A National Statistics Publication for Scotland 
Steven Hope
Ipsos MORI Scotland
Jamie Burnett
Ipsos MORI Sampling and Statistics
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Contents
1 Survey overview
1.1 Background to the SHS
2 Sample design, selection and allocation
2.1 Stratification by local authority
2.2 Allocating sample to different time periods
2.3 Allocating sample between contractor organisations and questionnaire modules
2.4 Sampling from the Postcode Address File
2.5 Multiple dwellings
2.6 Respondent selection
3 Data collection methods and instruments
3.1 Use of Computer Aided Personal Interviewing (CAPI)
3.2 Questionnaire development and changes
3.3 Questionnaire structure, length and content
3.4 Problems and errors in the survey scripts
3.5 Survey fieldwork
4 Fieldwork targets and outcomes
4.1 Sample performance18
4.2 Fieldwork performance
5 Weighting
5.1 Weighting for analysis based on household data
5.2 Weighting for analysis based on individual (random adult) data
5.3 Weighting for analysis based on the 'random schoolchild'
5.4 Weighting for the selection of a random child
5.5 Weighting for analysis based on the Travel Diary
6 Limitations of the data
6.1 Quarterly data for Scotland as a whole
7 Bias and data quality
8 Survey design factors and complex standard errors
A National Statistic publication for Scotland
List of Tables
Table 2-1: Projected two-year achieved sample size by local authority and SRS equivalent sample over target periods
Table 2-2: Procedure for allocating PSUs by month of fieldwork
Table 4-1: Deadwood rate assumptions and actual deadwood
Table 4-2: Summary of outcomes at issued addresses for 2007/2008 sample
Table 4-3: Trends in SHS response rates 1999 to 2008
Table 4-4: Household interview targets and numbers achieved in each local authority, 2007/2008
Table 4-5: Random adult (RA) response rates, 2007/2008
Table 7-1: Comparison of household types in the 2001 Census and the 2007/2008 SHS
Table 7-2: Comparison of housing variables in the 2001 Census and the 2007/2008 SHS
Table 7-3: Comparison of weighted and unweighted age and sex profile of 2007/2008 SHS data with 2008 GROS mid-year estimates
Table 7-4: Comparison of key variables relating to driving and transport
Table 7-5: Comparison of ethnicity in Census 2001 and 2007/2008 SHS
Table 7-6: Comparison of all Scottish households, all sampled households, all eligible households and participating households by urban rural classification
Table 7-7: Differences in the classification of sampled addresses and 2007/2008 participating households
Table 7-8: Comparison of economic activity variables among adults of working age
Table 8-1: Design factors and confidence intervals for key variables in 2007/2008 data