Which data type includes dynamic measurements while performing a required task, such as reaching abilities and maneuvering?

• A. Ergonomics
• B. Interval data
• C. Functional data
• D. Nominal data scale

Answer: (C)

Dynamic measurements collected during a task are described as functional data. Functional data are curves or trajectories that are observed over a continuum like time, so when someone is reaching, grabbing, or maneuvering, you’re capturing movement profiles such as arm angle, hand position, or velocity as they unfold over time. Treating these observations as functions lets you analyze the entire movement shape, compare trajectories, and extract features like peak reach, duration, and smoothness, rather than just a single static value. In contrast, interval data would give static numerical values at specific points, nominal data would be categories, and ergonomics is a field concerned with human-product fit rather than a data type.