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Scotland’s Census Quality Survey 2011

This report provides an overview of Scotland's Census Quality Survey (CQS) conducted in 2011. It explores the use of IT, survey design, and the importance of the CQS in providing reliable census data. The report also highlights key findings from the 2009 rehearsal and lessons learned for future surveys.

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Scotland’s Census Quality Survey 2011

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  1. Scotland’s Census Quality Survey 2011 Neil Jackson General Register Office for Scotland

  2. Agenda • Background • Overview of CQS • Use of IT in 2011 • 2011 survey design • 2009 rehearsal experience • Summary

  3. Why have a quality survey? • Self-completion census • Provide measure of reliability • Feed into future censuses

  4. Format of CQS • Post enumeration survey • Samples households that have responded to census • Re-asks census questions and compares results • Asks reason for any discrepancies

  5. Example 1 You’ve just told me that you have a mortgage, but in the census you said you own the house outright. Which was correct on census day? I have a mortgage. I must have misunderstood the question on the census. Correct response: Owns with a mortgage Reason for difference: Misunderstood question

  6. Example 2 You’ve just told me that you are retired, but in the census you said you were working full time. Which was correct on census day? I was working on census day, but I have since retired. Correct response: Full-time employee Reason for difference: No difference

  7. Output • Quality report giving accuracy rate for each question • Some examples from 2001: • sex 99.9% • hours worked 80.2% • qualifications 60.6% • number of rooms 77.5%

  8. Use of laptops • Lightweight mini-laptop • Preloaded with relevant census data • All data encrypted • Microsoft Access application • Regular uploads to census HQ

  9. Sample screenshot

  10. Example 1: Same response

  11. Example 2: Equivalent response

  12. Example 3: Different response

  13. Sample design • 1000 households • Not random • Three areas of different types: • Urban • Rural • Semi-rural/market town • Early census returns only • Results still useful

  14. Fieldwork design • 3 teams of 7 interviewers (including manager) • 50 households each • Assistant interviewers • Interview takes up to 1 hour • Household and person questions

  15. Lessons from rehearsal • Carry out as soon as possible after census day • Memory effect • Movers • Don’t ask about overnight visitors • Upload from home via broadband • Security features must be unobtrusive

  16. Some results from the rehearsal • Self-contained accommodation 98.7% • Country of birth 99.5% • Number of rooms 66.0% • Nature of disability 75.6%

  17. Summary • CQS gives measure of accuracy levels • Use of IT in field • 1000 households in selected areas • Rehearsed in 2009

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