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Methods of data collection

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Meaning

The task of data collection begins after a researchproblem has been defined and research design/plan chalked out.

Primary Data:- The primary data are those which are collected

afresh and for the first time, and thus happen tobe original in character.

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Continued

The secondary data, on the other hand, are thosewhich have already been collected bysomeone elseand which have already been passed through thestatistical process.

The methods of collecting primary and secondary datadiffer since primary data are to be originally collected,while in case of secondary data the nature of datacollection work is merely that of compilation.

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Methods ofCollecting Primary Data

Observation method,

Interview method,

Through questionnaires,

Through schedules

Other methods which include warranty cards distributor

Audits

pantry audits

consumer panels

using mechanical devices

through projective

Techniques

depth interviews

content analysis

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Observation Method

In this method the information is sought by way ofinvestigators own direct observation without askingfrom the respondent.

For instance, in a study relating to consumer behaviour,the investigator instead of asking the brand of wristwatch used by the respondent, may himself look at thewatch.

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Advantages

subjective bias is eliminated if observation is done accurately.

the information obtained under this method relates to what iscurrently happening; it is not complicated by either the pastbehaviour or future intentions or attitudes.

this method is independent ofr

espondents willingness tor

espondand as such is relatively less demanding of active cooperation onthe part of respondents as happens to be the case in the interviewor the questionnaire method

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Limitations

it is an expensive method

the information provided by this method is

very limited sometimes unforeseen factors may interfere

with the observational task

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Structured Observation

the observation is characterized by a careful definitionof the units to be observed, the style of recording theobserved information, standardized conditions ofobservation and the selection of pertinent data of

observation, then the observation is called asstructured observation.

appropriate in descriptive studies

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Unstructured Observation

When observation is to take place without

these characteristics to be thought of in

advance, the same is termed as unstructured

observation.

appropriate in Exploratory studies

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Participant Observation

If the observer observes by making himself,

more or less, a member of the group he is

observing so that he can experience what the

members of the group experience, the

observation is called as the participant

observation.

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Non- Participant Observation

when the observer observes as a detachedemissary without any attempt on his part toexperience through participation what others

feel, the observation of this type is oftentermed as non-participant observation.

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Merits

The researcher is enabled to record the naturalbehaviour of the group.

The researcher can even gather information which

could not easily be obtained if he observes in adisinterested fashion.

The researcher can even verify the truth of statementsmade by informants in the context of a questionnaireor a schedule

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Demerits

The observer may lose the objectivity to theextent he participates emotionally;

The problem of observation-control is notsolved;

It may narrow-down the researchers range ofexperience.

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If the observation takes place in the naturalsetting, it may be termed as uncontrolledobservation, but when observation takes place

according to definite pre-arranged plans,involving experimental procedure, the same isthen termed controlled observation.

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Interview Method

The interview method of collecting datainvolves presentation of oral-verbal stimuliand reply in terms of oral-verbal responses.

This method can be used through personalinterviews and, if possible, through telephoneinterviews.

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Types

Personal interviews:-

Focused interview,

Clinical interview

Non-directive interview

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Merits of Interview Method

More information and that too in greater depth can be obtained.

Interviewer by his own skill can overcome the resistance, if any, of therespondents; the interview method can be made to yield an almostperfect sample of the general population.

There is greater flexibility under this method as the opportunity to

restructure questions is always there, specially in case of unstructuredinterviews.

Observation method can as well be applied to recording verbal answers tovarious questions.

Personal information can as well be obtained easily under this method.

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Continued

Samples can be controlled more effectively as there arises no difficulty of themissing returns; non-response generally remains very low.

The interviewer can usually control which person(s) will answer the questions. Thisis not possible in mailed questionnaire approach. If so desired, group discussionsmay also be held.

The interviewer may catch the informant off-guard and thus may secure the most

spontaneous reactions than would be the case if mailed questionnaire is used. The language of the interview can be adopted to the ability or educational level of

the person interviewed and as such misinterpretations concerning questions canbe avoided.

