions of non-living things with their environment.
Comparing positivist (or objectivist) and naturalist (or interpretivist) approaches to research: Positivist Naturalist. The purpose of research is to discover the truth. Realities are multiple, constructed, and holistic. The purpose is to understand meaning from the perspectives of the participants.Knower and known (or observer and observed) must remain separate to limit observer bias. Knower and known are interactive, inseparable.he purpose of research is to discover the truth. Realities are multiple, constructed, and holistic. The purpose is to understand meaning from the perspectives of the participants.