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Method of data  collection D.A. Asir John Samuel, MPT (Neuro Paed),  Lecturer, Alva’s college of Physiotherapy,           ...
Types of data• Primary data• Secondary data                  Dr.Asir John Samuel (PT), Lecturer, ACP
Primary Data collection methods• Observation method• Interview method• Questionnaires• Warranty cards• Distributor or stor...
Primary Data collection methods• Consumer panels• Use of mechanical devices• Projective techniques                Dr.Asir ...
Secondary data• Reliability of data• Suitability of data• Adequacy of data                  Dr.Asir John Samuel (PT), Lect...
Selection of appropriate method• Nature, scope and object of enquiry• Availability of funds• Time factor• Precision requir...
Questionnaires• Consists of no. of questions printed or typed  in definite order on a form or set of forms• Respondents ha...
3 main aspects• General form• Question sequence• Question formulation and wording                 Dr.Asir John Samuel (PT)...
General form• Structured/unstructured• Closed (Y/N) or open (inviting free response)• In pilot study unstructured then sta...
Question sequence• Clear and smoothly-moving• Easiest question being put in beginning• Avoid question that put too great s...
Question formulation and wording• Short and Easily understood• Simple and convey only one thought at a time• Concrete• Can...
Questionnaires - Merits• Low cost even when sample size is large• Free from bias of interviewer• Respondent who are not ea...
Questionnaires - Demerits• Low rate of return of duly filled in  questionnaires• Can be used only when respondents are  ed...
Questionnaires - Demerits• Interpretation of omissions is difficult• Control over the questionnaire may be lost  once it i...
Schedules• Performa containing a set of questions are  being filled in by the enumerators• Explain    aims          and   ...
Differences    Questionnaires                                             Schedules• Filled by respondents                ...
Differences    Questionnaires                                              Schedules• Personal contact not                ...
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6.method of data collection

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Transcript of "6.method of data collection"

  1. 1. Method of data collection D.A. Asir John Samuel, MPT (Neuro Paed), Lecturer, Alva’s college of Physiotherapy, Moodbidri Dr.Asir John Samuel (PT), Lecturer, ACP
  2. 2. Types of data• Primary data• Secondary data Dr.Asir John Samuel (PT), Lecturer, ACP
  3. 3. Primary Data collection methods• Observation method• Interview method• Questionnaires• Warranty cards• Distributor or store audits Dr.Asir John Samuel (PT), Lecturer, ACP
  4. 4. Primary Data collection methods• Consumer panels• Use of mechanical devices• Projective techniques Dr.Asir John Samuel (PT), Lecturer, ACP
  5. 5. Secondary data• Reliability of data• Suitability of data• Adequacy of data Dr.Asir John Samuel (PT), Lecturer, ACP
  6. 6. Selection of appropriate method• Nature, scope and object of enquiry• Availability of funds• Time factor• Precision required Dr.Asir John Samuel (PT), Lecturer, ACP
  7. 7. Questionnaires• Consists of no. of questions printed or typed in definite order on a form or set of forms• Respondents have to answer the questions on their own• Data is collected through mailing or distributing the questionnaires• Used in survey Dr.Asir John Samuel (PT), Lecturer, ACP
  8. 8. 3 main aspects• General form• Question sequence• Question formulation and wording Dr.Asir John Samuel (PT), Lecturer, ACP
  9. 9. General form• Structured/unstructured• Closed (Y/N) or open (inviting free response)• In pilot study unstructured then standardized Dr.Asir John Samuel (PT), Lecturer, ACP
  10. 10. Question sequence• Clear and smoothly-moving• Easiest question being put in beginning• Avoid question that put too great strain on memory, personal character, wealth, etc• General to more specific Dr.Asir John Samuel (PT), Lecturer, ACP
  11. 11. Question formulation and wording• Short and Easily understood• Simple and convey only one thought at a time• Concrete• Can be dichotomous, multiple choice or open- ended Dr.Asir John Samuel (PT), Lecturer, ACP
  12. 12. Questionnaires - Merits• Low cost even when sample size is large• Free from bias of interviewer• Respondent who are not easily approachable can be reached conveniently• More reliable• Respondents have adequate time to answer Dr.Asir John Samuel (PT), Lecturer, ACP
  13. 13. Questionnaires - Demerits• Low rate of return of duly filled in questionnaires• Can be used only when respondents are educated and cooperating• There is inbuilt inflexibility• Slowest of all Dr.Asir John Samuel (PT), Lecturer, ACP
  14. 14. Questionnaires - Demerits• Interpretation of omissions is difficult• Control over the questionnaire may be lost once it is sent• Difficult to know whether willing respondents are true representative Dr.Asir John Samuel (PT), Lecturer, ACP
  15. 15. Schedules• Performa containing a set of questions are being filled in by the enumerators• Explain aims and objectives, removes difficulties• Should have capacity to cross-examine in order to find out truth Dr.Asir John Samuel (PT), Lecturer, ACP
  16. 16. Differences Questionnaires Schedules• Filled by respondents • Filled by enumerators• Cheap • More expensive• Non-response is high • Low non-response• Not always clear • Clear• Very slow • Comparatively faster Dr.Asir John Samuel (PT), Lecturer, ACP
  17. 17. Differences Questionnaires Schedules• Personal contact not • Personal contact possible possible• Only literate and • Even illiterate cooperative • Small sample coverage• Wider sample coverage • Information collected is• Collecting incomplete complete and accurate and wrong information Dr.Asir John Samuel (PT), Lecturer, ACP
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