The interviewer can collect supplementary information about the respondentspersonal characteristics and environment which is often of great value ininterpreting results.

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Demerits

It is a very expensive method, specially when large and widely spreadgeographical sample is taken.

There remains the possibility of the bias of interviewer as well as that ofthe respondent; there also remains the headache of supervision andcontrol of interviewers.

Certain types of respondents such as important officials or executives orpeople in high income groups may not be easily approachable under thismethod and to that extent the data may prove inadequate.

This method is relatively more-time-consuming, specially when thesample is large and recalls upon the respondents are necessary.

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Continued

The presence of the interviewer on the spot may over-stimulate therespondent, sometimes even to the extent that he may give imaginaryinformation just to make the interview interesting.

Under the interview method the organisation required for selecting,training and supervising the field-staff is more complex with formidable

problems. Interviewing at times may also introduce systematic errors.

Effective interview presupposes proper rapport with respondents thatwould facilitate free and frank responses. This is often a very difficultrequirement.

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Pre-requisites and basic tenets of interviewing:-

interviewers should be carefully selected, trained andbriefed,

They should be honest, sincere, hardworking, impartialand must possess the technical competence andnecessary practical experience,

Occasional field checks should be made,

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Continued

if some of the selected respondents refuse to

cooperate or are not available when an

interviewer calls upon them, some provision

should also be made in advance,

create friendly atmosphere of trust and

confidence,

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Continued

interviewer must ask questions properly and

intelligently and must record the responses

accurately and completely

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Merits

It is more flexible in comparison to mailing method.

It is faster than other methods i.e., a quick way of obtaininginformation.

It is cheaper than personal interviewing method; here the cost perresponse is relatively low.

Recall is easy; callbacks are simple and economical.

There is a higher rate of response than what we have in mailingmethod; the non-response is generally very low.

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Continued

Replies can be recorded without causing embarrassment torespondents.

Interviewer can explain requirements more easily.

At times, access can be gained to respondents who

otherwise cannot be contacted for one reason or the other. No field staff is required.

Representative and wider distribution of sample is possible.

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Demerits

Little time is given to respondents for considered answers;interview period is not likely to exceed five minutes in most cases.

Surveys are restricted to respondents who have telephone facilities.

Extensive geographical coverage may get restricted by costconsiderations.

It is not suitable for intensive surveys where comprehensiveanswers are required to various questions.

Possibility of the bias of the interviewer is relatively more.

Questions have to be short and to the point; probes are difficult tohandle

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In this method a questionnaire is sent (usually bypost) to the persons concerned with a request toanswer the questions and return the

questionnaire. A questionnaire consists of anumber of questions printed or typed in adefinite order on a form or set of forms.

Collection Of data through

Questionnaire

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Merits

There is low cost even when the universe is large and is widelyspread geographically.

It is free from the bias of the interviewer; answers are inrespondents own words.

Respondents have adequate time to give well thought out answers.

Respondents, who are not easily approachable, can also be reachedconveniently.

Large samples can be made use of and thus the results can be mademore dependable and reliable.

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Demerits

Low rate of return of the duly filled in questionnaires; biasdue to no-response is often indeterminate.

It can be used only when respondents are educated andcooperating.

The control over questionnaire may be lost once it is sent. There is inbuilt inflexibility because of the difficulty of

amending the approach once questionnaires have beendispatched

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Continued

There is also the possibility of ambiguous repliesor omission of replies altogether to certainquestions; interpretation of omissions is difficult.

It is difficult to know whether willing respondentsare truly representative.

This method is likely to be the slowest of all.

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Main aspects of a questionnaire:-

General form

Question sequence

Question formulation and wording

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COLLECTION OF DATA THROUGH

SCHEDULES

This method of data collection is very much like thecollection of data through questionnaire, with littledifference which lies in the fact that schedules(Performa containing a set of questions) are being filled

in by the enumerators who are specially appointed forthe purpose. This method of data collection is veryuseful in extensive enquiries and can lead to fairlyreliable result

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Thank you