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2008-09 Scottish Crime and Justice Survey: Technical Report

Description2008/09 Scottish Crime and Justice Survey: Technical Report
ISBN
Official Print Publication DateFebruary 2010
Website Publication DateFebruary 16, 2010

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Leon Page, Pat MacLeod, Julia Rogers, Andrea Kinver, Aibek Iliasov, TNS- BMRB, Professor Andromachi Tseloni, Nottingham Trent University
ISBN 978 0 7559 9244 7 (Web only publication)
This document is also available in pdf format (596k)

Contents

Acknowledgements

SCJSpublications

1 Background
1.1 Introduction to the Scottish Crime and Justice Survey
1.2 Outputs from the SCJS 2008-09
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 Questionnaire development 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 Response to the self-completion questionnaire

5 The Interview
5.1 Survey reference period
5.2 Computer Assisted Personal Interviewing
5.3 Repetition of incident details and data forcing
5.4 Use of show cards
5.5 Length of interview
5.6 Presence of others during the interview

6 Data processing
6.1 Offence coding process
6.2 Standard back-coding
6.3 Open-ended coding
6.4 Coding of occupation and socio-economic classification
6.5 Data checking

7 Offence codes, survey statistics and crime groups
7.1 Crime types covered by the survey
7.2 Incidence, prevalence and repeat victimisation
7.3 Crime groups

8 Weighting
8.1 Rationale for weighting and methodology employed
8.2 Individual and household weights
8.3 Weighting method
8.4 Household weights
8.5 Individual weights
8.6 Self-completion weights
8.7 Weighted and unweighted sample profiles
8.8 Victim Form expansion factor / incident weight
8.9 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
9.4 A note to data users: missing data

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

Technical Report Annexes
A.1 Islands excluded from sample frame
A.2 Population targets used for weighting
A.3 Target sample size and issued addresses by fieldwork month
A.4 Sample strata
A.5 Sample clustering by PFA and CJAA and urban/rural
A.6 CAPI outcome codes and reissue criteria
A.7 Advance letter and leaflet
A.8 Plausibility and consistency checks
A.9 Household weighting rims targets
A.10 Individual weighting rims targets
A.11 Variables for analysis with household weights
A.12 Missing data
A.12.1 Questions and numbers of interviews affected
A.12.2 Options considered
A.12.3 Analysis of impact
A.12.4 Estimated effects on the extent of crime estimates