Social media platforms use short, highly engaging videos to catch users' attention. While the short-form video feeds popularized by TikTok are rapidly spreading to other platforms, we do not yet understand their impact on cognitive functions. We conducted a between-subjects experiment (N=60) investigating the impact of engaging with TikTok, Twitter, and YouTube while performing a Prospective Memory task (i.e., executing a previously planned action). The study required participants to remember intentions over interruptions. We found that the TikTok condition significantly degraded the users' performance in this task. As none of the other conditions (Twitter, YouTube, no activity) had a similar effect, our results indicate that the combination of short videos and rapid context-switching impairs intention recall and execution. We contribute a quantified understanding of the effect of social media feed format on Prospective Memory and outline consequences for media technology designers to not harm the users' memory and wellbeing.

翻译：社交媒体平台通过简短、高吸引力的视频吸引用户注意力。尽管抖音开创的短视频信息流正在迅速扩展到其他平台，但我们对其对认知功能的影响尚不了解。我们进行了一项受试者间实验（N=60），研究在执行前瞻记忆任务（即执行先前计划好的动作）时，浏览抖音、推特和YouTube的影响。该实验要求参与者在中断后记住意图。我们发现，抖音条件显著降低了用户在该任务中的表现。由于其他条件（推特、YouTube、无活动）均未产生类似效果，我们的结果表明，短视频与快速情境切换的结合会损害意图的回忆与执行。我们量化了社交媒体信息流格式对前瞻记忆的影响，并为媒体技术设计师提供了避免损害用户记忆与福祉的准则。