Involves physical movement and coordination. The Taxonomies major categories in order of ascending difficulty are: Imitation: Observes skill and tries to repeat it. Manipulation: Performs skill according to instruction rather than observation. Precision: Reproduces a skill with accuracy, proportion and exactness. Usually performed independent of original source. Articulation: Combines one or more skills in sequence with harmony and consistency. Naturalization: Completes one or more skills with ease and becomes automatic.