According to the dynamical systems theory, all of these task characteristics must be considered in studying the individual's performance except for the

The dynamical systems theory that individual performance can be based on gaining more task, individual socialization and training, and environmental factors. It requires adaptive behavior and movement which becomes the basis for the association of cognitive development through continuous action and manipulation. 

Dynamical systems theory explains that movement is a favorable opportunity for learning, Ex. Reading a book without any prior knowledge and involvement can be difficult.  Understanding and giving complex reasoning through statements can be difficult without experience.