(Non-) Involvement in Terrorist Violence Dataset (NITV)

This dataset describes 206 individuals who radicalised to extremism. Exactly half of the sample (N=103) radicalised to right-wing extremism, and half to jihadism. The sample is also split 50/50 in terms of the outcome of these radicalization processes: 103 individuals became involved in the planning, preparation or execution of terrorist attacks, the other 103 did not. The purpose of our dataset was to gain insights into what variables influence these outcome differences. To that end, we used a codebook to look at structural, group and individual-level variables theorised to influence the onset and outcome of radicalization processes. The dataset describes individuals from Europe and North-America (Canada / US) with an average date of birth of 1980. Data on our population was gathered from a range of sources, such as secondary literature (e.g. academic publications, think-tank reports), journalistic accounts, court records, (auto)biographies and, where possible, privileged information drawn from semi-structured interviews and material provided by the Dutch public prosecution service. To ensure their privacy and security, all personally-identifying information has been rigorously removed. This means that no data on names, exact dates of birth, places of residence etc. is included in the dataset. All interviewees were asked to sign consent forms and the project went through formal ethics approval by Leiden University's Faculty of Governance and Global Affairs (FGGA) Ethics Committee (ref: 2019-012-ISGA-Schuurman) before it commenced.本数据集共收录206名极端化个体。其中恰好一半样本（N=103）属于右翼极端主义极端化群体，另一半则为圣战主义极端化群体。该样本同时依据极端化进程的结果进行了50:50的分组：103名个体参与了恐怖袭击的策划、筹备或实施环节，剩余103名个体未参与此类活动。本数据集的构建目的在于探究哪些变量会对上述极端化结果差异产生影响。为此，我们采用编码手册，对理论上会影响极端化进程启动与结果的结构层面、群体层面及个体层面变量进行分析。本数据集收录的个体均来自欧洲与北美地区（加拿大/美国），平均出生年份为1980年。本数据集的数据来源于多类渠道，包括二手文献（如学术出版物、智库报告）、新闻报道、法庭记录、（自）传记，以及在可行范围内获取的半结构化访谈非公开资料与荷兰公共检察署提供的相关材料。为保障所有个体的隐私与安全，本数据集已严格移除所有个人身份识别信息，即未包含姓名、精确出生日期、居住地址等任何可识别个人身份的数据。所有受访对象均已签署知情同意书，且本项目在启动前已通过莱顿大学治理与全球事务学院（Faculty of Governance and Global Affairs，简称FGGA）伦理委员会的正式伦理审查（编号：2019-012-ISGA-Schuurman）。