［目的/意义］“搜索即学习”背景下，主要探讨认知风格和任务复杂度对移动端视频用户学习型搜索行为
的影响机理，该研究有助于深入理解用户视频搜索行为的本质，为更好地设计和优化移动端视频信息搜索系统，
提升视频搜索用户体验提供参考。［方法/过程］文章采用实验法，以哔哩哔哩视频平台为测试系统，将用户完成学
习型任务的搜索过程划分为知识获取阶段、知识学习阶段、互动反思阶段和知识整合阶段，以社会认知理论为指
导，考察个体因素(认知风格)、环境因素（任务复杂度）对用户视频搜索行为的影响。［结果/结论］研究发现，认知风
格主要影响用户在学习型搜索任务下知识获取阶段、知识学习阶段和知识整合阶段的行为，任务复杂度对用户视
频搜索行为的影响主要表现在知识获取阶段。研究结论有助于提高视频信息搜索用户的交互体验与学习效能，
并对优化视频信息搜索系统的交互设计与学习服务功能提供启示。

[Purpose/significance]“Search as Learning”is a hot research topic in the field of user information search
in recent years, the article mainly discusses the influence mechanism of cognitive style and task complexity on the mo?
bile video users’learning related search behavior, which helps to understand the essence of users’video search behav?
ior, and provides a reference for better designing and optimizing mobile video information search system to improve video search user experience.[Method/process] The article uses the experimental method, taking BiliBili video platform as the test system, and divides the search process of users completing learning-related tasks into knowledge acquisition stage, knowledge learning stage, interactive reflection stage and knowledge integration stage. Using social cognitive theory as a guide, it investigates the impact of individual factor (cognitive style) and environmental factor (task complexity) on users' video search behavior. [Result/conclusion] The results show that cognitive style mainly affects users’behavior in the stages of knowledge acquisition, knowledge learning and knowledge integration under the learning- related search tasks, and the influence of task complexity on users' behavior was mainly manifested in the knowledge acquisition stage. The research conclusions can help to enhance the interactive experience and learning efficiency of video information search users, and give enlightenment to optimize the interactive design and learning service function of video information search system.