Which theory describes the control of coordinated movement as dependent on the environment and task constraints?

• A. Dynamic Systems Theory
• B. Central Control/Motor Program Theory
• C. Degrees of Freedom Problem
• D. Fitts & Posner 3 Stage Model

Answer: (A)

Movement coordination emerges from the interaction of the person, the task, and the environment. Dynamic Systems Theory holds that there isn’t a single central controller; instead, the body, its movements, and the surrounding context constrain and influence each other, leading to self-organized, functional patterns of coordination. When environmental conditions or task goals change, those constraints shift and the system adapts, producing new stable patterns. Variability in how you move often reflects this adaptive search for a coordination pattern that works given the current constraints.

Other theories focus on different ideas. A central motor program view imagines a brain-generated command that dictates movement regardless of context, which doesn’t capture how actions adapt to different environments. The Degrees of Freedom Question is about how the nervous system selects among many possible joint configurations, not about how environment and task constraints shape real-time control. The Fitts & Posner model describes stages of learning over time, not the immediate, constraint-driven organization of movement.