请将以下对 jihadist propaganda 的研究综述翻译并总结成中文，并控制在150字以内。原文：This study investigated the content and effects of propaganda disseminated by jihadist groups on social media. The research utilized a mixed-methods approach, combining content analysis of over 1,000 posts on platforms like Twitter and Facebook, with surveys of 500 individuals to gauge the emotional and behavioral responses to this propaganda. Findings indicate that the textual and visual elements of the propaganda are designed to evoke strong emotional reactions, such as fear and anger, in the audience. These reactions can lead to behaviors supportive of the groups' goals, including spreading propaganda and recruiting new members. The study also highlights the role of social media in amplifying the reach and impact of this propaganda.
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这项研究调查了圣战组织在社交媒体上发布的宣传内容及其影响。研究采用混合方法，分析了推特和脸书上超过1,000篇帖子，并对500名受访者进行了调查，以评估这些宣传引起的情感和行为反应。研究发现，宣传中的文本和视觉元素旨在激发受众的强烈情感反应，如恐惧和愤怒，这些反应可能导致支持组织目标的行为，如传播宣传和招募新成员。研究还强调了社交媒体在扩大宣传范围和影响方面的作用。
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