Final answer:
A self-paced motor skill is performed in a stationary environment where the individual chooses when to begin the action. It involves gross motor skills and large muscle movements, such as jumping or starting a dance move, and it's part of a natural development sequence that begins with reflex actions in newborns.
Step-by-step explanation:
A motor skill performed in a stationary environment where the performer determines when to begin the action is typically referred to as a self-paced motor skill. These skills are part of the gross motor skills category, which involves larger movements and primarily engages large muscle groups. Self-paced motor skills are initiated by individuals without external cues. For example, deciding when to start a jump or initiate a dance move is governed by the performer and occurs within a fixed environment. Fine motor skills, on the other hand, are more intricate and involve smaller muscle groups, such as those required for writing or manipulating small objects. Motor development progresses in a predictable sequence, where an individual learns to master simple stationary positions before moving on to more complex, voluntary movements. This development starts from reflex actions like sucking and rooting in newborns and evolves into advanced motor skills like walking or driving a car, as noted with the cerebellum's role in procedural learning and coordination.