differentiate between direct personal investigation ,indirect oral investigation , information from correspondents and questionnaires filled by enumerators on any 6 basis
Answers
Answer:
(iii) Through local correspondents.
(iv) Mailed Questionnaire.
(v)Schedules sent through enumerators.
1. Direct personal Investigation:
ADVERTISEMENTS:
Here, the investigator himself visits the persons those are source of the data and collects necessary information either through interview with the persons concerned or through observation of the data on the spot. This method is suitable where intensive study of any phenomenon is required.
This method has many merits and demerits which are given as following:
Merits:
1. The data is more reliable as they are obtained directly.
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2. Sensitive questions can be avoided.
3. There is chance of more response in it.
4. The questions can be adjusted according to the standard of the sources.
5. There is uniformity in data.
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Demerits:
1. It is not suitable where the field is very vast and wide.
2. It is very much expensive.
3. It needs a large number of enumerators.
4. It takes long time to collect the data from all the persons.
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5. It is purely subjective in nature, therefore the success of investigation depends mostly intelligence, skill, tact, insight, honesty and other qualities of investigators.
Suitability:
This method is suitable when:
1. Area of investigation is limited.
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2. A very high degree of accuracy is required.
3. The result of investigation is to be kept secret.
4. Area of investigation is homogeneous i.e. having same qualities
1. Investigator should be trained and skilled.
2. Investigator should not have personal bias.
3. Investigator should be polite and questions should be simple.
4. Investigator must belong to the culture of the informant.
2. Indirect Oral Investigation:
Here, the investigator collects the data indirectly by interviewing persons who are known to be close to the original persons or the incidence. This method is adopted when the original persons are not found or found to be reluctant to provide the required information. In this method a list of questions is prepared, and the witnesses are invited and made to answer the questions. The answers are recorded by the investigators.
This method has its merits and demerits also:
Merits:
1. It can cover a wide area.
2. It needs less time, energy and money.
3. Third party does not conceal the facts.
4. Intelligence, skill and tact of the investigator brings accuracy.
5. It is simple and convenient.
Demerits:
1. The information obtained from the other persons may not be reliable.
2. The third parties may be biased.
3. The witness chosen may not be proper for the cause or not expert in this field.
Suitability:
This method is suitable when:
1. The direct approach to sources does not exist.
2. The person cannot be relied upon
3. The area of investigation is large.
4. The information is needed, is kept secret from person.
Precautions:
1. Witnesses should not be biased about the subject.
2. Respondent or witness should have adequate knowledge about the person, whose information is to be received.
3. Number of witnesses should be large.
4. A cross check must be undertaken by investigator.
3. Information through Local Correspondents:
In this method, the investigator does not work but appoints local agents or enumerators in different parts of the area. These agents or enumerators are asked to collect information and transmit it to the investigator. This method is often adopted by government, semi-government and bigger private institutions to collect the information for any purpose.
Following are the merits and demerits of this method:
Merits:
1. This method is cheap or economical.
2. There is economy of time and labour in this method.
3. This method can be used where the area of inquiry is wide.
4. Quality of data is better as enumerators are trained.
Demerits:
1. Data are not reliable which are collected by this method.
2. If high degree of accuracy is required this method is not adopted.
3. The data are not original if collected by this method.
4. Collected data lack uniformity because they are collected by different correspondents and they differ in quality and taste.
Suitability:
This method is suitable when:
(i)Rough and approximate estimates are required.
(ii)The information is wanted at regular intervals.
(iii) The field of inquiry is
Explanation:
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