Victim Survey 2007 - South Africa

Abstract
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In 2007, the Institute for Security Studies (ISS) in South Africa conducted a national victims survey with the aim of measuring crime trends in the country, public perceptions about crime and safety, as well as confidence in the criminal justice system. The study covered all 9 provinces in South Africa and a total of 4 500 interviews were conducted across the study locations

Geographic coverage
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The survey had national coverage

Analysis unit
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The units of analysis in the study were individuals and households

Universe
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The survey was based on a representative sample of the population; both male and female respondents aged 16 years and above and who are residents in South Africa.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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Multi-stage cluster sampling was utilised, with Enumerator Areas (EAs) from the 2001 Census selected at the first stage of the sampling, households within the EAs at the second stage, and individuals within the household at the third stage. Based on the total number of households in South Africa (identified by the 2001 Census as 11,205,705), a total of 80,787 EAs were allocated. The total sample size was determined to be 4,050 households. The sample was calculated at a 95% confidence interval, and with a design effect of two. Ten interviews were collected from each EA. The distribution of the sample through the provinces is reflected in the table below. In total, a sample of 4,860 was realised.

Households were selected randomly in the following manner: Maps of the EAs were obtained prior to entry of the EA, and random starting points selected. The household nearest to the starting point was selected, and a household interval randomly selected by the supervisor using the day, week and month of the interview. Every nth household was then completed until the target number of interviews was obtained. Respondents over the age of 16 years were then randomly selected for interview using a KISH grid.

Mode of data collection
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Face-to-face [f2f]

Cleaning operations
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Capture was undertaken on Epi-Info. A process of double capture was undertaken in order to eliminate capture error.

摘要
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2007年，南非安全研究学院（Institute for Security Studies, ISS）开展了全国性受害者调查，旨在衡量该国犯罪趋势、公众对犯罪和安全感的认知，以及对刑事司法系统的信心。该研究覆盖南非所有九个省份，并在研究地点进行了总计4,500次访谈。
地理覆盖范围
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调查具有全国性覆盖。
分析单位
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本研究中的分析单位为个人和家庭。
总体
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调查基于代表性样本的总体；包括16岁及以上、居住在南非的男性和女性受访者。
数据类型
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样本调查数据 [ssd]
抽样程序
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采用了多阶段聚类抽样方法，在抽样第一阶段选取了2001年人口普查中的普查区（Enumerator Areas, EAs），在第二阶段选取了EAs内的家庭，在第三阶段选取了家庭内的个人。根据2001年人口普查确定的南非家庭总数（11,205,705户），共分配了80,787个EAs。样本总量确定为4,050户。样本计算在95%的置信区间内，设计效应为二。每个EAs收集了十个访谈。样本在各省的分布反映在下表中。总计实现了4,860个样本。
家庭的选择方式如下：在进入EAs之前获得EAs的地图，并选择随机起点。选择距离起点最近的家庭，由主管使用访谈的日、周和月随机选择家庭间隔。然后完成第n个家庭，直到获得目标数量的访谈。然后随机选择16岁以上的受访者进行访谈。
数据收集方式
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面对面 [f2f]
清理操作
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在Epi-Info上进行了捕获。为了消除捕获错误，执行了双重捕获过程。