$\textit{BrainForm}$ is a gamified Brain-Computer Interface (BCI) training system designed for scalable data collection using consumer hardware and a minimal setup. We investigated (1) how users develop BCI control skills across repeated sessions and (2) perceptual and performance effects of two visual stimulation textures. Game Experience Questionnaire (GEQ) scores for Flow}, Positive Affect, Competence and Challenge were strongly positive, indicating sustained engagement. A within-subject study with multiple runs, two task complexities, and post-session questionnaires revealed no significant performance differences between textures but increased ocular irritation over time. Online metrics$\unicode{x2013}$Task Accuracy, Task Time, and Information Transfer Rate$\unicode{x2013}$improved across sessions, confirming learning effects for symbol spelling, even under pressure conditions. Our results highlight the potential of $\textit{BrainForm}$ as a scalable, user-friendly BCI research tool and offer guidance for sustained engagement and reduced training fatigue.

翻译：$\textit{BrainForm}$ 是一款游戏化的脑机接口训练系统，旨在利用消费级硬件与极简设置实现可扩展的数据采集。我们研究了（1）用户如何在多次训练中发展脑机接口控制技能，以及（2）两种视觉刺激纹理对感知与表现的影响。游戏体验问卷在“心流体验”、“积极情绪”、“胜任感”和“挑战性”维度得分均显著积极，表明用户保持持续参与。一项包含多次实验、两种任务复杂度及训练后问卷的组内研究表明，纹理间未出现显著性能差异，但眼部不适感随时间增加。在线指标——任务准确率、任务时间与信息传输率——在多次训练中持续提升，证实了即使在压力条件下符号拼写任务也存在学习效应。我们的结果凸显了 $\textit{BrainForm}$ 作为可扩展、用户友好的脑机接口研究工具的潜力，并为维持用户参与度、降低训练疲劳提供了指导。