预测移动到目标区域所需的时间。
- Methodologies: 人体工程学, 产品设计
菲茨律师事务所
菲茨律师事务所
- 设计原则, 人体工程学, 人为因素, 人机交互, 交互设计, 可用性, 用户体验（UX）, 用户界面（UI）
Objective:
How it’s used:
- A model of human movement that predicts the time required to rapidly move to a target area is a function of the ratio between the distance to the target and the width of thetarget. It is widely used in user interface (UI) design to optimize the placement and size of interactive elements.
优点
- Provides a scientific basis for 用户界面设计 decisions; Helps to improve the usability of interfaces.
缺点
- 并未考虑所有影响用户交互的因素；在复杂的界面中可能难以应用。
Categories:
- 人体工程学, 产品设计
最适合：
- 设计用户界面时，应采用大而易于点击的按钮和其他交互元素。
Fitts’ Law plays a significant role in various industries beyond just user interface design, including gaming, mobile app development, and automotive dashboard design, where quick and precise interaction is crucial. In these contexts, engineers and designers employ the principles of Fitts’ Law during the prototyping and testing phases of a project. By assessing how users interact with different target sizes and distances, design teams can accurately determine the optimal dimensions for buttons, sliders, and navigational controls that enhance user experience. For instance, in gaming, positioning action buttons within easy reach of the thumb can lead to a more fluid gameplay experience, while in automotive design, ensuring that dashboard controls are easily accessible without distracting the driver is vital for safety. Typically, usability researchers or product designers initiate studies based on Fitts’ Law during user testing sessions, allowing them to gather quantitative data on movement times. This data enables design teams to understand user behavior better and refine their products to meet specific ergonomic criteria, leading to interfaces that not only perform well but also resonate with users’ physical capabilities and expectations, thereby facilitating greater adoption and satisfaction.
Key steps of this methodology
- 确定界面上的目标交互元素。
- 确定用户起始位置到目标位置的距离。
- 测量目标区域（交互元素）的宽度。
- 使用公式 ID = log2(2D/W) 计算难度指数 (ID)，其中 D 为距离，W 为宽度。
- 使用菲茨定律公式估算移动时间：MT = a + b * ID，其中 MT 为移动时间，a 和 b 为经验常数。
- 根据计算出的动作时间和难度指数，调整交互元素的大小和位置。
- 通过测试不同的配置来迭代设计，以优化用户体验。
专业提示
- 进行用户测试，以优化交互元素的大小和位置，具体步骤如下： 迭代设计 基于菲茨定律的原则。
- 分析用户界面组件的空间布局；将常用项目分组可以减少与目标的距离，提高效率。
- 实现悬停状态和触摸反馈，使用户感受到目标互动，从而确保更精确的交互，正如菲茨定律所建议的那样。
To read and compare several methodologies, we recommend the
> Extensive Methodologies Repository <
together with the 400+ other methodologies.
Your comments on this methodology or additional info are welcome on the comment section below ↓ , so as any engineering-related ideas or links.
历史背景
（如果日期未知或不相关，例如“流体力学”，则提供其显著出现的近似估计）
