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Detailed explanation-1: -Unstructured observation: This approach is best used to look at a single situation, for example, examining the experiences of elderly people admitted to care. In this situation the researcher will take numerous field notes, and may use tape or video recording. There is a predetermined schedule of events or activities.

Detailed explanation-2: -Observation is a systematic data collection approach. Researchers use all of their senses to examine people in natural settings or naturally occurring situations. Observation of a field setting involves: prolonged engagement in a setting or social situation.

Detailed explanation-3: -Another approach to data collection in observational research is participant observation. In participant observation, researchers become active participants in the group or situation they are studying.

Detailed explanation-4: -In the participant as observer stance, the researcher is a member of the group being studied, and the group is aware of the research activity.