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Data Collection Methodologies
CBR offers a comprehensive range of data collection methods,
both quantitative and qualitative.
Quantitative
Methodologies
Random Sampling Plan
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Door-to-Door Interview |
Telephone Interview |
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| Sample quota assigned to each city district proportionally, according to share of city population. |
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·Randomly choose neighborhoods
·Randomly choose starting point
·Record every 10th household, walking by “right hand rule” |
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·Randomly generate telephone numbers for the district according to fixed parameters by computer
·Dial each number and exclude those which aren’t households |
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Use Kish Grid to choose among qualified respondents
(return later if not home) |
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Intercept Procedure
| Quota |
Male |
Female |
Total |
| 15-19 yrs |
50 |
50 |
100 |
| 20-24 yrs |
50 |
50 |
100 |
| 25-29 yrs |
50 |
50 |
100 |
| 30-35 yrs |
50 |
50 |
100 |
| Total |
200 |
200 |
400 |
Quota sampling chart |
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Street intercept & first screening |
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Interview |
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Second screening at interview site |
CAPI/CATI
CBR employs Sawtooth Ci3 for computer-aided personal interviewing (CAPI) and computer-aided telephone interview (CATI).
CAPI/CATI improves questionnaire accuracy and complexity, and enables faster data delivery
CATI / CAPI |
Sample for CAPI/CATI Questionnaire Screen
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Pre-recruitment—F2F, FGD, IDI
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·Through contact network by contact persons,
·Use Qnr A, containing only demographics but not detailed project criteria to avoid cheating |
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·A second screening by full-time supervisors to select eligible respondents
·Use Qnr B, containing detailed project criteria such as product usage, lifestyle, etc. |
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·100% call backs by independent QC team
·Use Qnr C, to check the respondents authenticity & verify done work of fieldwork
·A further step is to check the database to see if the respondents have attended similar projects to avoid repeated respondents |
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Interviewer Selection & Training
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·Mainly undergraduate students (18-22 year old female)
·Also include some older housewives
·Must have good Mandarin and local language ability |
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·Must sign a part-time employment contract with CBR
·Must sign a confidential agreement for the specific project involved |
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| Training & Project Briefing |
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·8-12 hours long training by supervisors for general knowledge of fieldwork
·Pass test before officially becoming CBR interviewer
·At least 4 hours training for a specific project, including role play and debriefing |
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·Pilot interview and pilot debriefing prior to fieldwork
·All interviewers must conduct at least 1 pilot / accompanied interview
·Fieldwork only begins after pilot interview debriefing |
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