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2009/10 Scottish Crime and Justice Survey: Technical Report

DescriptionTechnical report for the 2009/10 Scottish Crime and Justice Survey
Official Print Publication DateDecember 2010
Website Publication DateDecember 23, 2010


National Statistics Publication LogoLeon Page, Pat MacLeod, Neil Twist,

ISBN 978 0 7559 9566 0 (Web only publication)
DPPAS 10569

This document is also available in pdf format: Technical Report (799k), and Annexes (5.1mb)




1 Background
1.1 Introduction to the Scottish Crime and Justice Survey
1.2 Outputs from the SCJS 2009/10
1.3 Structure of the Technical Report

2 Sample Design and Selection
2.1 Introduction
2.2 Sample design
2.3 Sample frame
2.4 Stratification and clustering
2.5 Disproportional design
2.6 Sample selection
2.7 Allocation of assignments by month
2.8 Selection of individuals / dwellings

3 Questionnaire Content and Development
3.1 Structure and coverage of the questionnaire
3.2 Main questionnaire content
3.3 Victim form questionnaire structure
3.4 Victim form questionnaire contents
3.5 Main questionnaire content (continued)
3.6 Self-completion questionnaire contents
3.7 Questionnaire changes and piloting

4 Fieldwork
4.1 Briefing of interviewers
4.2 Supervision and quality control
4.3 Fieldwork dates and fieldwork management
4.4 Fieldwork procedures and documents
4.5 Response rate and reasons for non-response
4.6 Self-completion response rate and reasons for non-completion

5 The Interview
5.1 Survey reference period
5.2 Numbers of victim forms completed
5.3 Computer Assisted Personal Interviewing
5.4 Repetition of incident details in the self-completion questionnaire
5.5 Use of show cards
5.6 Length of interview
5.7 Presence of others during the interview
5.8 Self-completion interview

6 Data Processing
6.1 Offence coding process
6.2 Standard and open-end coding
6.3 Coding of occupation and socio-economic classification
6.4 Data checking

7 Offence Codes, Survey Statistics and Crime Groups
7.1 Crime types / offence codes covered by the survey
7.2 Survey statistics
7.3 Crime groups

8 Weighting
8.1 Introduction
8.2 Rationale for weighting
8.3 Weighting method
8.4 Household weights
8.5 Individual weights
8.6 Self-completion weights
8.7 Weighting Efficiency
8.8 Weighted and unweighted sample profiles
8.9 Victim form expansion factor / incident weight
8.10 Weighting and expansion variables in SPSS data files

9 Data Output
9.1 Introduction
9.2 Content of SPSS data files
9.3 Conventions used in SPSS data files

10 Confidence Intervals and Statistical Significance
10.1 Introduction
10.2 SCJS confidence intervals

11 Comparing the SCJS with Other Data Sources
11.1 Comparison with police recorded crime
11.2 Police recorded crime
11.3 Comparison with the British Crime Survey



Figure 1: Questionnaire structure
Figure 2: Survey reference period
Figure 3: Crime groups used in the SCJS 2009/10 Main Findings report
Figure 4: Comparable crime groups

Table 3.1: Quarter-sample module sample sizes
Table 4.1: Response rate and non-response outcomes
Table 4.2: % of respondents overall and in selected subgroups who did and who did not answer the self-completion section
Table 4.3: Reasons for self-completion refusal / interviewer completion
Table 5.1: Numbers of respondents who completed victim forms
Table 5.2: Average interview length by number of victim forms
Table 5.3: Average victim form length
Table 7.1: Offence codes included in the estimates of 'all SCJS crime' by crime group
Table 8.1: Main questionnaire unweighted and weighted sample profiles by age and gender
Table 8.2: Self-completion section unweighted and weighted sample profiles by age and gender
Table 8.3: Gross weighting variables in the SCJSSPSS data files
Table 8.4: Scaled weighting variables in the SCJSSPSS data files
Table 10.1: Rates, confidence intervals, standard errors and design factors for key crime groups (incidence rate per 10,000)

The views expressed in this report are those of the researcher and
do not necessarily represent those of the Department or Scottish Ministers.

This report is available on the Scottish Government Social Research website only