Creativity support tools (CSTs) aim to elevate the quality of artists' creative processes and artifacts. Yet most current CST evaluations overlook temporal and social aspects of tool use. To address this gap, we present a longitudinal, group-based CST evaluation through a three-week deployment of ArtKrit, a computational drawing tool that supports disciplined drawing. Nine digital artists, organized into three communities of practice, completed weekly "master studies" alongside a researcher-artist. Our results show users' evolving relationships with ArtKrit over time - from early experimentation to selective incorporation or misuse - alongside changes in their ways of artistic seeing. These changes unfolded within artist support networks that fostered confidence and creative safety, and validated individual expression. Overall, our findings suggest that CST evaluations can - and should - be designed as opportunities for meaningful artistic engagement rather than purely extractive measurement exercises. We contribute this longitudinal, group-based approach as one CST evaluation method.

翻译：创造力支持工具（CST）旨在提升艺术家创作过程与艺术品的质量。然而，当前多数CST评估忽视了工具使用的时间维度与社会维度。为弥补这一缺陷，我们通过为期三周的ArtKrit（一种支持规范绘图的计算性绘图工具）部署，开展了一项基于组群的纵向CST评估。九名数字艺术家被组织为三个实践社群，与研究型艺术家共同完成每周的"大师研习"。结果显示，用户与ArtKrit的关系随时间演变——从早期实验到选择性整合或误用——同时其艺术观察方式也发生转变。这些变化在艺术家支持网络中展开，该网络既培养了自信与创作安全感，又肯定了个体表达。总体而言，我们的研究发现表明：CST评估能够且应当被设计为有意义艺术实践的契机，而非纯粹的提取性测量活动。我们贡献了这种基于组群的纵向方法，作为CST评估的一种手段。