What are the disadvantages of observation method of data collection?

what is observation in research?

Observation is the active acquisition of information from a primary source. In living beings, observation employs the senses. In science, observation can also involve the recording of data via the use of instruments.

The term may also refer to any data collected during the scientific activity. Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring.


Observation offers the researcher a distinct way of collecting data.

It does not rely on what people say they do, or what they say they think. It is more direct than that. Instead, it draws on the direct evidence of the eye to witness events first-hand.

It is a more natural way of gathering data. Whenever direct observation is possible it is the preferable method to use.

The observation method is a technique in which the behavior of research subjects is watched and recorded without any direct contact.

It involves the systematic recording of observable phenomena or behavior in a natural setting.


The purpose of observation techniques are:

  • To collect data directly. 
  • To collect substantial amount of data in short time span. 
  • To get eye witness first hand data in real like situation. 
  • To collect data in a natural setting.

Characteristics of observation as a data collection tool :

It is necessary to make a distinction between observation as a scientific tool and the casual observation of the man in the street.


Observation with the following characteristics will be scientific observation.

  • It is systematic. 
  • It is specific.  
  • It is objective.  
  • It is quantitative.  
  • The record of observation should be made immediately. 
  • Expert observer should observe the situation.  
  • It’s result can be checked and verified.

types of observation in research

Observation in research can be classified as a participant and non-participant

participant observation


In participant observation, the observer or researcher becomes more or less a member of the group under observation and shares the situation as a visiting stranger, an attentive listener, an eager learner, or as a complete participant-observer registering, recording, and interpreting the behavior of the group.

non participant obervation


in the non-participant observation, the observer or researcher observes through a one-way screen and hidden microphone. The researcher remains at distance and look, register, and record what is going on. he keeps his observation as inconspicuous as possible.

The purpose of non-participant observation is to observe the behavior in the natural setting. The subject will not shift his behavior or the respondent will not be conscious that someone is observing his behavior.

advantages and disadvantages of participant and non paericipant observation

The advantages and disadvantages of the participant and non-participant observation depend largely on the situation.


Participant observation is helpful in studying criminal activities or situations which necessitate the researcher to have intimate knowledge about the group.

It gives the researcher a better insight into how the group or respondents live and therefore it gives a more valid outcome.

The disadvantage of participant observation is that it is time-consuming as a researcher has to develop relationships with members of the group and there is a chance that the researcher will lose his neutrality, objectivity, and accuracy to rate things as they are.

Non-participant observation on the other hand is used in the situation in which the researcher can not interact with members of the group observed.

This type of observation permits the use of recording instruments and the gathering of large quantities of data.


Observation as a data collection tool has the following advantages.

  • Data are collected directly 
  • Substantial amount of data can be collected in a relatively short time span.
  •  Provides pre-recorded data and ready for analysis.  
  • In the observation reliability is high.

Disadvantages of observation as data collection tool in research

  • Establishing validity is difficult.
  •  Subjectivity is also there. 
  • It is a slow and laborious process. 
  • It is costly both in terms of time and money. 
  • The data may be unmanageable. 
  • There is possibility of bias.

However, observation is a scientific technique to the extent that it serves a formulated research purpose, planned systematically rather than occurring haphazardly, systematically recorded and related to more general propositions, and subjected to checks and controls with respect to validity and reliability.  

We hope that you have found this article useful. If you have any additional points you would like to share with us on the advantages of observation as a data collection tool, please add them on the comment below. 

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Observation is employed as a data-gathering technique in overseas market research. It has become the most refined modern research technique. The following are the merits of observation method:

Image: Observation – merits and demerits

1. Real and true

All data must originate in some experience or perception. As a scientific tool, it may range from the most casual to the most scientific, involving modern mechanical and electronic means. It meets the needs of a particular situation. Data collected through observation will be more reliable than data collected by any other method. Whenever direct observation is possible it must be pursued, as it is most reliable.

2. Chances of bias are limited

Observation underlies all research. It plays a prominent part in survey procedure. The general conditions of observation may be controlled by selecting the group, special form of stimuli and the observers. Moreover, data gathered through observation are immediately recorded. All these lead to less bias on the part of observer while conducting the marketing research.

3. Better insight into consumer behavior

Observation helps to obtain information which consumers are unwilling or unable to provide. Observation is indispensable for studies on infants who can neither understand our queries nor express themselves clearly. Observation is the only appropriate tool for non-cooperative persons who are unwilling to provide data on their behavior.

Demerits, disadvantages or limitations of observation in marketing research

Observation is subject to certain limitations. It can be carried out very easily in carefully controlled laboratory experiments. The money and time required to conduct an observation are often prohibitive.

1. Lack of competence of the observer

The lack of competence of the observer may hamper the validity and reliability of observation. The observer must have a clear perspective of the nature of the consumer behavior. He/she should also have a valid frame of reference and a freedom from personal bias.

2. Lack of clarity

The observer tends to see only the things which he wants to see. All human beings who are exposed to the same situations do not necessarily perceive the same thing. Various observers observing the same event report details which are influenced by observer’s strong personal interest, emotion, motivation, etc.

An observer must rely on his memory for construction of his observation. In such cases, he should record his observation immediately after an observation. Thus, the recording, if not proper, defeats the very purpose of observation.

3. Little control over physical situation

The subject matter of observation may be samples of rarely occurring behavior. The observer may fail to obtain an adequate sample of data on which he has to base his conclusions. He has little control over the physical situation. This is particularly true in an unstructured situation where so many things occur simultaneously and it becomes difficult to attend to them all.

4. Unmanageable data

The data may be unmanageable. There may be lack of agreement among the observers. So, huge but not a reliable data may get piled up.

5. Possibility of distortion

There is the possibility of distortion of the phenomena through the very act of observing. Observation is self interfering. It introduces in itself a bias, the direction and extent of which is relatively unknown. Such distortion is difficult to eliminate.

But it can be minimized through

  1. a proper choice and location of observers,
  2. inconspicuous recording; and
  3. other attempts at establishing observer neutrality.

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