

Observation is indispensable for studies on infants who can neither understand the quarries of the researcher nor express themselves clearly. Observation can deal with phenomena which are not capable of giving verbal information about their behaviour, feeling and activities simply for the reason that they cannot speak e.g. (5) Observation is the Only Appropriate Tool for Certain Cases: As a common method, it is very easily followed and accepted. So it has greater universality of practice. Observation is a common method used in all sciences, whether physical or social. So very often the data collected through observation is more reliable than these collected through interview or questionnaire. He can apply various devices to test the reliability of their behaviour. But in observation the observer can directly check the accuracy from the observed.

So these are indirect methods and here the investigator does not have any means to examine the accuracy of the data supplied by them. This is a problem for anyone within an organisation doing any evaluation work.In other methods like interview, questionnaire etc., the researcher has to depend on information provided by the respondents. There is always the danger that we will see what we expect, or want, to see.
OBSERVATION METHOD FULL
In participant observation, the researcher take a full part. Naturalistic (or nonparticipant) observation happens when a researcher doesn’t intervene and studies behaviour that occurs naturally. It can involve just watching people, listening to everyday conversations, interviewing individuals and or groups, filling questionnaires and checklists. Both have strengths and weaknesses which are often linked to how much an evaluator or researcher has influenced the environment and it’s subjects.

At the other is participant observation where the researcher joins the group to understand behaviour and changes. At one end is the controlled observation, where the researcher completely manages the environment. You can use observational research in different ways. It lets the researcher describe situations under study using the five senses. Observation is most common in psychology and other social sciences.

Most simply it is learning through observing and documenting. Observation is a method in which a person observes behaviour to note changes in people or places, typically as the result of an intervention.
